Resonance of terahertz phonons in an acoustic nanocavity

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

Abstract

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.

Citation

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. https://doi.org/10.1103/physrevb.98.235303

• 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
• DOI: https://doi.org/10.1103/physrevb.98.235303
• Public URL: https://nottingham-repository.worktribe.com/output/1444939
• Publisher URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.235303