High-Performance Lead Telluride-Based Photodetectors

1994 ◽  
Vol 299 ◽  
Author(s):  
Boris A. Akimov ◽  
Dmitriy R. Khokhlov
Keyword(s):  
High Performance ◽  
Considerable Increase ◽  
Signal To Noise Ratio ◽  
Lead Telluride ◽  
Far Infrared ◽  
Signal Integration ◽  
Group Iii ◽  
New Class ◽  
Physical Evidence ◽  
Nonequilibrium States

AbstractWe present the new class of the far infrared photodetectors based on the lead-tin tellurides doped with the group III impurities. The persistent photoconductivity effect appearing in these materials provides an internal signal integration resulting in a considerable increase in the signal-to-noise ratio. The techniques of the photomemory quenching are discussed. In some regime of quenching the effect of giant quantum efficiency stimulation has been observed. The possibility of generation of the photoinduced spatially nonequilibrium states provides the physical evidence for the construction of an integrating “continuous” focal-plane array based on Pb1−xSnxTe(In).

New Class of the Semiconductor Materials for Infrared Photodetection

1990 ◽  
Vol 216 ◽  
Author(s):  
Boris A. Akimov ◽  
Nikolai B. Brandt ◽  
Sergei N. Chesnokov ◽  
Dmitriy R. Khokhlov
Keyword(s):  
Considerable Increase ◽  
Alloy Composition ◽  
Operation Time ◽  
Integration Time ◽  
Signal Integration ◽  
Persistent Photoconductivity ◽  
Group Iii ◽  
New Class ◽  
Composition Variation ◽  
Time Required

ABSTRACTWe Present the new class of infrared Photodetectors based on the lead-tin tellurides doped with group III impurities. The Persistent photoconductivity effect appearing in these materials provides the opportunity of internal signal integration resulting in the considerable increase in signalto- noise ratio. The integration characteristic time may be changed by means of the operating temperature or alloy composition variation. Even if the integration time is higher than the operation time required there exists an opportunity to quench quickly (∼10−5s) the Persistent photoconductivity. In some regime of quenching the effect of giant quantum efficiency stimulation has been observed. Both the bulk crystal and thin film technologies of the Photodetector Production are developed.

Far-infrared high-performance lead telluride-based photodetectors for spaceborne applications

1998 ◽  
Author(s):  
Dmitriy R. Khokhlov ◽  
Sergei S. Chesnokov ◽  
Dmitriy Dolzhenko ◽  
Ivan I. Ivanchik
Keyword(s):  
High Performance ◽  
Lead Telluride ◽  
Far Infrared

Lead telluride-based far-infrared photodetectors – a promising alternative to doped Si and Ge

2001 ◽  
Vol 692 ◽  
Author(s):  
Dmitriy Dolzhenko ◽  
Ivan Ivanchik ◽  
Dmitriy Khokhlov
Keyword(s):  
State Of The Art ◽  
Lead Telluride ◽  
Far Infrared ◽  
Photon Radiation ◽  
Submillimeter Wavelength ◽  
Promising Alternative ◽  
Group Iii ◽  
Physical Features ◽  
Fast Quenching ◽  
Physical Principles

AbstractDoping of the lead telluride and related alloys with the group III impurities results in appearance of unique physical features of the material, such as persistent photoresponse, enhanced responsive quantum efficiency (up to 100 photoelectrons/incident photon), radiation hardness and many others. We review physical principles of operation of the photodetecting devices based on the group III-doped IV-VI including possibilities of fast quenching of the persistent photoresponse, construction of a focal-plane array, new readout technique, and others. Comparison of performance of the state of the art Ge(Ga) and Si(Sb) photodetectors with their lead telluride-based analogs shows that the responsivity of PbSnTe(In) photodetectors is by several orders of magnitude higher. High photoresponse is detected at the wavelength 116 micrometers in PbSnTe(In), and it is possible that the photoconductivity spectrum covers all the submillimeter wavelength range.

Far infrared high-performance lead telluride-based photodetectors for space-born applications

1994 ◽  
Vol 35 (1) ◽  
pp. 23-31 ◽  
Author(s):  
S.N. Chesnokov ◽  
D.E. Dolzhenko ◽  
I.I. Ivanchik ◽  
D.R. Khokhlov
Keyword(s):  
High Performance ◽  
Lead Telluride ◽  
Far Infrared

New Class of Trimetallic Oxide Hierarchical Mesoporous Array on Woven Fabric: Electrode for high-Performance and Stable battery type Ultracapacitor

2021 ◽  
Vol 35 ◽  
pp. 102249
Author(s):  
S. Thakur ◽  
S. Maiti ◽  
K. Sardar ◽  
N. Besra ◽  
P. Bairi ◽  
...  
Keyword(s):  
High Performance ◽  
Woven Fabric ◽  
New Class

scholarly journals Environmentally Friendly, High-Performance Fire Retardant Made from Cellulose and Graphite

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2400
Author(s):  
Leandra P. Santos ◽  
Douglas S. da Silva ◽  
Thais H. Morari ◽  
Fernando Galembeck
Keyword(s):  
High Performance ◽  
Raw Materials ◽  
Fire Retardant ◽  
Visual Observation ◽  
Flame Resistance ◽  
New Developments ◽  
New Class ◽  
New Material ◽  
Accredited Laboratory ◽  
Materials Used

Many materials and additives perform well as fire retardants and suppressants, but there is an ever-growing list of unfulfilled demands requiring new developments. This work explores the outstanding dispersant and adhesive performances of cellulose to create a new effective fire-retardant: exfoliated and reassembled graphite (ERG). This is a new 2D polyfunctional material formed by drying aqueous dispersions of graphite and cellulose on wood, canvas, and other lignocellulosic materials, thus producing adherent layers that reduce the damage caused by a flame to the substrates. Visual observation, thermal images and surface temperature measurements reveal fast heat transfer away from the flamed spots, suppressing flare formation. Pinewood coated with ERG underwent standard flame resistance tests in an accredited laboratory, reaching the highest possible class for combustible substrates. The fire-retardant performance of ERG derives from its thermal stability in air and from its ability to transfer heat to the environment, by conduction and radiation. This new material may thus lead a new class of flame-retardant coatings based on a hitherto unexplored mechanism for fire retardation and showing several technical advantages: the precursor dispersions are water-based, the raw materials used are commodities, and the production process can be performed on commonly used equipment with minimal waste.

A three-dimensional hierarchical Fe2O3@NiO core/shell nanorod array on carbon cloth: a new class of anode for high-performance lithium-ion batteries

Nanoscale ◽  
2013 ◽  
Vol 5 (17) ◽  
pp. 7906 ◽  
Author(s):  
Qin-qin Xiong ◽  
Jiang-ping Tu ◽  
Xin-hui Xia ◽  
Xu-yang Zhao ◽  
Chang-dong Gu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Nanorod Array ◽  
Core Shell ◽  
Carbon Cloth ◽  
New Class

Low cost, high performance far infrared microbolometer

2010 ◽  
Author(s):  
Audun Roer ◽  
Adriana Lapadatu ◽  
Anders Elfving ◽  
Gjermund Kittilsland ◽  
Erling Hohler
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Far Infrared

A High-Performance Signal Processing System for Monopulse Tracking Radar

2011 ◽  
Vol 383-390 ◽  
pp. 471-475
Author(s):  
Yong Bin Hong ◽  
Cheng Fa Xu ◽  
Mei Guo Gao ◽  
Li Zhi Zhao
Keyword(s):  
Signal Processing ◽  
High Performance ◽  
Dynamic Range ◽  
Signal To Noise Ratio ◽  
Processing System ◽  
Digital Signal ◽  
Radar Signal ◽  
Signal Processing System ◽  
Parallel Pipelined ◽  
Tracking Radar

A radar signal processing system characterizing high instantaneous dynamic range and low system latency is designed based on a specifically developed signal processing platform. Instantaneous dynamic range loss is a critical problem when digital signal processing is performed on fixed-point FPGAs. In this paper, the problem is well resolved by increasing the wordlength according to signal-to-noise ratio (SNR) gain of the algorithms through the data path. The distinctive software structure featuring parallel pipelined processing and “data flow drive” reduces the system latency to one coherent processing interval (CPI), which significantly improves the maximum tracking angular velocity of the monopulse tracking radar. Additionally, some important electronic counter-countermeasures (ECCM) are incorporated into this signal processing system.

Event-Locked Time-Resolved Fourier Spectroscopy

1997 ◽  
Vol 51 (8) ◽  
pp. 1106-1112 ◽  
Author(s):  
H. Weidner ◽  
R. E. Peale
Keyword(s):  
Signal To Noise Ratio ◽  
Low Cost ◽  
Michelson Interferometer ◽  
Far Infrared ◽  
Time Base ◽  
The Novel ◽  
Time Resolved ◽  
Mathematical Algorithm ◽  
Scan Time ◽  
Recorded Data

A low-cost method of adding time-resolving capability to commercial Fourier transform spectrometers with a continuously scanning Michelson interferometer has been developed. This method is specifically designed to eliminate noise and artifacts caused by mirror-speed variations in the interferometer. The method exists of two parts: (1) a novel timing scheme for synchronizing the transient events under study and the digitizing of the interferogram and (2) a mathematical algorithm for extracting the spectral information from the recorded data. The novel timing scheme is a modification of the well-known interleaved, or stroboscopic, method. It achieves the same timing accuracy, signal-to-noise ratio, and freedom from artifacts as step-scan time-resolving Fourier spectrometers by locking the sampling of the interferogram to a stable time base rather than to the occurrences of the HeNe fringes. The necessary pathlength-difference information at which samples are taken is obtained from a record of the mirror speed. The resulting interferograms with uneven pathlength-difference spacings are transformed into wavenumber space by least-squares fits of periodic functions. Spectra from the far-infrared to the upper visible at resolutions up to 0.2 cm−1 are used to demonstrate the utility of this method.

Sign in / Sign up

Export Citation Format

Share Document