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Resonance of terahertz phonons in an acoustic nanocavity

Sandeep, S.; Heywood, S. L.; Campion, R. P.; Kent, A. J.; Kini, R. N.


S. Sandeep

S. L. Heywood

R. N. Kini


We show the resonant behavior of ?0.5-THz longitudinal acoustic (LA) phonons in an acoustic nanocavity of thickness ?28 nm sandwiched between two GaAs/AlAs superlattices (SLs). One of the SLs, upon excitation with an ultrafast optical pulse, acts as a source of coherent LA phonons. These phonons, generated outside the cavity, resonantly drive the cavity mode. The phonon dynamics can be modeled using a driven-damped harmonic oscillator. The confinement and enhancement of phonons in the acoustic nanocavity opens up possibilities in the field of nanophononics.


Sandeep, S., Heywood, S. L., Campion, R. P., Kent, A. J., & Kini, R. N. (2018). Resonance of terahertz phonons in an acoustic nanocavity. Physical Review B, 98(23), Article 235303.

Journal Article Type Article
Acceptance Date Dec 15, 2018
Online Publication Date Dec 21, 2018
Publication Date Dec 15, 2018
Deposit Date Jan 4, 2019
Publicly Available Date Jan 4, 2019
Journal Physical Review B
Print ISSN 2469-9950
Electronic ISSN 2469-9969
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 98
Issue 23
Article Number 235303
Public URL
Publisher URL


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