Terahertz Detection with δ-Doped GaAs/AlAs Multiple Quantum Wells
نویسندگان
چکیده
منابع مشابه
Optimizing terahertz emission from double quantum wells
The terahertz (THz) radiation emitted from a double quantum well is investigated and optimized. Exploiting the phenomenon of quantum stochastic resonance (whereby the oscillation amplitude of a dissipative two-level system exhibits at low temperatures a non-monotonic response with respect to the parameters of a monochromatic external field or the strength of dissipation) to drive a series of id...
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S. G. Carter,1,* V. Ciulin,1,† M. Hanson,2 A. S. Huntington,2,‡ C. S. Wang,3 A. C. Gossard,2,3 L. A. Coldren,2,3 and M. S. Sherwin1 1Physics Department and iQUEST, University of California, Santa Barbara, California 93106, USA 2Materials Department, University of California, Santa Barbara, California 93106, USA 3Electrical and Computer Engineering Department, University of California, Santa Bar...
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We report on the observation of the Ising quantum Hall ferromagnet with Curie temperature T(C) as high as 2 K in a modulation-doped (Cd,Mn)Te heterostructure. In this system field-induced crossing of Landau levels occurs due to the giant spin-splitting effect. Magnetoresistance data, collected over a wide range of temperatures, magnetic fields, tilt angles, and electron densities, are discussed...
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Ultrafast carrier dynamics in InGaN/GaN multiple quantum wells is measured by time-resolved terahertz spectroscopy. The built-in piezoelectric field is initially screened by photoexcited, polarized carriers, and is gradullay restored as the carriers recombine. We observe a nonexponential decay of the carrier density. Time-integrated photoluminescence spectra have shown a complete screening of t...
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Doping, alloying, and combining traditional semiconductors are at the core of today’s technologies, including computers, laser diodes, and smart phones.[1–3] Over the last few decades, considerable progress has been made in the growth and basic studies of individual nanoobjects such as quantum dots,[4] carbon nanotubes,[5,6] graphene,[7,8] and transition metal dichalcogenides.[9,10] Combining a...
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ژورنال
عنوان ژورنال: Acta Physica Polonica A
سال: 2008
ISSN: 0587-4246,1898-794X
DOI: 10.12693/aphyspola.113.909