GHz guided optomechanics in planar semiconductor microcavities

Hybrid opto, electro, and mechanical systems operating at several GHz offer extraordinary opportunities for the coherent control of opto-electronic excitations down to the quantum limit. We introduce here a monolithic platform for GHz semiconductor optomechanics based on electrically excited phonons...

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Bibliographic Details
Published in:arXiv.org 2022-01
Main Authors: Crespo-Poveda, Antonio, Kuznetsov, Alexander S, Hernández-Mínguez, Alberto, Tahraoui, Abbes, Biermann, Klaus, Santos, Paulo V
Format: Article
Language:English
Subjects:
Acoustic resonance
Acoustic waveguides
Acoustics
Coherence
Coupling
Embedding
Emitters
Mechanical systems
Microcavities
Opto-mechanics
Optoelectronics
Phonons
Photoluminescence
Quantum wells
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Summary:Hybrid opto, electro, and mechanical systems operating at several GHz offer extraordinary opportunities for the coherent control of opto-electronic excitations down to the quantum limit. We introduce here a monolithic platform for GHz semiconductor optomechanics based on electrically excited phonons guided along the spacer of a planar microcavity (MC) embedding quantum well (QW) emitters. The MC spacer bound by cleaved lateral facets acts as an embedded acoustic waveguide (WG) cavity with a high quality factor (\(Q\sim10^5\)) at frequencies well beyond 6~GHz, along which the acoustic modes live over tens of \(\mu\)s. The strong acoustic fields and the enhanced optomechanical coupling mediated by electronic resonances induce a huge modulation of the energy (in the meV range) and strength (over 80\%) of the QW photoluminescence (PL), which, in turn, becomes a sensitive local phonon probe. Furthermore, we show the coherent coupling of acoustic modes at different sample depths, thus opening the way for phonon-mediated coherent control and interconnection of three-dimensional epitaxial nanostructures.
ISSN:2331-8422