1350-4495/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.infrared.2009.09.002 * Corresponding author. E-mail address: [email protected] (A.G.U. Perera). 1 Also at NDP optronics LLC. A dual-band (two-color) tunneling-quantum dot infrared photodetector (T-QDIP) structure, which provides wavelength selectivity using bias voltage polarity, is reported. In this T-QDIP, photoexcitation takes pla...

The problem of time delay in tunneling ionization is revisited. origin at the tunnel exit analysed, underlining two faces concept tunnelling delay: around and asymptotic a detector. We show that former delay, sense peak wavefunction, exists as matter principle arises due to sub-barrier interference reflected transmitted components electronic wavepacket. exemplify this by describing an electron ...

We explore InAs/InAsSb type-II superlattice long wavelength infrared detector based focal plane arrays for potential NASA land imaging applications. used the complementary barrier (CBIRD) architecture with p-type absorber (p-CBIRD), and a combination of n-type absorbers (pn-CBIRD). CBIRD fabricated using conventional process an alternative silicon-on-silicon have both demonstrated good operabil...

phase sensitive detector described here has two principal applications: a- to produce a d.c out put proportional to- the amplitude of an incoming a,c signal and indicate, by the outut polarity, the phase of the signal with respect to an internal reference. b- to detect the presence of a signal of known phase and frequency which would otherwise be lost in «background noise» and to measure its am...

Schottky CdTe X-ray detectors exhibit excellent spectroscopic performance but suffer from instabilities. Hence it is of extreme relevance to investigate their electrical properties. A systematic study of the electric field distribution and the current flowing in such detectors under optical perturbations is presented here. The detector response is explored by varying experimental parameters, su...

in this paper a new algorithm is presented for coherent radar detection of targets, when distribution of the interference (clutter and noise) is non-gaussian. the neyman-pearson criterion is used for optimal detection and several successive received samples from a radar range cell are used for detection in the same cell. on the basis of recent empirical evidences, the interference distribution ...

Results are reported on p-GaAs homojunction interfacial work function internal photoemission far infrared ~HIWIP FIR! detectors with a ;10 cm carbon doped single emitter and a barrier layer for three different barrier thicknesses. A remarkably high quantum efficiency with low dark current and an increased responsivity were observed for devices with 1-, 0.1-, and 4-mm-thick barrier regions. The ...