- Abstract:
-
The dynamics of acoustic vibrations in terahertz quantum cascade laser structures (THz-QCLs) is studied by means of femtosecond pump-probe spectroscopy. The phonon modes are characterized by the folding of the acoustic dispersion into an effective reduced Brillouin zone. An accurate identification of this dispersion allows the sample structure and periodicity to be determined with high precision on the order of 0.1%. By temperature tuning the energy of the electronic levels of the system and ...
Expand abstract - Publication status:
- Published
- Publisher copy:
- 10.1063/1.4745044
-
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- Journal:
- JOURNAL OF APPLIED PHYSICS
- Volume:
- 112
- Issue:
- 3
- Pages:
- 033517-033517
- Publication date:
- 2012-08-01
- DOI:
- ISSN:
-
0021-8979
- URN:
-
uuid:bc2c3de8-91fc-4de9-9377-a62ab2959639
- Source identifiers:
-
351004
- Local pid:
- pubs:351004
- Language:
- English
- Copyright date:
- 2012
Journal article
Investigation of coherent acoustic phonons in terahertz quantum cascade laser structures using femtosecond pump-probe spectroscopy
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