Fluorescence photon measurements from single quantum dots on an optical nanofiber
Ramachandrarao Yalla, K. P. Nayak, and K. Hakuta
TL;DR
This study experimentally measures fluorescence photon emission from single quantum dots on optical nanofibers, demonstrating controlled deposition and quantifying photon coupling efficiency into nanofiber modes.
Contribution
It introduces a systematic method for depositing single quantum dots on nanofibers and measures their photon emission and coupling efficiency.
Findings
Coupling efficiency exceeds 9.4% with uncertainty
Quantum dots can be deposited with 5 μm precision
Photon correlations vary with excitation intensity
Abstract
We experimentally investigate the fluorescence photon emission characteristics for single q-dots by using optical nanofibers. We demonstrate that single q-dots can be deposited along an optical nanofiber systematically and reproducibly with a precision of 5 {\mu}m. For single q-dots on an optical nanofiber, we measure the fluorescence photon numbers coupled into the nanofiber and the normalized photon correlations, by varying the excitation laser intensity. We estimate the fluorescence photon coupling efficiency into the nanofiber guided modes to be higher than 9.4\pm3%.
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