Zobrazeno 1 - 10
of 50
pro vyhledávání: '"77"'
Publikováno v:
SPIE Proceedings.
This paper reports a study of Shockley-Read-Hall, radiative, and Auger recombination processes in a series of molecular beam epitaxy grown InAs/InAsSb mid-wavelength infrared and long-wavelength infrared type-II superlattice samples using temperature
Autor:
Oray Orkun Cellek, Elizabeth H. Steenbergen, Blair C. Connelly, Michael Wraback, Grace D. Metcalfe, Said Elhamri, A. W. K. Liu, Dmitri Lubyshev, Hongen Shen, Yong-Hang Zhang, Joel M. Fastenau, Yueming Qiu
Publikováno v:
SPIE Proceedings.
Temperature-dependent minority carrier lifetimes of InAs/InAs1-xSbx type-II superlattices are presented. The longest lifetime at 11 K is 504 ± 40 ns and at 77 K is 412 ± 25 ns. Samples with long periods and small wave function overlaps have both no
Autor:
Sam A. Keo, Sarath D. Gunapala, Arezou Khoshakhlagh, David Z. Ting, Alexander Soibel, Cory J. Hill, Linda Höglund
Publikováno v:
SPIE Proceedings.
In this paper, the relation between the photoluminescence (PL) intensity and the PL peak wavelength was studied. A linear decrease of the PL intensity with increasing cut-off wavelength of long wavelength infrared CBIRDs was observed at 77 K and the
Autor:
Jarrod Vaillancourt, Xuejun Lu
Publikováno v:
SPIE Proceedings.
We report a very longwave Infrared (> 14 μm) quantum dot photodetector working at 77 K. Very longwave infrared (VLWIR) detection at a cut-off wavelength of 15.3 μm was achieved through QD size engineering. Peak specific photodetectivity D* of 3.3x1
Publikováno v:
Novel In-Plane Semiconductor Lasers XX.
Step-taper active-region (STA) quantum cascade lasers (QCLs) allow for both carrier-leakage suppression and fast, miniband-like lower-laser (ll) level depopulation. That has led to an internal-efficiency value of ~ 77 % for ~ 5 μmemitting devices, a
Publikováno v:
SPIE Proceedings.
Medium- and long-wavelength infrared (MWIR and LWIR) Hg1-xCdxTe photodiodes (x equals 0.265 - 0.295, 0.205 - 0.220) for 3 - 5-micrometer and 8 - 12- micrometer wavelength spectral regions were fabricated by arsenic diffusion from the vapor source int
Autor:
Andreas Wörl, Frank Rutz, Volker Daumer, Robert Rehm, T. Stadelmann, R. Müller, Jasmin Niemasz
Publikováno v:
International Conference on Space Optics — ICSO 2018.
Type-II superlattices (T2SLs) are currently recognized as the sole material system offering comparable performance to HgCdTe, yet providing higher operability, stability over time, spatial uniformity, scalability to larger formats, producibility and
Autor:
Shekhar Guha
Publikováno v:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII.
ZnGeP2 is one of the most useful nonlinear optical crystals for generation of high power and high energy infrared radiation in the 2 to 8 m spectral range because of its high nonlinear coefficient along with high thermal conductivity. Growth techn
Publikováno v:
Infrared Technology and Applications XLII.
We report on the development of dual-band InAs/GaSb type-II strained layer superlattices (T2SL) detectors with barrier designs at SK Infrared. Over the past five years, we demonstrated mid-wave/long-wave (MW/LWIR, cut-off wavelengths are 5 μm and 10
Publikováno v:
SPIE Proceedings.
The performance of a solid-state optical refrigerator is the result of a complex interplay of numerous optical and thermal parameters. We present a first preliminary study of an optical cryocooler using ray-tracing techniques. A numerical optimizatio