This title appears in the Scientific Report :
2009
Please use the identifier:
http://hdl.handle.net/2128/11156 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.102147401 in citations.
Continuous Voltage Tunability of Intersubband Relaxation Times in Coupled SiGe Quantum Well Structures Using Ultrafast Spectroscopy
Continuous Voltage Tunability of Intersubband Relaxation Times in Coupled SiGe Quantum Well Structures Using Ultrafast Spectroscopy
We demonstrate continuous voltage control of the nonradiative transition lifetime in semiconductor heterostructures. The results were obtained by picosecond time-resolved experiments on biased SiGe valence band quantum well structures using a free electron laser. By varying the applied voltage, the...
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Personal Name(s): | Rauter, P. |
---|---|
Fromherz, T. / Vinh, N.Q. / Murdin, B.N. / Mussler, G. / Grützmacher, D. / Bauer, G. | |
Contributing Institute: |
Halbleiter-Nanoelektronik; IBN-1 JARA-FIT; JARA-FIT |
Published in: | Physical review letters, 102 (2009) S. 147401 |
Imprint: |
College Park, Md.
APS
2009
|
Physical Description: |
147401 |
DOI: |
10.1103/PhysRevLett.102147401 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Physical Review Letters
102 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.102147401 in citations.
We demonstrate continuous voltage control of the nonradiative transition lifetime in semiconductor heterostructures. The results were obtained by picosecond time-resolved experiments on biased SiGe valence band quantum well structures using a free electron laser. By varying the applied voltage, the intersubband hole relaxation times for quantum well structures were varied by a factor of 2 as the wave functions and their overlaps were tuned. The range of magnitudes for the lifetime indicates a possible route to silicon-based quantum cascade lasers. |