Direct fiber-coupled single photon source based on a photonic crystal waveguide
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A single photon source plays a key role in quantum applications such as quantum computers and quantum communications. Epitaxially grown quantum dots are one of the promising platforms to implement a good single photon source. However, it is challenging to realize an efficient single photon source based on semiconductor materials due to their high refractive index. Here we demonstrate a direct fiber coupled single photon source with high collection efficiency by employing a photonic crystal (PhC) waveguide and a tapered micro-fiber. To confirm the single photon nature, the second-order correlation function g(2)(τ) is measured with a Hanbury Brown-Twiss setup. The measured g(2)(0) value is 0.15, and we can estimate 24% direct collection efficiency from a quantum dot to the fiber.
Ahn , B-H , Lee , C-M , Lim , H-J , Schlereth , T W , Kamp , M , Höfling , S & Lee , Y-H 2015 , ' Direct fiber-coupled single photon source based on a photonic crystal waveguide ' Applied Physics Letters , vol 107 , no. 8 , 081113 . DOI: 10.1063/1.4929838
Applied Physics Letters
Copyright 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in volume 107 of Applied Physics Letters and may be found at http://dx.doi.org/10.1063/1.4929838
This research was supported by National Research Foundation of Korea (NRF) funded by Korea Government (MSIP) (Nos. 20070093863 and 2014M3C1A3052537). B.-H. Ahn acknowledges the support from National Junior Research Fellowship (No. 20110031262).
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