Optomechanical tuning of the polarization properties of micropillar cavity systems with embedded quantum dots

Stefan Gerhardt, Magdalena Moczała-Dusanowska, Łukasz Dusanowski, Tobias Huber, Simon Betzold, Javier Martín-Sánchez, Rinaldo Trotta, Ana Predojević, Sven Höfling, Christian Schneider

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Strain tuning emerged as an appealing tool for tuning of fundamental optical properties of solid state quantum emitters. In particular, the wavelength and fine structure of quantum dot states can be tuned using hybrid semiconductor-piezoelectric devices. Here, we show how an applied external stress can directly impact the polarization properties of coupled InAs quantum dot-micropillar cavity systems. In our experiment, we find that we can reversibly tune the anisotropic polarization splitting of the fundamental microcavity mode by approximately 60 μeV. We discuss the origin of this tuning mechanism, which arises from an interplay between elastic deformation and the photoelastic effect in our micropillar. Finally, we exploit this effect to tune the quantum dot polarization opto-mechanically via the polarization-anisotropic Purcell effect. Our work paves the way for optomechanical and reversible tuning of the polarization and spin properties of light-matter coupled solid state systems.
Original languageEnglish
Article number245308
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume101
Issue number24
DOIs
Publication statusPublished - 22 Jun 2020

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