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Method for direct coupling of a semiconductor quantum dot to an optical fiber for single-photon source applications.
- Source :
-
Optics express [Opt Express] 2019 Sep 16; Vol. 27 (19), pp. 26772-26785. - Publication Year :
- 2019
-
Abstract
- We present an effective method for direct fiber coupling of a quantum dot (QD) that is deterministically incorporated into a cylindrical mesa. For precise positioning of the fiber with respect to the QD-mesa, we use a scanning procedure relying on interference of light reflected back from the fiber end-face and the top surface of the mesa, applicable for both single-mode and multi-mode fibers. The central part of the fiber end-face is etched to control the required distance between the top surface of the mesa and the fiber core. Emission around 1260 nm from a fiber-coupled InGaAs/GaAs QD is demonstrated and its stability is proven over multiple cooling cycles. Moreover, a single photon character of emission from such system for a line emitting above 1200 nm is proven experimentally by photon autocorrelation measurements with an obtained value of the second order correlation function at zero time-delay well below 0.5.
Details
- Language :
- English
- ISSN :
- 1094-4087
- Volume :
- 27
- Issue :
- 19
- Database :
- MEDLINE
- Journal :
- Optics express
- Publication Type :
- Academic Journal
- Accession number :
- 31674552
- Full Text :
- https://doi.org/10.1364/OE.27.026772