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Quantum Electronics, IEEE Journal of

Issue 9 • Date Sept. 2013

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Displaying Results 1 - 17 of 17
  • Front cover

    Publication Year: 2013 , Page(s): C1
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  • IEEE Journal of Quantum Electronics publication information

    Publication Year: 2013 , Page(s): C2
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  • Table of contents

    Publication Year: 2013 , Page(s): 729 - 730
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  • Lateral Oxidation of AlAs for Circular and Inverted Mesa Saturable Bragg Reflectors

    Publication Year: 2013 , Page(s): 731 - 738
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1930 KB) |  | HTML iconHTML  

    A model of the thermal oxidation kinetics that is based on the continuity equation is adapted to the fabrication of circular saturable Bragg reflector (SBR) mesa structures, as well as inverted mesa array structures. A comparison between theoretical calculations and experimental measurements shows good agreement, making the model a useful tool for the controllability of the structure-dependent oxidation process. The model is applied to the wet oxidation of buried AlAs layers for the fabrication of ultra-broadband, high index contrast, III-V/ AlxOy SBRs. The rate of oxidation is found to be dependent not only on the oxidation temperature, but also on oxidation time, mesa geometry, and AlAs layer thickness. The two distinct large-area SBR structures, the circular mesa and the inverted mesa, are fabricated. View full abstract»

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  • Analysis of CW Oxygen-Iodine Laser Performance Using Similarity Criteria

    Publication Year: 2013 , Page(s): 739 - 746
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (864 KB) |  | HTML iconHTML  

    A simplified single-frequency two-level model for predicting power extraction from a CW oxygen-iodine laser (OIL) considering relaxation losses has been developed. The model predicts that the energy efficiency of CW OILs with stable resonators depends on three similarity criteria. Criterion γd is the ratio of the residence time of active medium in the resonator to the singlet oxygen O2(1triangle) energy extraction time at an infinite intraresonator intensity. Criterion Π is small-signal gain to the threshold ratio. Criterion Λ is the relaxation to excitation rate ratio for the electronically excited iodine atoms I(2P1/2). The analysis of the calculated and experimental data show that effective power extraction from the CW OIL active medium is achieved when the values of the similarity criteria are in the ranges: γd=4-6, Π = 3-8, and Λ ≤ 0.01. View full abstract»

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  • Photocurrent Calculation of Intersubband Transitions to Continuum-Localized States in GaAs/AlGaAs Multiquantum Wells for Mid-Infrared Photodetector

    Publication Year: 2013 , Page(s): 747 - 752
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (866 KB) |  | HTML iconHTML  

    In this paper, we propose a system based on GaAs heterostructure where it is possible to generate photocurrent with mid-infrared radiation. This system is based on a central quantum well (CQW) embedded in a superlattice. Because of the CQW, which acts as a defect, there are localized states between the mini-bands in the continuum of the conduction band. Unlike the usual systems where the final states are delocalized, the oscillator strength due to the transitions between electrons occupying the ground-state to these continuum-localized states is enhanced. An applied electrical bias mixes the mini-band states with the localized state in the continuum, and due to the combined effects of strong oscillator strength and high transmission coefficients, narrow and sharp peaks are observed in the photocurrent when exciting these final states. We calculate and present results of the absorption and photocurrent for a system built to operate at 4.1 μm and discuss their dependence with the bias applied to the system and with the intensity of the incident radiation. View full abstract»

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  • 512 ,\times, 512 Individually Addressable MWIR LED Arrays Based on Type-II InAs/GaSb Superlattices

    Publication Year: 2013 , Page(s): 753 - 759
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3544 KB) |  | HTML iconHTML  

    Single element 33×33 μm2 InAs/GaSb superlattice light-emitting diodes (SLEDs) operating at 77 K with peak emission at approximately 4.6 μm are demonstrated. A peak radiance of 2.2 W/cm2/sr was measured corresponding to an apparent temperature greater than 1350 K within the 3-5 μm band. A 48 μm pitch, 512 × 512 individually addressable LED array was fabricated from a nominally identical SLED wafer, hybridized with a read-in integrated circuit, and tested. The array exhibited a pixel yield greater than 95%. View full abstract»

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  • Polarization-Dependent Third-Order Optical Nonlinearity of {\rm BaAlBO}_{3}{\rm F}_{2} Crystal

    Publication Year: 2013 , Page(s): 760 - 764
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2581 KB) |  | HTML iconHTML  

    We investigated the third-order optical nonlinearity of a new nonlinear optical crystal BaAlBO3F2 (BABF) using Z-scan technique with a picosecond 532-nm laser. Polarization-dependent nonlinear refractive index γ of the BABF crystal was measured with an a-cut sample and a sample cut along the type I phase-matching angle for third-harmonic-generation of lasers at 1064 nm (THG-cut). Anisotropy was observed with positive γ values in the range of 10-16 cm2/W, indicating self-focusing Kerr effects. The measurements agreed well with the theoretical prediction. The corresponding third-order nonlinear optical susceptibility χeff(3) was estimated to be ~ 10-14 esu. View full abstract»

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  • Spectral Analysis for Velocity Measurement Through Self-Mixing Interferometry

    Publication Year: 2013 , Page(s): 765 - 769
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (901 KB) |  | HTML iconHTML  

    A novel elaboration technique for a self-mixing interferometer is presented. It enables the measurement of speed and direction for a remote target, without using heterodyne detection. The elaboration employs the signal non-linearity for recovering the speed sign directly in the frequency domain. The target speed is measured by the signal frequency, whereas the speed sign is evaluated by the phases of the signal. View full abstract»

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  • In-Situ I\hbox {--}V Measurements of {\rm ZnS}{:}{\rm TiO}_{2}/{\rm p}\hbox {-}{\rm Si} Quantum Dot Heterojunction Photodiode Under 120 MeV {\rm Au}^{9+} Ion Irradiation

    Publication Year: 2013 , Page(s): 770 - 776
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (802 KB) |  | HTML iconHTML  

    The 120 MeV Au9+ ion induced modifications in a ZnS:TiO2/p-Si quantum dot (QD) heterojunction has been studied by In-Situ current-voltage (I-V) measurements. This paper shows that the process of ion irradiation is a novel technique in modifying the electronic properties of QDs based semiconductor heterojunctions. After Au9+ ion irradiation, there is an increase in ideality factor for ZnS:TiO2/p-Si QDs heterojunction at lower fluences and further at higher fluences the ideality factor decreases. In addition, the other parameters like leakage current, series resistance, and reverse saturation current are also affected under the SHI irradiation. In pristine samples, the dependence of the currents under the light illumination shows high photo responsivity. The observed responsivity is 2.7×1010 A/W for ultraviolet light (wavelength 376 nm) at reverse bias voltage 1.5 V. The increase in responsivity to 4.9×1010 A/W is observed after irradiation up to fluence of 3×1013 ions/cm2. View full abstract»

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  • Coupled Transmission Line Model for Planar Metal-Dielectric-Metal Plasmonic Structures: Inclusion of the First Non-Principal Mode

    Publication Year: 2013 , Page(s): 777 - 784
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2464 KB) |  | HTML iconHTML  

    A coupled transmission line model whose parameters are analytically given is provided for fast and accurate analysis of miscellaneous plasmonic structures with metal-dielectric-metal (MDM) arrangement. The coupling of surface plasmons supported by the planar metal-dielectric interfaces is included in the proposed model and thereby the effects of the first non-principal mode of the MDM waveguide are considered. In particular, MDM bends, junctions, and stubs are studied. Using rigorous numerical solutions, e.g., the finite-element method and the finite-difference time-domain, it is shown that the proposed model is accurate in all those cases. View full abstract»

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  • Terahertz Radiation Generated by Laser Induced Plasma in Photoconductive Antenna

    Publication Year: 2013 , Page(s): 785 - 789
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (480 KB) |  | HTML iconHTML  

    To theoretically analyze the spectral characteristics of terahertz (THz) electromagnetic radiation generated by photoconductive antennas, the paper proposed a model by considering laser induced plasma in photoconductive antenna. At a bias voltage, plasma oscillation generates Langmuir wave that propagates in the inhomogeneous plasma in the direction of density gradient, and is converted to THz radiation after a converse zone. The influence factors of the bandwidth and peak frequency are analyzed by the model and testified by experiment. View full abstract»

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  • Low-Frequency Fluctuations in Semiconductor Ring Lasers With Optical Feedback

    Publication Year: 2013 , Page(s): 790 - 797
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2461 KB) |  | HTML iconHTML  

    In this paper, we experimentally and numerically study the dynamics of semiconductor ring lasers that are subjected to long delay and moderate self-feedback. Through varying the pump current or the feedback strength or both, we study the appearance and parameter dependence of low frequency fluctuations in these systems. In particular, we observe different routes to the building up of the initial power amplitude. View full abstract»

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  • Speckle Pattern Errors in Self-Mixing Interferometry

    Publication Year: 2013 , Page(s): 798 - 806
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1075 KB) |  | HTML iconHTML  

    We analyze the random errors occurring in interferometric measurements because of the speckle pattern regime, when the remote target is a diffusing surface. First, we review the statistical properties of speckle and discuss amplitude fading that is affecting the self-mixing interferometer (SMI) signal and methods to alleviate it. Second, we derive intra-speckle phase errors using the bivariate conditional probability, and find that the noise-equivalent-displacement for small displacement Δ is proportional to the ratio of Δ to speckle longitudinal size sl. Last, we extend the analysis to inter-speckle displacements (Δ > s1) and, after deriving speckle systematic and random errors, show that operation up to meters on a diffusing surface target is possible with a small (≈ λ) error. Results are mainly focussed on SMI, yet they have general validity for any configuration of interferometry. View full abstract»

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  • Blank page

    Publication Year: 2013 , Page(s): B807 - B808
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  • IEEE Journal of Quantum Electronics information for authors

    Publication Year: 2013 , Page(s): C3
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  • [Blank page - back cover]

    Publication Year: 2013 , Page(s): C4
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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
Aaron R. Hawkins
Brigham Young University