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Autor:
K. K. Law, K. W. Eric Cheng
Publikováno v:
International Journal of Circuit Theory and Applications. 36:839-855
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b5381fa28593be501a2a5ee2f9572ec
https://doi.org/10.1002/cta.462
https://doi.org/10.1002/cta.462
Autor:
K. K. Law
Publikováno v:
SPIE Proceedings.
Many advances have been made recently in mid-wave infrared and long-wave infrared quantum cascade lasers (QCLs) technologies, and there is an increasing demand for these laser sources for ever expanding Naval, DoD and homeland security applications.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16db70d2d0384ca120e66754828af1f6
https://doi.org/10.1117/12.2047371
https://doi.org/10.1117/12.2047371
Autor:
K.-K. Law
Publikováno v:
Optics Communications. 118:615-618
The optical characteristics of an absorption-tunable Fabry-Perot etalon coupled with a passive non-tunable etalon are analyzed. The effects of additional optical feedback due to coupling from the passive cavity on the resonance optical bandwidth dete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a43ed5efe06b2ee8c6ba992f7dc878f
https://doi.org/10.1016/0030-4018(95)00292-g
https://doi.org/10.1016/0030-4018(95)00292-g
Autor:
K.-K. Law
Publikováno v:
Optics Communications. 108:8-12
Reported is a mathematical analysis and derivation of a formula for the change of reflectivity of a quarter-wave distributed Bragg reflector (DBR) owing to weak absorption in the mirror layers. From the analysis, the individual contribution of each a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff8eddef5495db668abbc3d14bfabb36
https://doi.org/10.1016/0030-4018(94)90207-0
https://doi.org/10.1016/0030-4018(94)90207-0
Autor:
Yuval Garini, Arthur C. Gossard, Eitan Ehrenfreund, James L. Merz, Arza Ron, K.-K. Law, E. Cohen
Publikováno v:
Solid-State Electronics. 37:1199-1202
We present a study of the e 1- e 2 intersubband absorption in modulation doped GaAs/Al 0.3 Ga 0.7 As MQW's that are photoexcited by interband radiation. A comprehensive study of the photoinduced absorption (PIA) strength as a function of exciting (la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73a50b6efe0036b9aeebc1a70c02db35
https://doi.org/10.1016/0038-1101(94)90388-3
https://doi.org/10.1016/0038-1101(94)90388-3
Autor:
K.-K. Law, Dubravko Babic
Publikováno v:
IEEE Photonics Technology Letters. 5:1294-1297
The authors derive an analytical formula for the change of propagation delay and phase penetration depth of a quarter-wave distributed Bragg reflector (DBR) owing to thickness and/or composition variations. The analytical expression provides a very g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9476e2fd5a6348bed09173dd8546143
https://doi.org/10.1109/68.250048
https://doi.org/10.1109/68.250048
Autor:
James L. Merz, Yuval Garini, Eitan Ehrenfreund, K.-K. Law, Arthur C. Gossard, Arza Ron, E. Cohen
Publikováno v:
Physical Review B. 48:4456-4459
We identify long-lived photoexcited electrons in modulation-doped GaAs/${\mathrm{Al}}_{0.3}$${\mathrm{Ga}}_{0.7}$As quantum wells by studying the effect of interband excitation on the electron intersubband absorption. The lifetime of these electrons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45759a3b7a149b0718993c0d8629e4d0
https://doi.org/10.1103/physrevb.48.4456
https://doi.org/10.1103/physrevb.48.4456
Publikováno v:
IEEE Journal of Quantum Electronics. 29:2097-2102
Top-driven lasers have been fabricated by impurity-induced disordering (IID). Compared with conventional top-driven lasers, that is, transverse-junction-stripe (TJS) lasers, the top-driven IID (TID) lasers are unique in that the carriers in the activ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b51876fec0262c7736c93979911c95a
https://doi.org/10.1109/3.234474
https://doi.org/10.1109/3.234474
Publikováno v:
IEEE Journal of Quantum Electronics. 29:727-740
The surface-normal asymmetric Fabry-Perot reflection modulators discussed are based on the electroabsorption stemming from the effective absorption edge blue shift caused by Wannier-Stark localization in superlattices. Due to the modulator's normally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3ef33e94f868109f846bcf6e7e59d8d
https://doi.org/10.1109/3.199325
https://doi.org/10.1109/3.199325