Abstract
A hybrid system of a semiconductor quantum dot single photon source and a rubidium quantum memory represents a promising architecture for future photonic quantum repeaters. One of the key challenges lies in matching the emission frequency of quantum dots with the transition frequency of rubidium atoms while preserving the relevant emission properties. Here, we demonstrate the bidirectional frequency tuning of the emission from a narrow-linewidth (close-to-transform-limited) quantum dot. The frequency tuning is based on a piezoelectric strain-amplification device, which can apply significant stress to thick bulk samples. The induced strain shifts the emission frequency of the quantum dot over a total range of 1.15 THz, about three orders of magnitude larger than its linewidth. Throughout the whole tuning process, both the spectral properties of the quantum dot and its single-photon emission characteristics are preserved. Our results show that external stress can be used as a promising tool for reversible frequency tuning of high-quality quantum dots and pave the wave toward the realization of a quantum dot–rubidium atom interface for quantum networking.
Highlights
The photons should be indistinguishable, a condition that places a stringent condition on the emitter: the noise should be low enough that the spectral linewidths are transform limited
Our results show that external stress can be used as a promising tool for reversible frequency tuning of high-quality quantum dots and pave the wave toward the realization of a quantum dot–rubidium atom interface for quantum networking
Applying an electric field to a quantum dots (QDs) integrated in a diode structure can adjust its emission frequency via the quantum-confined Stark effect
Summary
The photons should be indistinguishable, a condition that places a stringent condition on the emitter: the noise should be low enough that the spectral linewidths are transform limited. We demonstrate the bidirectional frequency tuning of the emission from a narrow-linewidth (close-to-transform-limited) quantum dot.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
