Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Weng Wah Chow"'
Publikováno v:
Physical Review B. 90
We study theoretically the performance of electrically pumped self-organized quantum dots as a gain material in the mid-IR range at room temperature. We analyze an AlGaAs/InGaAs based structure composed of dots-in-a-well sandwiched between two quantu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72814335e16734f90e45d02a6ffb30dc
https://doi.org/10.1103/physrevb.90.165302
https://doi.org/10.1103/physrevb.90.165302
Publikováno v:
Physical Review B. 60:1947-1952
Microscopic calculations of the absorption/gain and luminescence spectra are presented for wide bandgap Ga{sub 1{minus}x}In{sub x}N/GaN quantum well systems. Whereas structures with narrow well widths exhibit the usual excitation dependent bleaching
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab6ed0cd189af153a7e56cf7389b8c01
https://doi.org/10.1103/physrevb.60.1947
https://doi.org/10.1103/physrevb.60.1947
Publikováno v:
Applied Physics Letters. 82:1673-1675
A microscopic laser theory was used to investigate gain properties in Ga1−xInxNyAs1−y/GaAs quantum wells. We considered combinations of x and y giving laser emission around 1.30 μm. Optical properties affecting laser threshold and dynamical resp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20e138c50f19e1e1f12776a784270975
https://doi.org/10.1063/1.1561154
https://doi.org/10.1063/1.1561154
Vertical-cavity surface-emitting lasers (VCSELs) are well suited for emerging photonic microsystems due to their low power consumption, ease of integration with other optical components, and single frequency operation. However, the typical VCSEL line
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9746b93d52aa36054fa70814b48b5c4d
https://doi.org/10.2172/1029777
https://doi.org/10.2172/1029777
Optical nonlinearities and quantum coherences have the potential to enable efficient, high-temperature generation of coherent THz radiation. This LDRD proposal involves the exploration of the underlying physics using intersubband transitions in a qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::700d64e005a85193e980d74b83592fe9
https://doi.org/10.2172/993319
https://doi.org/10.2172/993319
Autor:
Erik J. Skogen, Joel R. Wendt, James W. Raring, Weng Wah Chow, C. Alford, Mark E. Overberg, Gregory M. Peake, Florante Cajas, Anna Tauke-Pedretti, David Torres, Gregory A. Vawter
This report summarizes a 3-year LDRD program at Sandia National Laboratories exploring mutual injection locking of composite-cavity lasers for enhanced modulation responses. The program focused on developing a fundamental understanding of the frequen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0f38efc3c3779f03dbec24e8cb2a2cd
https://doi.org/10.2172/1007317
https://doi.org/10.2172/1007317
Autor:
Weng Wah Chow
A microscopic theory for investigating quantum-dot optical properties was developed. The theory incorporated advances on various aspects of quantum-dot physics developed at Sandia and elsewhere. Important components are a non-Markovian treatment of p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87c78785ce9bad6cffd5c80d4ab51131
https://doi.org/10.2172/961655
https://doi.org/10.2172/961655
Remote optical detection of molecules, agents, and energetic materials has many applications to national security interests. Currently there is significant interest in determining under what circumstances THz frequency coverage will aid in a complete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0803e3deb69b77e8c984464de6e53e4a
https://doi.org/10.2172/921751
https://doi.org/10.2172/921751
Publikováno v:
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference.
In this paper, the many-body aspects and the differences to the independent-particle treatment of quantum coherence in QDs are discussed. For investigation the semiconductor Bloch equations, modified for a Lambda system, is used. A relatively detaile
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https://explore.openaire.eu/search/publication?articleId=doi_________::10a2b5a17273f2893300195ba9dbd77b
https://doi.org/10.1109/cleoe-iqec.2007.4386116
https://doi.org/10.1109/cleoe-iqec.2007.4386116
A quantum optical approach is proposed and analyzed as a solution to the problem of detecting weak coherent radiation in the presence of a strong incoherent background. The approach is based on the extreme sensitivity of laser dynamical nonlinearitie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59fa3f426bb5cf1062a470ef65d5b2d5
https://doi.org/10.2172/899374
https://doi.org/10.2172/899374