Zobrazeno 1 - 10
of 22
pro vyhledávání: '"K. A. Olver"'
Publikováno v:
Infrared Physics & Technology. 94:118-125
We are developing small pixel 12-μm pitch resonator-QWIPs for infrared imaging at 8 μm and 10 μm. The materials and geometries are designed to yield 44% quantum efficiency (QE) at 1.0 × 1018 cm−3 doping and 56% at 1.2 × 1018 cm−3 for the 8
Autor:
K. A. Olver, Jonathan Schuster, Stephen Kelley, Antonio Llopis-Jepsen, Quigui Zhou, Michael Wraback, J. Smith, Anand V. Sampath, Yang Shen, Joe C. Campbell
Publikováno v:
2020 IEEE Photonics Conference (IPC).
Homojunction device architectures are explored through numerical simulations to extend the response of 4H-SiC APDs broadly throughout the UV spectrum. We report on device designs and experimental validation of approaches to improve both surface and b
Publikováno v:
Infrared Sensors, Devices, and Applications VIII.
We recently proposed a resonator structure to increase the quantum efficiency (QE) of a quantum well infrared photodetector (QWIP). In this detector systematic parameter study, we have selected two active layer thicknesses, three detector sizes, and
Publikováno v:
SPIE Proceedings.
The infrared absorption of SF6 gas is of narrowband and peaks at 10.6μm. This narrow band absorption posts a stringent requirement on the corresponding sensors as they need to collect enough signal from this limited spectral range to maintain a high
Publikováno v:
Applied optics. 56(3)
We are developing resonator-quantum well infrared photodetectors (R-QWIPs) for long-wavelength applications. Detector pixels with 25 μm pitch were hybridized to fan-out circuits for radiometric measurements. With a moderate doping of 0.5×10sup18/su
Publikováno v:
Infrared Technology and Applications XLII.
We are developing resonator-QWIPs for long wavelength applications. Detector pixels with 25 μm pitch were hybridized to fanout circuits for radiometric measurements. With a moderate doping of 0.5 x 1018 cm-3, we achieved a quantum efficiency of 37%
Publikováno v:
International Journal of Optics, Vol 2012 (2012)
We present computational and experimental results of dust particles that can be tuned to preferentially reflect or emit IR radiation within the 8–14 μm band. The particles consist of thin metallic subwavelength gratings patterned on the surface of
Autor:
Jerry R. Meyer, Igor Vurgaftman, Joseph G. Tischler, William E. Tennant, K. A. Olver, Chadwick L. Canedy, S. P. Powell, Edward H. Aifer, Jeffrey H. Warner, Eric M. Jackson
Publikováno v:
Journal of Electronic Materials. 39:1070-1079
Shallow-etch mesa isolation (SEMI) of graded-bandgap “W”-structured type II superlattice (GGW) infrared photodiodes provides a powerful means for reducing excess dark currents due to surface and bulk junction related processes, and it is particul
Autor:
Edward H. Aifer, William E. Tennant, Jerry R. Meyer, Jeffrey H. Warner, K. A. Olver, Igor Vurgaftman, Eric M. Jackson, Joseph G. Tischler, Chadwick L. Canedy, S. P. Powell
Publikováno v:
Infrared Physics & Technology. 52:326-334
Limiting the defect-mediated dark currents in type-II superlattice (T2SL) IR photodiodes remains the key challenge to focal plane arrays (FPAs) based on this material system. In spite of its larger effective mass to suppress tunneling and more than a
Publikováno v:
SPIE Proceedings.
Recently, we have developed a new detector structure, which is known as the resonator- QWIP or R-QWIP. With the new structure, we demonstrated quantum efficiency (QE) as high as 70% in single detectors and 30 - 40% in focal plane arrays (FPAs) with 9