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An inter-subband device with terahertz applications

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6 Author(s)
Buckle, P.D. ; Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK ; Dawson, P. ; Lynch, M.A. ; Chun-Yi Kuo
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A theoretical analysis of a modulator based on two coupled resonators is presented in this paper. This modulator exhibits a resonant enhancement in its response. It is used as a component of tunneling structures designed for operation at terahertz frequencies; unlike conventional resonant tunneling structures, these use triple barriers. Data from optical and electrical measurements on a series of devices based on one design of a triple-barrier tunneling structure have been analyzed to estimate their behavior at frequencies over 1 THz. The analysis gives values for the resonantly enhanced admittance, its bandwidth, the bias-frequency relationship, and the requirements for a matching circuit to a 50-Ω environment. The results show that one existing structure might be used in oscillators working at 1 THz

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:48 ,  Issue: 4 )