Zobrazeno 1 - 10
of 103
pro vyhledávání: '"B. F. Levine"'
Publikováno v:
Physics World. 7:35-40
Infrared detectors operating from mid IR wavelengths to very long wavelength IR are of great interest for a variety of ground based and space based applications such as night vision, early warning systems, navigation, flight control systems, weather
Publikováno v:
Journal of Applied Physics. 76:6001-6008
We present an extensive and detailed study of very long wavelength quantum well infrared photodetectors covering the spectral region between 14 and 20 micrometers. Measurements were made on seven different molecular beam epitaxy grown samples having
Autor:
B. F. Levine
Publikováno v:
Journal of Applied Physics. 74:R1-R81
The extensive literature on quantum‐well infrared photodetectors (QWIPs) is reviewed. A detailed discussion is given on the device physics of the intersubband absorption and hot‐carrier transport processes for individual detectors, as well as the
Publikováno v:
Journal of Applied Physics. 74:1826-1831
We have performed an extensive series of measurements on symmetrical barrier bound‐to‐continuum and asymmetrical barrier bound‐to‐bound quantum well infrared photodetectors consisting of only a single well. We find that the behavior of the op
Publikováno v:
Journal of Applied Physics. 74:346-350
An extensive series of measurements and theoretical analysis are presented on an undoped single‐quantum‐well infrared photodetector. The well is filled by electron tunneling through the thin emitter barrier resulting in several novel characterist
Publikováno v:
Journal of Applied Physics. 72:4429-4443
We present a detailed and thorough study of a wide variety of quantum well infrared photodetectors (QWIPs), which were chosen to have large differences in their optical and transport properties. Both n- and p-doped QWIPs, as well as intersubband tran
Publikováno v:
Journal of Applied Physics. 71:5130-5135
The longest-wavelength quantum-well IR photodetector ever achieved, with a cutoff wavelength of 19 microns, is demonstrated. Detailed measurements and an in-depth analysis of the noise, optical gain, detectivity, quantum efficiency, and quantum-well
Publikováno v:
Optics letters. 13(3)
We demonstrate a photon-counting optical-time-domain reflectometer (OTDR) operating at a wavelength of 0.85 microm at room temperature with high sensitivity (3 x 10(-15) W) at high resolution (1.5 cm, 150 psec). Measurements of splice losses and Rayl
Publikováno v:
Journal of Applied Physics. 70:305-308
We have measured and theoretically analyzed the optical absorption and hot electron transport physics of a new long wavelength (λ=5–9 μm) infrared miniband photoconductor based on a GaAs/AlxGa1−x superlattice. The optical absorption photoexcite
Dependence of the performance of GaAs/AlGaAs quantum well infrared photodetectors on doping and bias
Publikováno v:
Journal of Applied Physics. 69:6517-6520
We have measured and theoretically analyzed the doping density, ND, dependence of the intersubband absorption coefficient α, the quantum efficiency η, the optical gain g, the dark current ID, and the detectivity D*. We discuss the optimum doping an