Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Vladimir A. Smagley"'
Autor:
Michael Humphreys, Matthias Schlich, Erin M. Elliott, Vladimir A. Smagley, Uday Mathur, Sanjay Gangadhara
Publikováno v:
Photonic Instrumentation Engineering VII.
For many optical applications, we need more efficient ways to create complete models of the system performance, including optical, thermal, and structural effects. Current models are difficult to create and prone to error. More efficient methods woul
Autor:
Sven Kiontke, Alison Yates, Ulrike Fuchs, Vladimir A. Smagley, Sanjay Gangadhara, Elizabeth Goodwin
Publikováno v:
Imaging and Applied Optics 2015.
We present designs using a 2-D freeform surface based on Chebyshev polynomials, whose description have been incorporated into Zemax OpticStudio. The designs analyzed include a reflector for generating uniform illumination as well as a TMA telescope.
Self-consistent calculation of current self-distribution effect in GaAs-AlGaAs oxide-confined VCSELs
Autor:
Brian P. Riely, Vladimir A. Smagley, Petr G. Eliseev, Marek Osinski, Min Lu, George J. Simonis, Gennady A. Smolyakov, P.H. Shen
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 9:1422-1430
A three-dimensional electrical-thermal-optical numerical solver is applied to model GaAs-AlGaAs-based top-emitting oxide-confined vertical-cavity surface-emitting lasers (VCSELs) with GaAs multiple-quantum-well active region. Continuous-wave mode of
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 7:270-279
A three-dimensional electrical-thermal-optical numerical simulator is developed and applied to model group-III-nitride-based intracavity-contacted vertical-cavity surface-emitting lasers with InGaN multiquantum-well active region. The optical model b
Publikováno v:
Journal of Crystal Growth. :803-807
Results of our comprehensive studies of Nichia blue and green SQW LEDs are presented. These include measurements of the emission spectra over a wide range of currents, temperatures, and pressures. The observed anomalous blue shift with temperature an
Autor:
Robert B. Caldwell, Vladimir A. Smagley, Hai Ling, Marcita Benavidez, Chiyu Liu, Gennady A. Smolyakov, Hongjun Cao, Hui Deng, Marek Osinski, Gregory M. Peake, Petr G. Eliseev
Publikováno v:
IEEE Photonics Technology Letters. 17:282-284
Semiconductor lasers with monolithically integrated ring cavities exceeding 1 cm in perimeter were fabricated and characterized optically and electrically. Directional switching was observed, influenced by S-section seeding of unidirectional operatio
Autor:
Marek Osinski, Tengiz Svimonishvili, Wlodzimierz Nakwaski, Gennady A. Smolyakov, Vladimir A. Smagley, P. Maćkowiak
Publikováno v:
IEEE Photonics Technology Letters. 13:687-689
The Deal-Grove model of thermal oxidation kinetics is adapted to cylindrically symmetric mesa structures and applied to study steam oxidation of AlAs. Oxidation process parameters are extracted from available experimental data as functions of tempera
Autor:
Luke F. Lester, Chiyu Liu, A.L. Gray, Hongjun Cao, Hai Ling, Hui Deng, Petr G. Eliseev, Marek Osinski, Gennady A. Smolyakov, Robert B. Caldwell, Vladimir A. Smagley
Publikováno v:
(CLEO). Conference on Lasers and Electro-Optics, 2005..
First monolithically integrated ridge-waveguide InAs/InGaAs quantum-dot ring lasers are fabricated and characterized. Enhanced by a forward biased S-section waveguide, stable traveling-wave (unidirectional) operation with record suppression ratio of
Autor:
Piotr Perlin, Philippe Sartori, Petr G. Eliseev, Vladimir A. Smagley, Michael Banas, Marek Osinski, Jian Mu
Publikováno v:
Applied Physics Letters. 69:1680-1682
Electrical and optical properties of Nichia double‐heterostructure blue light‐emitting diodes, with In0.06Ga0.94N:Zn, Si active layer, are investigated over a wide temperature range from 10 to 300 K. Current–voltage characteristics have complex
Publikováno v:
SPIE Proceedings.
The role of metal apertures in the mechanism of lateral mode confinement in vertical-cavity surface-emitting lasers (VCSELs) is clarified by means of a detailed effective-frequency-method analysis of an oxide-confined VCSEL structure with the radius