Published December 2007
| Version v1
Journal article
Hot-phonon generation in THz quantum cascade lasers
- 1. INFM Regional Laboratory LIT3 and Dipartimento Interateneo di Fisica 'M. Merlin', Politecnico di Bari, Via Amendola 173, 70126 Bari (Italy)
- 2. INFM Regional Laboratory LIT3 and Dipartimento Interateneo di Fisica 'M. Merlin', Universita di Bari, Via Amendola 173, 70126 Bari (Italy)
- 3. Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- 4. Sandia National Laboratories, Department 1123, MS 0601, Albuquerque, New Mexico 87185-0601 (United States)
Description
Observation of non-equilibrium optical phonons population associated with electron transport in THz quantum cascade lasers is reported. The phonon occupation number was measured by using a combination of micro-probe photoluminescence and Stokes/Anti-Stokes Raman spectroscopy. Energy balance analysis allows us to estimate the phonon relaxation rate, that superlinearly increases with the electrical power in the range 1.5 W - 1.95 W, above laser threshold. This observation suggests the occurrence of stimulated emission of optical phonons
Additional details
Identifiers
Publishing Information
- Journal Title
- Journal of Physics. Conference Series (Online)
- Journal Volume
- 92
- Journal Issue
- 1
- Journal Page Range
- p. 012018
- ISSN
- 1742-6596
Conference
- Title
- 12. international conference on phonon scattering in condensed matter
- Acronym
- PHONONS 2007
- Dates
- 15-20 Jul 2007
- Place
- Paris (France)
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39039845
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ELECTRONS; LASERS; OCCUPATION NUMBER; PHONONS; PHOTOLUMINESCENCE; RAMAN SPECTROSCOPY; RELAXATION; STIMULATED EMISSION; THZ RANGE
- Descriptors DEC
- ELEMENTARY PARTICLES; EMISSION; ENERGY-LEVEL TRANSITIONS; FERMIONS; FREQUENCY RANGE; LASER SPECTROSCOPY; LEPTONS; LUMINESCENCE; PHOTON EMISSION; QUASI PARTICLES; SPECTROSCOPY