Preliminary radiation tests of hydrogenated amorphous silicon n–i–p photodiodes deposited on a coated glass substrate are presented in this paper. These tests have been performed using a 24GeV proton beam. We report results on the fluence dependence of the diode dark current and of the signal induced by a proton spill.

A submicron pixel's light and dark performance were studied by experiment and simulation. An advanced node technology incorporated with a stacked CMOS image sensor (CIS) is promising in that it may enhance performance. In this work, we demonstrated a low dark current of 3.2 e-/s at 60 °C, an ultra-low read noise of 0.90 e-·rms, a high full well capacity (FWC) of 4100 e-, and blooming of 0.5% in...

Field spectroradiometers integrated in automated systems at Eddy Covariance (EC) sites are a powerful tool for monitoring and upscaling vegetation physiology and carbon and water fluxes. However, exposure to varying environmental conditions can affect the functioning of these sensors, especially if these cannot be completely insulated and stabilized. This can cause inaccuracy in the spectral me...

InAs/GaSb type-II strained-layer superlattice (SLS) photovoltaic infrared (IR) detectors are currently of great interest for midand long-wave IR detection. A novel technique of reducing detector dark current by inserting resonant tunnelling barriers into a conventional InAs/GaSb SLS is investigated. The GaSb/InAs/GaSb resonant tunnelling double barrier heterostructure was designed to be periodi...

We determine the reliability exponent ( ) of the Anantharam–Verdú exponential server timing channel with service rate for all rates between a critical rate = ( 4) log 2 and the channel capacity = 1 . For rates between 0 and , we provide a random-coding lower bound ( ) and a sphere-packing upper bound ( ) on ( ). We also determine that the cutoff rate 0 for this channel equals 4, thus answering ...

We study the discrete-time Poisson channel under the constraint that its average input power (in photons per channel use) must not exceed some constant E . We consider the wideband, high-photonefficiency extreme where E approaches zero, and where the channel’s “dark current” approaches zero proportionally with E . Improving over a previously obtained first-order capacity approximation, we deriv...

In this work an analytical modeling of p+-Hg0.81Cd0.19Te/n0-Hg0.81Cd0.19Te/CdZnTe, homojunction photodetector has been analyzed theoretically at 77K. A generic model of HgCdTe based photovoltaic detector has been developed using the closed form equations. Device parameters are obtained of the proposed photodetector and studied in terms of dark current, resistance area-product, quantum efficienc...

The DAMA/Libra experiment has recently confirmed the annual modulation signal obtained in the earlier DAMA/NaI experiment, providing strong evidence that they have actually detected dark matter. We examine the implications of this experiment for the mirror dark matter candidate. We show that mirror dark matter successfully explains the latest DAMA/Libra data, whilst also being consistent with t...

We exhibit upper and lower bounds on the pairwise error probability of the exponential-server timing channel in terms of an appropriately-defined distance between codewords. We show that this distance plays a crucial role in determining the reliability function at low rates. In particular, by lower bounding the minimum distance of good low-rate codes, we provide an improved lower bound on the r...

Mirror matter is an entirely new form of matter predicted to exist if mirror symmetry is a fundamental symmetry of nature. Mirror matter has the right broad properties to explain the inferred dark matter of the Universe and might also be responsible for a variety of other puzzles in particle physics, astrophysics, meteoritics and planetary science. It is known that mirror matter can interact wi...