Shastin, Valery and Zhukavin, Roman and Bekin, Nickolay and Tsyplenkov, Veniamin and Radamson, Henry and Pavlov, Sergey and Hübers, Heinz-Wilhelm (2008) THz amplification based on impurity-and transitions in Si/GeSi heterostructures. In: 4th International Conference on Advanced Optoelectronics and Lasers, pp. 422-424. CAOL 2008 (4. Annual Conference), [2008-09-29 - 2008-10-04], Alushta (Ukraine). ISBN 978-1-4244-1974-6.
![]() |
PDF
- Only accessible within DLR
100kB |
Abstract
Terahertz stimulated emission based on impurity-band optical transitions of phosphor donor centers embedded in Si/GeSi heterostructures is reported. THz emission was measured from selectively doped Si/GeSi structures excited by CO2 laser radiation. Amplification of 8-9 THz emission with the coefficient of 2-3 1/cm is obtained for structures with gently strained selectively doped Si layers (Nd ≈ 10^17 cm^-3) under pump density of 200 kW/cm2. Corresponding net gain taking into account small overlapping of active layer with THz mode is estimated to be ~ 200-300 1/cm. Experimental data demonstrate the possibility to use impurity-band transitions for THz laser action. The capability of Si/GeSi quantum cascade scheme which can support inverted population on donor-continuum transitions of Si conduction band is also analyzed.
Item URL in elib: | https://elib.dlr.de/55923/ | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Document Type: | Conference or Workshop Item (Poster) | ||||||||||||||||||||||||
Title: | THz amplification based on impurity-and transitions in Si/GeSi heterostructures | ||||||||||||||||||||||||
Authors: |
| ||||||||||||||||||||||||
Date: | September 2008 | ||||||||||||||||||||||||
Journal or Publication Title: | 4th International Conference on Advanced Optoelectronics and Lasers | ||||||||||||||||||||||||
Refereed publication: | No | ||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||
Page Range: | pp. 422-424 | ||||||||||||||||||||||||
ISBN: | 978-1-4244-1974-6 | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | THz, Si-based heterostructure | ||||||||||||||||||||||||
Event Title: | CAOL 2008 (4. Annual Conference) | ||||||||||||||||||||||||
Event Location: | Alushta (Ukraine) | ||||||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||||||
Event Dates: | [2008-09-29 - 2008-10-04] | ||||||||||||||||||||||||
Organizer: | IEEE Lasers and Electro-Optics Society (LEOS) | ||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||||||||||||||
HGF - Program: | Space (old) | ||||||||||||||||||||||||
HGF - Program Themes: | W EW - Erforschung des Weltraums | ||||||||||||||||||||||||
DLR - Research area: | Space | ||||||||||||||||||||||||
DLR - Program: | W EW - Erforschung des Weltraums | ||||||||||||||||||||||||
DLR - Research theme (Project): | W - Projekt SOFIA (old) | ||||||||||||||||||||||||
Location: | Berlin-Adlershof | ||||||||||||||||||||||||
Institutes and Institutions: | Institute of Planetary Research > Terahertz and Infrared Sensors | ||||||||||||||||||||||||
Deposited By: | Pavlov, Dr. Sergey | ||||||||||||||||||||||||
Deposited On: | 25 Nov 2008 | ||||||||||||||||||||||||
Last Modified: | 15 Jan 2010 00:21 |
Repository Staff Only: item control page