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Authors: L. Elsinger, R. Gourgues, I. E. Zadeh, J. Maes, A. Guardiani, G. Bulgarini, S. F. Pereira, S. N. Dorenbos, V. Zwiller, Z. Hens, D. Van Thourhout
Title: Wavelength-resolved Purcell enhancement of PbS/CdS quantum dots measured on a chip-based platform
Format: International Conference Proceedings
Publication date: 2/2020
Journal/Conference/Book: Photonics West (OPTO)
Editor/Publisher: SPIE, 
Volume(Issue): Proc. SPIE 11289 p. 1128914
Location: San Francisco, United States
DOI: 10.1117/12.2547265
Citations: Look up on Google Scholar


Future quantum optical networks will require an integrated solution to multiplex suitable sources and detectors on a low-loss platform. Here we combined superconducting single-photon detectors with colloidal PbS/CdS quantum dots (QDs) and low-loss silicon nitride passive photonic components to show their combined operation at cryogenic temperatures. Using a planar concave grating spectrometer, we performed wavelength-resolved measurements of the photoluminescence decay of QDs, which were deterministically placed in the gap of plasmonic antennas, in order to improve their emission rate. We observed a Purcell enhancement matching the antenna simulations, with a concurrent increase of the count rate on the superconducting detectors.

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