# IEEE Journal of Quantum Electronics

Includes the top 50 most frequently accessed documents for this publication according to the usage statistics for the month of

• ### Radio-Over-Fiber Technologies for Emerging Wireless Systems

Publication Year: 2016, Article Sequence Number: 0600311
Cited by:  Papers (9)
| | PDF (3410 KB) | HTML

Radio-over-fiber transmission has extensively been studied as a means to realizing a fiber optic wireless distribution network that enables seamless integration of the optical and wireless network infrastructures. Emerging wireless communication networks that support new broadband services provide increased opportunities for photonics technologies to play a prominent role in the realization of the... View full abstract»

• ### Electrooptical effects in silicon

Publication Year: 1987, Page(s):123 - 129
Cited by:  Papers (1206)  |  Patents (57)
| | PDF (1959 KB)

A numerical Kramers-Kronig analysis is used to predict the refractive-index perturbations produced in crystalline silicon by applied electric fields or by charge carriers. Results are obtained over the1.0-2.0 mum optical wavelength range. The analysis makes use of experimental electroabsorption spectra and impurity-doping spectra taken from the literature. For electrorefraction at the i... View full abstract»

• ### Engineered $pi$ -Phase-Shifted Fiber Bragg Gratings for Efficient Distributed Feedback Raman Fiber Lasers

Publication Year: 2018, Article Sequence Number: 1600307
| | PDF (1198 KB) | HTML

Distributed feedback Raman fiber lasers with π-phase-shifted uniform gratings are modeled and simulated in the steady state, to optimize their performance. Using the parameters of realistic devices, it is found that the position change of the π-phase-shift in a constant-strength uniform grating has a significant impact on the laser performance including right and left-hand-side outpu... View full abstract»

• ### Advanced VCSEL Technology: Self-Heating and Intrinsic Modulation Response

Publication Year: 2018, Article Sequence Number: 2400209
| | PDF (1350 KB) | HTML

Experimental data and modeling results are presented for a new type of vertical-cavity surface-emitting laser (VCSEL) that solves numerous problems with oxide VCSELs. In addition, the new oxide-free VCSEL can be scaled to small size. Modeling shows that this small size can dramatically increase the speed of the laser through control of self-heating. Modeling compared with both the oxide and the ne... View full abstract»

• ### Coupled-mode theory for guided-wave optics

Publication Year: 1973, Page(s):919 - 933
Cited by:  Papers (1018)  |  Patents (50)
| | PDF (3552 KB)

The problem of propagation and interaction of optical radiation in dielectric waveguides is cast in the coupled-mode formalism. This approach is useful for treating problems involving energy exchange between modes. A derivation of the general theory is followed by application to the specific cases of electrooptic modulation, photoelastic and magnetooptic modulation, and optical filtering. Also tre... View full abstract»

• ### Oxide-Confined VCSELs for High-Speed Optical Interconnects

Publication Year: 2018, Article Sequence Number: 2400115
| | PDF (2943 KB) | HTML

The electrically pumped vertical-cavity surface-emitting laser (VCSEL) was first demonstrated with metal cavities by Iga (1979); however, the device threshold current was too high. Distributed Bragg reflector cavities proposed by Scifres and Burnham (1975) were adopted to improve the optical cavity loss. Yet, it was not a practical use until the discovery of the native oxide of AlGaAs and the inse... View full abstract»

• ### Theory of the linewidth of semiconductor lasers

Publication Year: 1982, Page(s):259 - 264
Cited by:  Papers (1308)  |  Patents (12)
| | PDF (635 KB)

A theory of the spectral width of a single-mode semiconductor laser is presented and used to explain the recent measurements of Fleming and Mooradian on AlGaAs lasers. They found the linewidth to be inversely proportional to power and to have a value of 114 MHz at 1 mW per facet. This value is 30 times greater than can be explained by existing theories. The enhanced linewidth is attributed to the ... View full abstract»

• ### An out-of-plane grating coupler for efficient butt-coupling between compact planar waveguides and single-mode fibers

Publication Year: 2002, Page(s):949 - 955
Cited by:  Papers (303)  |  Patents (40)
| | PDF (611 KB) | HTML

We have designed and fabricated an out-of-plane coupler for butt-coupling from fiber to compact planar waveguides. The coupler is based on a short second-order grating or photonic crystal, etched in a waveguide with a low-index oxide cladding. The coupler is optimized using mode expansion-based simulations. Simulations using a 2-D model show that up to 74% coupling efficiency between single-mode f... View full abstract»

• ### Optical pulse compression with diffraction gratings

Publication Year: 1969, Page(s):454 - 458
Cited by:  Papers (701)  |  Patents (34)
| | PDF (576 KB)

The theory of the diffraction grating pair is developed by expanding the frequency dependence of the phase shift as far as the quadratic frequency term. The analogy between pulse compression and Fresnel diffraction is treated. The effect of the cubic phase term is discussed for ultrashort pulses having appreciable fractional bandwidth. View full abstract»

• ### A review of the optical properties of biological tissues

Publication Year: 1990, Page(s):2166 - 2185
Cited by:  Papers (1274)  |  Patents (176)
| | PDF (1324 KB)

The known optical properties (absorption, scattering, total attenuation, effective attenuation, and/or anisotropy coefficients) of various biological tissues at a variety of wavelengths are reviewed. The theoretical foundations for most experimental approaches are outlined. Relations between Kubelka-Munk parameters and transport coefficients are listed. The optical properties of aorta, liver, and ... View full abstract»

• ### Sensitive measurement of optical nonlinearities using a single beam

Publication Year: 1990, Page(s):760 - 769
Cited by:  Papers (4349)  |  Patents (9)
| | PDF (892 KB)

A sensitive single-beam technique for measuring both the nonlinear refractive index and nonlinear absorption coefficient for a wide variety of materials is reported. The authors describe the experimental details and present a comprehensive theoretical analysis including cases where nonlinear refraction is accompanied by nonlinear absorption. In these experiments, the transmittance of a sample is m... View full abstract»

• ### Temporal coupled-mode theory and the presence of non-orthogonal modes in lossless multimode cavities

Publication Year: 2004, Page(s):1511 - 1518
Cited by:  Papers (155)  |  Patents (12)
| | PDF (352 KB) | HTML

We develop a general temporal coupled-mode theory for multimode optical resonators. This theory incorporates a formal description of a direct transmission pathway, and is therefore capable of describing Fano interference phenomena in multimode cavities. Using this theory, we prove a general criterion that governs the existence of nonorthogonal modes. The presence of nonorthogonal modes creates int... View full abstract»

• ### Thermal Characteristics of Brillouin Microsphere Lasers

Publication Year: 2018, Article Sequence Number: 1000108
| | PDF (2133 KB) | HTML

In this paper, we investigate the thermal characteristics of Brillouin microsphere lasers. A mathematical model for Brillouin lasing in a waveguide coupled microcavity is constructed based on the coupled mode theory, the analytic correlation between lasing and thermal power is given. To track the thermal responses of Brillouin microlasers, we introduce two kinds of thermal perturbations on the pac... View full abstract»

• ### Improved Bend Loss Formula Verified for Optical Fiber by Simulation and Experiment

Publication Year: 2007, Page(s):899 - 909
Cited by:  Papers (98)
| | PDF (1596 KB) | HTML

This paper presents an improved curvature loss formula for optical waveguides, which is shown to accurately predict the bend loss of both single-mode and multimode fibers. The formula expands upon a previous formula derived by Marcuse, greatly improving its accuracy for the case of multimode fiber. Also presented are the results of bent fiber simulations using the beam propagation method (BPM), an... View full abstract»

• ### Dynamics of Stokes Waves and Pulses Generated by Stimulated Brillouin Scattering in a Resonator Including Highly Nonlinear Fiber

Publication Year: 2016, Article Sequence Number: 6800208
Cited by:  Papers (1)
| | PDF (1019 KB) | HTML

We experimentally and theoretically investigate the generation of Stokes waves and the dynamics of pulses produced by cascaded stimulated Brillouin scattering (SBS) in a resonator, including a highly nonlinear fiber (HNLF) and an in-cavity erbium-doped fiber amplifier (EDFA) forming a multi-wavelength Brillouin erbium-doped fiber laser system. Using coupled wave equations with the Brillouin pump, ... View full abstract»

• ### Response Flattening of Efficient Broadband Wavelength Converters Based on Cascaded Sum and Difference Frequency Generation in Periodically Poled Lithium Niobate Waveguides

Publication Year: 2009, Page(s):1114 - 1120
Cited by:  Papers (5)
| | PDF (487 KB) | HTML

For the single-pass and double-pass wavelength converters based on cascaded sum and difference frequency generation in quasi-phase matched lithium niobate waveguide, we present the criteria for a choice of the waveguide length and the assignment of pump powers to achieve the desired efficiency, ripple and bandwidth with a large pump wavelength difference of 75 nm. It is found that using the double... View full abstract»

• ### Vertical Electrical Conductivity of ZnO/GaN Multilayers for Application in Distributed Bragg Reflectors

Publication Year: 2018, Article Sequence Number: 2400406
| | PDF (1529 KB) | HTML

We have demonstrated an electrically conductive ZnO/GaN multilayer structure using hybrid plasma-assisted molecular beam epitaxy. Electrical I-V characteristics were measured through the top three pairs of a six pair ZnO/GaN sample. The total measured resistance was dominated by lateral and contact resistances, setting an upper limit of ~10-4 Ω·cm2 for the verti... View full abstract»

• ### Novel Designs for Efficient Broadband Frequency Doublers Using Singly Pump-Resonant Waveguide and Engineered Chirped Gratings

Publication Year: 2009, Page(s):187 - 194
Cited by:  Papers (14)  |  Patents (1)
| | PDF (522 KB) | HTML

Novel engineered step-chirped gratings (SCG) for broadband frequency doublers based on quasi-phase matched second harmonic generation with and without singly pump-resonance in lithium niobate waveguides have been theoretically modeled and simulated taking pump depletion into account, for the first time to our knowledge. It is shown that apodized SCGs flatten the conversion bandwidth which can be i... View full abstract»

• ### Frequency Tuning Range Control in Pulsed Terahertz Quantum-Cascade Lasers: Applications in Interferometry

Publication Year: 2018, Article Sequence Number: 2300108
| | PDF (2503 KB) | HTML Media

Terahertz quantum cascade-lasers (QCLs) are able to produce higher optical output power at higher temperatures when operated in pulsed mode. Predicting a laser's behavior under pulsed operation in order to achieve performance requirements is, however, a nontrivial exercise: the complex and nonlinear interplay between current, electric field, and thermal transients gives rise to complex responses i... View full abstract»

• ### Ytterbium-doped fiber amplifiers

Publication Year: 1997, Page(s):1049 - 1056
Cited by:  Papers (381)  |  Patents (30)
| | PDF (144 KB)

The ytterbium-doped fiber amplifier offers a number of attractive features, including a broad-gain bandwidth and a high efficiency, due in large part to its freedom from various competing processes seen in other rare-earth dopants. Here we discuss the main features that influence design and possible applications of ytterbium-doped fiber amplifiers View full abstract»

• ### Chip-Based Brillouin Processing for Phase Control of RF Signals

Publication Year: 2018, Article Sequence Number: 6300413
| | PDF (3696 KB) | HTML

Manipulating radio frequency (RF) signals in integrated photonic devices has recently emerged as a new paradigm for wireless communications, enabling high-frequency signal processing and broadband frequency agility in miniaturized photonic platforms. These advances are crucial for space and airborne applications which are weight and size sensitive. Recent progress in on-chip stimulated Brillouin s... View full abstract»

• ### Ultra-Fast Millimeter Wave Beam Steering

Publication Year: 2016, Article Sequence Number: 0600708
Cited by:  Papers (4)
| | PDF (1445 KB) | HTML

In this paper, we demonstrate ultra-fast millimeter wave beam steering with settling times below 50 ps. A phased array antenna with two elements is employed to realize beam steering. The phased array feeder is implemented with a recently introduced time delay line that provides, at the same time, an ultra-fast tunability, broadband operation, and continuous tuning. Our implementation is used to pe... View full abstract»

• ### Plasmonic Enhancement of Colloidal Quantum Dot Infrared Photodetector Photosensitivity

Publication Year: 2018, Article Sequence Number: 7200207
| | PDF (1211 KB) | HTML

Infrared photodetector based on lead sulfide (PbS) colloidal quantum dot has been shown to be a promising candidate for infrared detectors, due to the low-cost process of fabrication and their extremely high sensitivity. Moreover, these photodetectors have successfully achieved ultrahigh detectivity - exceeding the indium gallium arsenide-based photodetectors - at room temperature. In this paper, ... View full abstract»

• ### External optical feedback effects on semiconductor injection laser properties

Publication Year: 1980, Page(s):347 - 355
Cited by:  Papers (1464)  |  Patents (15)
| | PDF (3184 KB)

Influences on the semiconductor laser properties of external optical feedback, i.e., return of a portion of the laser output from a reflector external to the laser cavity, have been examined. Experimental observations with a single mode laser is presented with analysis based on a compound cavity laser model, which has been found to explain essential features of the experimental results. In particu... View full abstract»

• ### Measuring the Internal Quantum Efficiency of Light-Emitting Diodes at an Arbitrary Temperature

Publication Year: 2018, Article Sequence Number: 8000106
| | PDF (988 KB) | HTML

We present a method of measuring the internal quantum efficiency (IQE) of light-emitting diodes (LEDs) as a function of driving current at an arbitrary temperature only with experimentally measurable quantities of optical power and current. The measurement procedure starts to find an exact value of the IQE at the reference point where the injection efficiency is considered as 100% and the radiativ... View full abstract»

• ### Optoelectronic Oscillators (OEOs) to Sensing, Measurement, and Detection

Publication Year: 2016, Article Sequence Number: 0601116
Cited by:  Papers (14)
| | PDF (3665 KB) | HTML

Besides distinct features on RF/optical signal generation, optoelectronic oscillators (OEOs) have also been rapidly developed as emerging techniques towards sensing, measurement, and detection. In this paper, we start with the conceptual architecture and the analytical model of OEOs. Then, three operation principles behind sensing, measurement, and detection applications are categorized, including... View full abstract»

• ### Resonant grating waveguide structures

Publication Year: 1997, Page(s):2038 - 2059
Cited by:  Papers (319)  |  Patents (39)
| | PDF (832 KB)

Under certain conditions, a resonance phenomenon can occur in waveguide grating structures. Such structures have multilayer configuration, the most basic of which is comprised of a substrate, a thin dielectric layer or semiconductor waveguide layer, and an additional transparent layer in which a grating is etched. When such a structure is illuminated with an incident light beam, part of the beam i... View full abstract»

• ### Thin-Film Schottky Barrier Photodetector Models

Publication Year: 2010, Page(s):633 - 643
Cited by:  Papers (93)  |  Patents (3)
| | PDF (3294 KB) | HTML

Phenomenological models for the internal quantum efficiency of Schottky barrier photodetectors suitable for the detection of optical radiation below the bandgap energy of the semiconductor are presented and discussed. The detection mechanism is internal photoemission from the metal film into the semiconductor substrate. Three detector configurations are considered: the first consists of a thick me... View full abstract»

• ### Optimization of photomixers and antennas for continuous-wave terahertz emission

Publication Year: 2005, Page(s):717 - 728
Cited by:  Papers (114)  |  Patents (3)
| | PDF (1136 KB) | HTML

We have studied terahertz emission from interdigitated finger photomixers coupled to planar antenna structures. Using both pulsed and continuous-wave excitation, polarization measurements reveal that the antenna design dominates the properties of the radiated output at frequencies below 0.6 THz, while the efficiency at higher frequencies is additionally dependent on the design of the photomixer fi... View full abstract»

• ### Linewidth determination from self-heterodyne measurements with subcoherence delay times

Publication Year: 1986, Page(s):2070 - 2074
Cited by:  Papers (145)  |  Patents (1)
| | PDF (1168 KB)

The behavior of the power spectrum of an external cavity semiconductor laser has been studied using a delayed self-heterodyne interferometric technique that uses delay times less than the laser's coherence time. Experimental results show that the resulting power spectrum is consistent with the theoretical model. However, there is evidence that additional frequency fluctuations are present that cau... View full abstract»

• ### Advanced Integration Techniques on Broadband Millimeter-Wave Beam Steering for 5G Wireless Networks and Beyond

Publication Year: 2016, Article Sequence Number: 0600620
Cited by:  Papers (13)
| | PDF (3787 KB) | HTML

Recently, the desired very high throughput of 5G wireless networks drives millimeter-wave (mm-wave) communication into practical applications. A phased array technique is required to increase the effective antenna aperture at mm-wave frequency. Integrated solutions of beamforming/beam steering are extremely attractive for practical implementations. After a discussion on the basic principles of rad... View full abstract»

• ### Lateral Current Spreading in III-N Ultraviolet Vertical-Cavity Surface-Emitting Lasers Using Modulation-Doped Short Period Superlattices

Publication Year: 2018, Article Sequence Number: 2400507
| | PDF (1673 KB) | HTML Media

Lateral hole injection into AlGaN-based ultraviolet (UV) vertical-cavity light-emitting lasers (VCSELs) has been studied via numerical simulation. For blue and violet vertical cavity light emitters, indium tin oxide (ITO) is most commonly used as a transparent current spreading layer to increase the overlap between the optical mode and the radial current profile. However, ITO has very high optical... View full abstract»

• ### Injection locking properties of a semiconductor laser

Publication Year: 1982, Page(s):976 - 983
Cited by:  Papers (421)  |  Patents (2)
| | PDF (976 KB)

Injection locking properties of a semiconductor laser have been analyzed, taking into account the injected carrier density dependent refractive index in the active region. It has been found that this dependence significantly affects the injection locking properties, giving rise to a peculiar asymmetric tuning curve and dynamic instability. The instability originates from the intermode interaction ... View full abstract»

• ### Mode Splitting Based on Polarization Manipulation in Few-Mode Fiber

Publication Year: 2018, Article Sequence Number: 6800306
| | PDF (1824 KB) | HTML

We report a mode splitting technique for LP01 and LP11 modes based on polarization manipulation in a few-mode fiber (FMF) by using a three-paddle two-mode fiber polarization controller (TMPC). In the characterization test, LP01 and LP11 modes are simultaneously excited in a two-mode fiber (TMF) based on core-offset splicing technique. By employing the TM... View full abstract»

• ### Self-phase modulation and spectral broadening of optical pulses in semiconductor laser amplifiers

Publication Year: 1989, Page(s):2297 - 2306
Cited by:  Papers (680)  |  Patents (4)
| | PDF (844 KB)

Amplification of ultrashort optical pulses in semiconductor laser amplifiers is shown to result in considerable spectral broadening and distortion as a result of the nonlinear phenomenon of self-phase modulation (SPM). The physical mechanism behind SPM is gain saturation, which leads to intensity-dependent changes in the refractive index in response to variations in the carrier density. The effect... View full abstract»

• ### Dependence of Beam Quality on Optical Intensity Asymmetry in In-Phase Coherently Coupled VCSEL Array

Publication Year: 2018, Article Sequence Number: 2400306
| | PDF (2313 KB) | HTML

Dependence of beam quality on optical intensity asymmetry among elements in in-phase coherently coupled vertical cavity surface emitting lasers array is analyzed using the finite-difference time domain solutions software. The analysis results reveal that the coupling efficiency of in-phased array decreases and the divergence increases as the level of optical intensity asymmetry increases. Furtherm... View full abstract»

• ### Carrier-induced change in refractive index of InP, GaAs and InGaAsP

Publication Year: 1990, Page(s):113 - 122
Cited by:  Papers (498)  |  Patents (5)
| | PDF (836 KB)

The change in refractive index Δn produced by injection of free carriers in InP, GaAs, and InGaAsP is theoretically estimated. Bandfilling (Burstein-Moss effect), bandgap shrinkage, and free-carrier absorption (plasma effect) are included. Carrier concentrations of 1016/cm3 to 1019/cm 3 and photon energies of 0.8 to 2.0 eV are considered. ... View full abstract»

• ### Solid-state time-of-flight range camera

Publication Year: 2001, Page(s):390 - 397
Cited by:  Papers (253)  |  Patents (40)
| | PDF (216 KB) | HTML

The concept of a real-time range camera without moving parts is described, based on the time-of-flight (TOF) principle. It operates with modulated visible and near-infrared radiation, which is detected and demodulated simultaneously by a 2-D array of lock-in pixels employing the charge-coupled device principle. Each pixel individually measures the amplitude, offset and phase of the received radiat... View full abstract»

• ### Picosecond Pulse Generation and Pulse Train Stability of A Monolithic Passively Mode-Locked Semiconductor Quantum-Well Laser at 1070 nm

Publication Year: 2018, Article Sequence Number: 2000609
| | PDF (2553 KB) | HTML

We experimentally study the pulse generation and the pulse train timing and amplitude stability of a monolithic passively mode-locked multisection quantum-well semiconductor laser. The laser emits a stable optical pulse train at a wavelength of 1070 nm and at a fundamental repetition rate of 20 GHz. Timing jitter and amplitude jitter analysis allows identifying distinct laser operating regimes of ... View full abstract»

• ### Dual-Wavelength Thulium Fluoride Fiber Laser Based on SMF-TMSIF-SMF Interferometer as Potential Source for Microwave Generation in 100-GHz Region

Publication Year: 2018, Article Sequence Number: 1600207
| | PDF (1747 KB) | HTML

A dual-wavelength thulium-doped fluoride fiber (TDFF) laser is presented. The generation of the TDFF laser is achieved with the incorporation of a single mode-multimode-single mode (SMS) interferometer in the laser cavity. The simple SMS interferometer is fabricated using the combination of two-mode step index fiber and single-mode fiber. With this proposed design, as many as eight stable laser li... View full abstract»

• ### Optical transmission characteristics of fiber ring resonators

Publication Year: 2004, Page(s):726 - 730
Cited by:  Papers (113)  |  Patents (2)
| | PDF (240 KB) | HTML

We present the results of an experimental investigation of the transfer characteristics of a fiber ring resonator for various values of the resonator finesse. In particular, we measure the spectral dependence of the intensity transmission and the induced phase shift in the undercoupled, critically coupled, and overcoupled regimes. We also demonstrate tunable optical (true time) group delay via a f... View full abstract»

• ### Large single-mode rib waveguides in GeSi-Si and Si-on-SiO2

Publication Year: 1991, Page(s):1971 - 1974
Cited by:  Papers (366)  |  Patents (20)
| | PDF (276 KB)

Mode-matching and beam-propagation methods are used to analyze single-mode operation of optical GeSi-Si and Si-SiO2 semiconductor rib waveguides. The waveguide dimensions that allow only the fundamental HE00 or EH00 mode to propagate have been determined. For both material systems, it is found that the rib can be several microns wide and several microns high, thus ... View full abstract»

• ### Laser ablation and micromachining with ultrashort laser pulses

Publication Year: 1997, Page(s):1706 - 1716
Cited by:  Papers (434)  |  Patents (87)
| | PDF (224 KB)

The mechanisms of ultrashort-pulse laser ablation of materials are discussed, and the differences to that of long laser pulses are emphasized. Ultrashort laser pulses offer both high laser intensity and precise laser-induced breakdown threshold with reduced laser fluence. The ablation of materials with ultrashort pulses has a very limited heat-affected volume. The advantages of ultrashort laser pu... View full abstract»

• ### Millimeter-Wave and Terahertz-Wave Applications Enabled by Photonics

Publication Year: 2016, Article Sequence Number: 0600912
Cited by:  Papers (7)
| | PDF (4350 KB) | HTML

This paper describes continuous millimeter-wave and terahertz (THz)-wave applications, where telecom-based photonics technologies are efficiently employed to enhance their performance. First, 300-GHz-band wireless communications are described toward real-time error-free transmissions at 50 Gbit/s and beyond. Next, a novel approach to increase a phase measurement sensitivity in THz frequency-domain... View full abstract»

• ### Using Image Analysis to Determine Ideal Aperture Conditions for Optimal Z-Scan Signal Quality

Publication Year: 2018, Article Sequence Number: 9000109
| | PDF (1655 KB) | HTML

An image analysis technique that is insensitive to power fluctuations and beam steering issues, and can be used with non TEM00 Gaussian beams, is introduced to determine the nonlinear properties of materials using the well-known Z-scan experimental technique. Instead of measuring the transmission through or around a physical aperture, this method records the complete beam profile digitally at each... View full abstract»

• ### Near-Infrared Organic Photodiodes

Publication Year: 2013, Page(s):1016 - 1025
Cited by:  Papers (9)
| | PDF (3234 KB) | HTML

Organic photodiodes (OPDs) are attractive as solution-processed devices for sensing applications. Industrial and medical sensors often have the requirement to operate in the near-infrared (NIR) spectrum between 650 and 900 nm and are ideally visible-blind. Due to the tailored spectral sensitivity of the organic semiconductors, OPDs are attractive as filter-free solid-state alternative. In addition... View full abstract»

• ### A Broadband Terahertz Metamaterial Absorber Based on Two Circular Split Rings

Publication Year: 2017, Article Sequence Number: 8500206
Cited by:  Papers (1)
| | PDF (1567 KB) | HTML

We present a broadband terahertz metamaterial absorber, of which the unit cell is made up of two cirular split rings, a dielectric substrate and a metallic ground. The simulation results show that the absorber achieves a broadband absorption from 0.85 to 1.926 THz with the absorptivity beyond 90% at normal incidence, and the bandwidth is 1.076 THz, which is 77.52% with respect to the central frequ... View full abstract»

• ### Full-Vectorial Mode Coupling in Optical Fibers

Publication Year: 2018, Article Sequence Number: 6800207
| | PDF (3303 KB) | HTML

Optical full-vectorial modes have closely attracted much attention because of their unique optical features and thus may develop the fundamental researches and new functionalities of light. Beyond the conventional linear polarization modal coupling, we thoroughly investigate the inherent polarization-dependence and polarization-isolation features for full-vectorial mode coupling in optical fibers,... View full abstract»

• ### Integrated Circularly Polarized OAM Generator and Multiplexer for Fiber Transmission

Publication Year: 2018, Article Sequence Number: 8400109
| | PDF (1603 KB) | HTML

Unlike linearly polarized modes in fiber, modes exploiting orbital angular momentum (OAM) are circularly polarized when propagating in fiber. The use of OAM modes for spatial multiplexing requires efficient, low cost mode generators and multiplexers. We propose such a device based on the standard 220-nm silicon-on-insulator platform, taking multiple single-mode data-modulated signals, and imprinti... View full abstract»

• ### Epitaxial Designs for Maximizing Efficiency in Resonant Tunneling Diode Based Terahertz Emitters

Publication Year: 2018, Article Sequence Number: 8500211
| | PDF (2072 KB) | HTML

We discuss the modelling of high current density InGaAs/AlAs/InP resonant tunneling diodes to maximize their efficiency as THz emitters. A figure of merit which contributes to the wall plug efficiency, the intrinsic resonator efficiency, is used for the development of epitaxial designs. With the contribution of key parameters identified, we analyze the limitations of accumulated stress to assess t... View full abstract»

## Aims & Scope

The IEEE Journal of Quantum Electronics is dedicated to the publication of manuscripts reporting novel experimental or theoretical results in the broad field of the science and technology of quantum electronics.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Prof. Hon Ki Tsang
Chinese University of Hong Kong