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THz amplification based on impurity-and transitions in Si/GeSi heterostructures
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.
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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.
| Document Type: | Conference or Workshop Item (Poster) | ||||||||||||||||
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| Title: | THz amplification based on impurity-and transitions in Si/GeSi heterostructures | ||||||||||||||||
| Authors: |
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| Date: | September 2008 | ||||||||||||||||
| Journal or Publication Title: | 4th International Conference on Advanced Optoelectronics and Lasers | ||||||||||||||||
| Refereed publication: | 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 | ||||||||||||||||
| HGF - Program: | Space | ||||||||||||||||
| 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: | Dr. Sergey Pavlov | ||||||||||||||||
| Deposited On: | 25 Nov 2008 | ||||||||||||||||
| Last Modified: | 15 Jan 2010 00:21 |
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