Ultrafast decay of high frequency optical phonon mode in KTiOPO4
| Autor: | Manoj Dobbala, Sanjay Adhikari, Shan Yang, Feruz Ganikhanov |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics and Astronomy (miscellaneous)
Oscillation Phonon business.industry Chemistry Dephasing Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Laser law.invention Laser linewidth symbols.namesake Optics law Femtosecond symbols Coherent anti-Stokes Raman spectroscopy Atomic physics Raman spectroscopy business |
| Zdroj: | Applied Physics Letters. 99:221903 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.3664218 |
| Popis: | Decay of the strongest optical phonon mode in KTiOPO4 was directly traced using femtosecond coherent anti-Stokes Raman scattering spectroscopy. Dephasing of the Raman active mode at ∼700 cm−1 proceeds with the nonlinear polarization dephasing time of 495 ± 10 fs. The dephasing is solely due to the phonon energy decay with corresponding homogeneous linewidth of 21.4 ± 0.5 cm−1. Low temperature linewidth of 14.7 cm−1 is estimated from our data assuming that down-conversion phonon relaxation process is dominant. Our results can help to understand stimulated Raman generation and oscillation of Stokes wave in laser systems where Raman gain is critically dependent on dephasing time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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