Surface acoustic wave modulation of single photon emission from GaN/InGaN nanowire quantum dots

On-chip quantum information processing requires controllable quantum light sources that can be operated on-demand at high-speeds and with the possibility of in-situ control of the photon emission wavelength and its optical polarization properties. Here, we report on the dynamic control of the optica...

Full description

Saved in:
Bibliographic Details
Published inJournal of physics. Conference series Vol. 1092; no. 1; pp. 12075 - 12078
Main Authors Lazić, S, Chernysheva, E, Hernández-Mínguez, A, Santos, P V, van der Meulen, H P
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.09.2018
Subjects
Acoustic frequencies
Acoustics
Data processing
Delay lines
Dynamic control
Emission spectra
Emissions control
Excitons
Frequency ranges
Heterostructures
Indium gallium nitrides
Light sources
Line spectra
Linear polarization
Lithium niobates
Nanowires
Optical polarization
Optical properties
Photoluminescence
Photon emission
Photons
Piezoelectricity
Quantum dots
Quantum phenomena
Spectrum analysis
Stability
Online AccessGet full text

Cover

More Information
Summary:On-chip quantum information processing requires controllable quantum light sources that can be operated on-demand at high-speeds and with the possibility of in-situ control of the photon emission wavelength and its optical polarization properties. Here, we report on the dynamic control of the optical emission from core-shell GaN/InGaN nanowire (NW) heterostructures using radio frequency surface acoustic waves (SAWs). The SAWs are excited on the surface of a piezoelectric lithium niobate crystal equipped with a SAW delay line onto which the NWs were mechanically transferred. Luminescent quantum dot (QD)-like exciton localization centers induced by compositional fluctuations within the InGaN nanoshell were identified using stroboscopic micro-photoluminescence (micro-PL) spectroscopy. They exhibit narrow and almost fully linearly polarized emission lines in the micro-PL spectra and a pronounced anti-bunching signature of single photon emission in the photon correlation experiments. When the nanowire is perturbed by the propagating SAW, the embedded QD is periodically strained and its excitonic transitions are modulated by the acousto-mechanical coupling, giving rise to a spectral fine-tuning within a ~1.5 meV bandwidth at the acoustic frequency of ~330 MHz. This outcome can be further combined with spectral detection filtering for temporal control of the emitted photons. The effect of the SAW piezoelectric field on the QD charge population and on the optical polarization degree is also observed. The advantage of the acousto-optoelectric over other control schemes is that it allows in-situ manipulation of the optical emission properties over a wide frequency range (up to GHz frequencies).
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1092/1/012075