Work

Generation and Propagation of Superhigh-Frequency Bulk Acoustic Waves in GaAs

Year: 2019

Type: article

Abstract: Superhigh-frequency (1\ensuremath{-}20 GHz) acoustic waves are an important tool for controlling electronic, optical, and magnetic excitations in semiconductor nanostructures. The authors demonstrate the piezoelectric generation of bulk longitudinal acoustic waves in GaAs up to 20 GHz. Studies of the wave-propagation properties over a wide temperature range show that scattering by thermal phonons is strongly suppressed below 80 K, thus enabling long propagation lengths and acoustic quality factors exceeding 104. These findings point to exciting opportunities for electrically driven optomechanics and acoustoelectric control in this frequency range.

Source: Physical Review Applied

DOI: 10.1103/physrevapplied.12.044013

Authors: Diego H.O. Machado, Antonio Crespo-Poveda, Alexander S. Kuznetsov, Klaus Biermann, Luis V.A. Scalvi, Paulo V. Santos

Institutions: Paul Drude Institute for Solid State Electronics, Forschungsverbund Berlin, Universidade Estadual Paulista (Unesp)

Language: English

Topic: Acoustic Wave Resonator Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Deutsche Forschungsgemeinschaft, Fundação de Amparo à Pesquisa do Estado de São Paulo

Awards: G4510467736, Kohärente GHzElektroOptomechanik mit polaromechanischen Kristallen