Related papers: Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to low-Q cylindrical nanocavities

Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to low-Q cylindrical nanocavities

URL: http://arxiv.org/abs/2407.11642v1
Date: Tue, 16 Jul 2024 12:06:30 GMT
Title: Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to low-Q cylindrical nanocavities
Authors: Abhiroop Chellu, Subhajit Bej, Hanna Wahl, Hermann Kahle, Topi Uusitalo, Roosa Hytönen, Heikki Rekola, Jouko Lang, Eva Schöll, Lukas Hanschke, Patricia Kallert, Tobias Kipp, Christian Strelow, Marjukka Tuominen, Klaus D. Jöns, Petri Karvinen, Tapio Niemi, Mircea Guina, Teemu Hakkarainen,
Abstract summary: Quantum dots (QDs) are promising sources capable of producing high-quality quantum light states on demand. In this study, we utilize the Purcell effect to demonstrate up to a 38-fold enhancement in the emission rate of InAs QDs.
Score: 0.0
License: http://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract: Generation of single and entangled photons is crucial for photonic quantum information processing. Quantum dots (QDs) are promising sources capable of producing high-quality quantum light states on demand, although at a rate typically limited by their spontaneous radiative lifetime. In this study, we utilize the Purcell effect to demonstrate up to a 38-fold enhancement in the emission rate of InAs QDs. We achieve this by coupling individual QDs to metal-clad GaAs nanopillars characterized with mode volume of 4.5x10-4 ({\lambda}/n)3 and quality factor of 62, consequently enabling high Purcell enhancement across a bandwidth of 15 nm. We measure a multi-photon emission probability as low as 0.5 % from QDs within these cavities. In addition to providing a valuable platform for exploring light-matter interaction at the nanoscale, this work represents a significant stride towards developing QD-sources emitting at high repetition rates, underpinning their role in the future of quantum communication and computing.

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