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Ultrasonic control of terahertz radiation via lattice anharmonicity in LiNbO3

Poolman, Rhys Huw, Ivanov, Alexei and Muljarov, Egor A. ORCID: 2011. Ultrasonic control of terahertz radiation via lattice anharmonicity in LiNbO3. Applied Physics Letters 98 (26) , 263505. 10.1063/1.3605569

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We propose a tunable terahertz (THz) filter using the resonant acousto-optic (RAO) effect. We present a design based on a transverse optical (TO) phonon mediated interaction between a coherent acoustic wave and the THz field in LiNbO3. We predict a tunable range for the filter of up to 4 THz via the variation of the acoustic frequency between 0.1 and 1 GHz. The RAO effect in this case is due to cubic and quartic anharmonicities between TO phonons and the acoustic field. The effect of the interference between the anharmonicities is also discussed.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: acousto-optical devices, acousto-optical effects, lithium compounds, optical filters, terahertz waves
Additional Information: 3 pp.
Publisher: American Institute of Physics
ISSN: 0003-6951
Last Modified: 07 May 2023 10:06

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