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Time-resolved electronic capture in germanium doped with hydrogen-like impurity centers

Deßmann, Nils and Pavlov, Sergey and Shastin, V. N. and Zhukavin, Roman and Winnerl, Stephan and Mittendorff, Martin and Hübers, Heinz-Wilhelm (2013) Time-resolved electronic capture in germanium doped with hydrogen-like impurity centers. DPG-Frühjahrstagung der Sektion Kondensierte Materie, 10.-15. März 2013, Regensburg.

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The availability of intense short-pulsed THz radiation from sources such as free electron lasers (FELs) or synchrotrons demands broad-band detectors with very short response times. This triggered a renewed interest in fast germanium (Ge) detectors. The fastest operation of Ge detectors demonstrated in the THz region of the electromagnetic spectrum so far showed an about 2-ns long decay time using highly compensated neutron transmutated p-Ge:Ga:As:Sb. The short-pulse narrow-band FEL radiation allows studying impurity photoconductivity kinetics and provides information important for optimizing the speed of response of extrinsic photoconductors. The capture of free holes and electrons in Ge doped by gallium (Ga) or antimony (Sb) has been studied by a time-resolved pump-probe experiment with the FEL FELBE at the HZDR. For Ga acceptors the relaxation times decrease with increasing pump power from approximately 3 ns to 1 ns (2 ns and 1 ns for Sb donors, respectively). The results support the development of fast photoconductive detectors in the THz region of the spectrum.

Item URL in elib:https://elib.dlr.de/81724/
Document Type:Conference or Workshop Item (Speech)
Title:Time-resolved electronic capture in germanium doped with hydrogen-like impurity centers
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Deßmann, Nilsnils.dessmann (at) dlr.deUNSPECIFIED
Pavlov, SergeySergeij.Pavlov (at) dlr.deUNSPECIFIED
Shastin, V. N.shastin (at) ipm.sci-nnov.ruUNSPECIFIED
Zhukavin, Romanzhur (at) ipm.sci-nnov.ruUNSPECIFIED
Winnerl, Stephans.winnerl (at) hzdr.deUNSPECIFIED
Mittendorff, Martinm.mittendorff (at) hzdr.deUNSPECIFIED
Hübers, Heinz-Wilhelmheinz-wilhelm.huebers (at) dlr.deUNSPECIFIED
Date:13 March 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:THz, Terahertz, Detector, Semiconductor
Event Title:DPG-Frühjahrstagung der Sektion Kondensierte Materie
Event Location:Regensburg
Event Type:national Conference
Event Dates:10.-15. März 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management (old)
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - FAMOUS 2 (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Deßmann, Nils
Deposited On:16 Apr 2013 08:26
Last Modified:16 Apr 2013 08:26

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