High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons

We present Purcell-enhanced (\(F_\mathrm{P} > 25\)) semiconductor InAs quantum dot radiative lifetimes of \(T_1 < 30~\mathrm{ps}\), enabled by deterministic hybrid circular Bragg gratings (hCBGs). We investigate the benefits of these short T1 times on the two-photon indistinguishability for qu...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2024-08
Main Authors: Rickert, Lucas, Vajner, Daniel A, Martin von Helversen, Schall, Johannes, Rodt, Sven, Reitzenstein, Stephan, Liu, Hanqing, Li, Shulun, Ni, Haiqiao, Niu, Zhichuan, Heindel, Tobias
Format: Article
Language:English
Subjects:
Bragg gratings
Emitters
Excitation
High temperature
Photons
Quantum dots
Quantum phenomena
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present Purcell-enhanced (\(F_\mathrm{P} > 25\)) semiconductor InAs quantum dot radiative lifetimes of \(T_1 < 30~\mathrm{ps}\), enabled by deterministic hybrid circular Bragg gratings (hCBGs). We investigate the benefits of these short T1 times on the two-photon indistinguishability for quasi-resonant and strictly resonant excitation, and observe visibilities \(\geq96\%\) at 12.5 ns time delay of consecutively emitted photons. The strongly Purcell-enhanced decay times enable a high degree of indistinguishability for elevated temperatures of up to 30 K, and moreover, allow for excitation of up to 1.28 GHz repetition rate. Our work highlights the prospects of high Purcell enhanced solid-state quantum emitters for applications in quantum information and technologies operating at GHz clock-rates.
ISSN:2331-8422