THz-bandwidth coherent phonon emission by supported monolayer graphene in the out-of-plane direction

I. Ju Chen; Pierre Adrien Mante; Cheng Kai Chang; Chun Chiang Kuo; Kuei Hsien Chen; Vitalyi Gusev; Chi Kuang Sun

doi:10.1063/1.4772528

THz-bandwidth coherent phonon emission by supported monolayer graphene in the out-of-plane direction

I. Ju Chen, Pierre Adrien Mante, Cheng Kai Chang, Chun Chiang Kuo, Kuei Hsien Chen, Vitalyi Gusev, Chi Kuang Sun

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

Abstract

In this report, it is demonstrated that the generation of THz band-width longitudinal coherent acoustic phonons (CAPs) that propagate perpendicularly to graphene's basal plane can be achieved by photo-excitation of supported monolayer graphene. Through exclusively exciting graphene with femtosecond lasers, the observation of backward Brillouin oscillations showed that after graphene absorbed the 800nm light, longitudinal CAPs with momentum in the out-of-plane direction were generated. With the assist of a piezoelectric InGaN quantum well buried inside a wurtzite GaN substrate, the full spectrum of the CAPs was revealed. Experimental results showed that the longitudinal CAP pulse had a bipolar shape and its spectrum had reached up to 1THz. In attempt to understand the generation mechanism of the longitudinal CAP pulse, we proposed a hypothesis based on graphene's carrier dynamics.

Original language	English
Title of host publication	PHONONS 2012 - XIV International Conference on Phonon Scattering in Condensed Matter
Pages	68-72
Number of pages	5
Edition	1
DOIs	https://doi.org/10.1063/1.4772528
Publication status	Published - 1 Dec 2012
Externally published	Yes
Event	14th International Conference on Phonon Scattering in Condensed Matter, PHONONS 2012 - Ann Arbor, MI, United States Duration: 8 Jul 2012 → 12 Jul 2012

Publication series

Name	AIP Conference Proceedings
Number	1
Volume	1506
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	14th International Conference on Phonon Scattering in Condensed Matter, PHONONS 2012
Country/Territory	United States
City	Ann Arbor, MI
Period	8/07/12 → 12/07/12

Keywords

backward Brillouin oscillation
graphene
longitudinal coherent acoustic phonon

ASJC Scopus subject areas

General Physics and Astronomy

More information

10.1063/1.4772528

Cite this

Chen, I. J., Mante, P. A., Chang, C. K., Kuo, C. C., Chen, K. H., Gusev, V., & Sun, C. K. (2012). THz-bandwidth coherent phonon emission by supported monolayer graphene in the out-of-plane direction. In PHONONS 2012 - XIV International Conference on Phonon Scattering in Condensed Matter (1 ed., pp. 68-72). (AIP Conference Proceedings; Vol. 1506, No. 1). https://doi.org/10.1063/1.4772528

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abstract = "In this report, it is demonstrated that the generation of THz band-width longitudinal coherent acoustic phonons (CAPs) that propagate perpendicularly to graphene's basal plane can be achieved by photo-excitation of supported monolayer graphene. Through exclusively exciting graphene with femtosecond lasers, the observation of backward Brillouin oscillations showed that after graphene absorbed the 800nm light, longitudinal CAPs with momentum in the out-of-plane direction were generated. With the assist of a piezoelectric InGaN quantum well buried inside a wurtzite GaN substrate, the full spectrum of the CAPs was revealed. Experimental results showed that the longitudinal CAP pulse had a bipolar shape and its spectrum had reached up to 1THz. In attempt to understand the generation mechanism of the longitudinal CAP pulse, we proposed a hypothesis based on graphene's carrier dynamics.",

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year = "2012",

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language = "English",

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series = "AIP Conference Proceedings",

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Chen, IJ, Mante, PA, Chang, CK, Kuo, CC, Chen, KH, Gusev, V & Sun, CK 2012, THz-bandwidth coherent phonon emission by supported monolayer graphene in the out-of-plane direction. in PHONONS 2012 - XIV International Conference on Phonon Scattering in Condensed Matter. 1 edn, AIP Conference Proceedings, no. 1, vol. 1506, pp. 68-72, 14th International Conference on Phonon Scattering in Condensed Matter, PHONONS 2012, Ann Arbor, MI, United States, 8/07/12. https://doi.org/10.1063/1.4772528

THz-bandwidth coherent phonon emission by supported monolayer graphene in the out-of-plane direction. / Chen, I. Ju; Mante, Pierre Adrien; Chang, Cheng Kai et al.
PHONONS 2012 - XIV International Conference on Phonon Scattering in Condensed Matter. 1. ed. 2012. p. 68-72 (AIP Conference Proceedings; Vol. 1506, No. 1).

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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THz-bandwidth coherent phonon emission by supported monolayer graphene in the out-of-plane direction

Abstract

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Keywords

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