Measurement of the frequency dependence of the phonon damping function by Raman scattering from polaritons in GaP

Ushioda, S.; McMullen, J. D.

doi:10.1016/0038-1098(72)91182-9

Cited by 58 publications

(8 citation statements)

References 9 publications

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“…Therefore, in these relations, the frequency-dependent function of the polariton damping has to be used, generally speaking, in place of T m and Lm . The phonon-polariton damping is caused by the finite lifetime of their phonon part [22]. Thus…”

Section: Modelmentioning

confidence: 99%

Optical phonon damping in the ultrathin-layer GaAs/AlAs superlattices

Dvoynenko

Goncharenko

Romaniuk

et al. 1999

Superlattices and Microstructures

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Section: Modelmentioning

confidence: 99%

Optical phonon damping in the ultrathin-layer GaAs/AlAs superlattices

Dvoynenko

Goncharenko

Romaniuk

et al. 1999

Superlattices and Microstructures

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“…The frequency of 10.16 THz agrees fairly well with the value of 10.12 THz calculated from Eq. 4 for γ = 39.3 o using the well-known[17] dispersion formula of phononpolaritons in GaP. The inset displays the Fourier transform of the transmission curve.…”

mentioning

confidence: 99%

Velocity matching by pulse front tilting for large area THz-pulse generation

Hebling¹,

Almási²,

Kozma³

et al. 2002

Opt. Express

761

403

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We propose a generally applicable velocity matching method for THz-pulse generation by optical rectification in the range below the phonon frequency of the nonlinear material. Velocity matching is based on pulse front tilting of the ultrashort excitation pulse and is able to produce a large area THz beam. Tuning of the THz radiation by changing the tilt angle is experimentally demonstrated for a narrow line in the range between 0.8- 0.97 times the phonon frequency. According to model calculations broadband THz radiation can be generated at lower frequencies. Advantages of the new velocity matching technique in comparison to the electro-optic Cherenkov effect and non-collinear beam mixing are discussed.

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“…In the last several decades, the frequency dependence of the self-energy PW DW iGW of the TO mode of GaP has been the subject of intense theoretical and experimental work by several groups. Results for GW from linewidth analysis of infrared and Raman spectra are given in [12,13]. Very recently, Widulle et al [14] reported an analysis of Raman spectra for natural and isotopically enriched samples.…”

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confidence: 99%

“…For comparison data from Ref. [15] (triangles) and [13] (diamonds) are shown polariton modes in GaP between n p = 340 and 364 cm ± ±1 . For comparison, we also show values for a few modes published in the literature.…”

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confidence: 99%