Fast quantum dot single photon source triggered at telecommunications wavelength

TL;DR

This paper presents a fast, telecom-wavelength-compatible quantum dot single photon source triggered at 900 nm with potential for speeds over 1 GHz, using on-chip excitation and photonic crystal cavities.

Contribution

It introduces a novel method for triggering quantum dot single photon sources at telecommunications wavelengths with high speed using integrated photonic components.

Findings

Single photon source triggered at 900 nm demonstrated

Operation at 300 MHz with potential for >1 GHz

Uses on-chip second harmonic excitation in photonic crystal cavity

Abstract

We demonstrate a quantum dot single photon source at 900 nm triggered at 300 MHz by a continuous wave telecommunications wavelength laser followed by an electro-optic modulator. The quantum dot is excited by on-chip-generated second harmonic radiation, resonantly enhanced by a GaAs photonic crystal cavity surrounding the InAs quantum dot. Our result suggests a path toward the realization of telecommunications-wavelength-compatible quantum dot single photon sources with speeds exceeding 1 GHz.