Výsledky vyhledávání

THz response of GaAs/AlGaAs superlattices: from classical to quantum dynamics

Autor: K. D. Maranowski, Arthur C. Gossard, Uddalak Bhattacharya, S. J. Allen, B. J. Keay, Mark J. W. Rodwell, S. Zeuner

Publikováno v: Superlattices and Microstructures. 22:149-154

We have investigated the THz response of a series of GaAs/Al x Ga 1- x As superlattices with a variety of miniband widths. The samples range from the sequential resonant tunneling limit with a very narrow miniband to superlattices with a miniband wid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::705bd5bddff01f6e375930b2d2bfe4c1
https://doi.org/10.1006/spmi.1996.0288

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Virtual states, dynamic localization, absolute negative conductance and stimulated multiphoton emission in semiconductor superlattices

Autor: Uddalak Bhattacharya, S. Zeuner, Arthur C. Gossard, B. J. Keay, K. D. Maranowski, Mark J. W. Rodwell, K. L. Campman, C Aversa, S. J. Allen

Publikováno v: Semiconductor Science and Technology. 11:1596-1600

We report the observation of dynamic localization, absolute negative conductance (ANC) and multiphoton stimulated emission in sequential resonant tunnelling semiconductor superlattice bow-tie antenna coupled to intense terahertz electric fields. Perh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::07e39f956f5b2acd598fa7d18008e966
https://doi.org/10.1088/0268-1242/11/11s/025

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Photon assisted transport through semiconductor quantum structures in intense terahertz electric fields

Autor: B. J. Keay, Uddalak Bhattacharya, Arthur C. Gossard, C. Unterrainer, S. Zeuner, M. C. Wanke, H. Drexler, Mark J. W. Rodwell, K. L. Campman, S. J. Allen, K. D. Maranowski, J. S. Scott, Gilberto Medeiros-Ribeiro

Publikováno v: Physica B: Condensed Matter. 227:367-372

Quantum transport in resonant tunneling diodes, sequential resonant tunneling superlattices and miniband superlattices in the presence of intense terahertz electric fields is marked by new channels opened by the absorption or emission of one or more

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d598f6e08de9cf3a20949925846f6ff7
https://doi.org/10.1016/0921-4526(96)00446-2

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Virtual states and photon-assisted tunneling

Autor: B. J. Keay, C. Aversa

Publikováno v: Physical Review B. 54:R2284-R2287

Perturbation theory is used to understand the transitions that dominate photon-assisted tunneling in coupled quantum-well systems immersed in intense ac fields. In particular, we show that the Bessel functions, widely incorporated into models describ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ceef859fc4e4933df1619400b6ec17e
https://doi.org/10.1103/physrevb.54.r2284

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Multiphoton-assisted tunneling, dynamic localization and absolute negative conductance

Autor: Uddalak Bhattacharya, B. J. Keay, Mark J. W. Rodwell, Arthur C. Gossard, S. J. Allen, K. D. Maranowski

Publikováno v: Surface Science. :176-180

We report the observation of Absolute Negative Conductance (ANC), multiphoton stimulated emission and dynamical localization in sequential resonant tunneling semiconductor superlattices driven by intense terahertz electric fields. With increasing ter

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ee8277778819708846c4aaebc6b5087
https://doi.org/10.1016/0039-6028(96)00370-6

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Dynamic Localization, Absolute Negative Conductance, and Stimulated, Multiphoton Emission in Sequential Resonant Tunneling Semiconductor Superlattices

Autor: B. J. Keay, S. Zeuner, S. J. Allen, Uddalak Bhattacharya, Mark J. W. Rodwell, Arthur C. Gossard, K. D. Maranowski

Publikováno v: Physical Review Letters. 75:4102-4105

We report the first observation of absolute negative conductance and multiphoton stimulated emission in sequential resonant tunneling semiconductor superlattices driven by intense terahertz electric fields. With increasing terahertz field strength th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65e85f7f24d2994291c3b6fbece4e974
https://doi.org/10.1103/physrevlett.75.4102

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Probing terahertz dynamics in semiconductor nanostructures with the UCSB free-electron lasers

Autor: K. Craig, P. F. Hopkins, Arthur C. Gossard, J. S. Scott, C. L. Felix, B. J. Keay, T.Y. Liu, Mark S. Sherwin, M. Lui, G. Ramian, J.P. Kaminski, D. Chow, Andrea Markelz, S. J. Allen, James Heyman, P. Guimara˜es, K. L. Campman

Publikováno v: Scopus-Elsevier

The UCSB free-electron lasers provide kilowatts of continuously tunable radiation from 120 GHz to 4.8 THz. They have the most impact on terahertz science and technology that require a tunable, high power source to explore non-linear dynamics or that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d550c96f41fc8717b8ac551d8a55781b
https://doi.org/10.1016/0022-2313(94)90142-2

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