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Approaching the Quantum Limit of Photodetection in Solid-State Detectors with Internal Signal Amplification.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Approaching the Quantum Limit of Photodetection in Solid-State Detectors with Internal Signal Amplification./
Author:	Hall, David.
Description:	1 online resource (135 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-12(E), Section: B.
Contained By:	Dissertation Abstracts International78-12B(E).
Subject:	Electrical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780355097160

Approaching the Quantum Limit of Photodetection in Solid-State Detectors with Internal Signal Amplification.
Hall, David.

Approaching the Quantum Limit of Photodetection in Solid-State Detectors with Internal Signal Amplification. - 1 online resource (135 pages)

Source: Dissertation Abstracts International, Volume: 78-12(E), Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2017.

Includes bibliographical references

This thesis offers three physical device concepts to overcome limitations in conventional solid-state photodetectors. Tradeoff between sensitivity, bandwidth and dynamic range is a pressing issue for detectors that must meet the demands of imaging and communications applications. Single photon sensitivity has long been possible in a solid-state detector, but with no dynamic range at the device level, and bandwidth on the order of 10 MHz, far below the requirements for modern communications. Detectors reaching 40 GHz bandwidth and exceeding 20 dB dynamic range are now in wide use, but the fundamental physics of these devices limits the sensitivity to only 1000 photons in practical operating conditions. This thesis presents theoretical and experimental progress in three main thrusts that are promising in developing a detector that can maintain large dynamic range and high bandwidth while reaching the ultimate sensitivity limit of a single photon.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355097160Subjects--Topical Terms:

596380
Electrical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Approaching the Quantum Limit of Photodetection in Solid-State Detectors with Internal Signal Amplification.
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245 1 0 $a Approaching the Quantum Limit of Photodetection in Solid-State Detectors with Internal Signal Amplification.
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300 $a 1 online resource (135 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 78-12(E), Section: B.
500 $a Adviser: Yu-Hwa Lo.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2017.
504 $a Includes bibliographical references
520 $a This thesis offers three physical device concepts to overcome limitations in conventional solid-state photodetectors. Tradeoff between sensitivity, bandwidth and dynamic range is a pressing issue for detectors that must meet the demands of imaging and communications applications. Single photon sensitivity has long been possible in a solid-state detector, but with no dynamic range at the device level, and bandwidth on the order of 10 MHz, far below the requirements for modern communications. Detectors reaching 40 GHz bandwidth and exceeding 20 dB dynamic range are now in wide use, but the fundamental physics of these devices limits the sensitivity to only 1000 photons in practical operating conditions. This thesis presents theoretical and experimental progress in three main thrusts that are promising in developing a detector that can maintain large dynamic range and high bandwidth while reaching the ultimate sensitivity limit of a single photon.
520 $a The first device covered is a device which incorporates multiple gain mechanisms in a single device. Rather than relying solely on avalanche gain, this device incorporates bipolar gain which relaxes the excess noise burden experienced by conventional avalanche detectors. Negative feedback is also shown to play a role in regulating the gain and reducing noise.
520 $a The second and third device concepts utilize localized states in disordered material to exploit a host of physical phenomena. Localized states are known to increase carrier excitation probability by relaxing the k-selection rule of momentum conservation. Auger excitation and electron phonon coupling play a role in this new internal signal amplification mechanism, called Cycling Excitation Processes (CEP).
520 $a CEP is first presented in crystalline silicon, where localization is achieved through heavy doping and partial compensation. Impressive performance in terms of gain, responsivity and noise are promising for realizing the goal of a next generation solid-state detector approaching the quantum limit.
520 $a Despite the merits, CEP in crystalline silicon suffers from high dark current due to heavy doping. Amorphous silicon is presented as an alternative means of achieving localization to realize CEP. High speed and high sensitivity capability is demonstrated. While the work is ongoing as of the writing of this thesis, a clear research plan is in place for realizing an amorphous silicon CEP detector capable of high bandwidth and single photon detection.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Electrical engineering. $3 596380
650 4 $a Nanotechnology. $3 557660
650 4 $a Engineering. $3 561152
655 7 $a Electronic books. $2 local $3 554714
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710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of California, San Diego. $b Electrical Engineering (Nanoscale Device and Systems). $3 1191381
773 0 $t Dissertation Abstracts International $g 78-12B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10281634 $z click for full text (PQDT)