Terahertz Resonances in the Dielectric Response Due to Second Order Phonons in a GaSe Crystal

Date

2006-09-12

Author

Yu, Baolong L
Altan, Hakan
Zeng, Fanang
Kartazayev, Vladimir
Alfano, Robert R
Mandal, Krishna C

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The dielectric function and momentum relaxation time of carriers for a single-crystal GaSe were investigated using terahertz time-domain spectroscopy over the frequency range from 0.4 to 2.4 THz. The key parameters determined from THz data using the Drude model are: the plasma frequency ωp = 6.1 ± 0.5 THz, the average momentum relaxation time <τ> = 51 +± 6 fs for electrons. The THz absorption spectrum showed resonance structures attributed to the difference frequency combinations associated with acoustical and optical phonons. This paper has already been published, see B. L. Yu, F. Zeng, V. Kartazayev, and R. R. Alfano, “Terahertz studies of the dielectric response of and second order phonons in a GaSe crystal,” Appl. Phys. Lett. 86, 182104 (2005).

Subject Keywords

Mechanical Engineering, General Materials Science, Mechanics of Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/41039

DOI

https://doi.org/10.1557/proc-0935-k03-08

Collections

Department of Physics, Conference / Seminar

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Citation Formats

B. L. Yu, H. Altan, F. Zeng, V. Kartazayev, R. R. Alfano, and K. C. Mandal, “Terahertz Resonances in the Dielectric Response Due to Second Order Phonons in a GaSe Crystal,” 2006, vol. 935, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41039.