Coherent interference effects in a nano-assembled optical cavity-QED system
Paul E. Barclay, Charles Santori, Kai-Mei Fu, Raymond G. Beausoleil,, Oskar Painter
TL;DR
This paper demonstrates quantum interference effects in a nano-assembled optical cavity-QED system using diamond nanocrystals with NV centers, revealing Fano-like spectral features and estimating the coherent coupling rate.
Contribution
It introduces a precise assembly of NV centers in a microdisk cavity and models the quantum interference effects observed in the system.
Findings
Fano-like quantum interference features observed in emission spectrum
Estimated NV zero phonon line coherent coupling rate of 28 MHz
High-precision positioning of nanocrystals in optical cavity
Abstract
Diamond nanocrystals containing NV color centers are positioned with 100-nanometer-scale accuracy in the near-field of a high-Q SiO2 microdisk cavity using a fiber taper. The cavity modified nanocrystal photoluminescence is studied, with Fano-like quantum interference features observed in the far-field emission spectrum. A quantum optical model of the system is proposed, from which the NV- zero phonon line coherent coupling rate to the microdisk is estimated to be 28 MHz for a nearly optimally placed nanocrystal.
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