Tilted Nanofiber Bragg Grating as an efficient photon collector from single quantum emitters: A new avenue

TL;DR

This paper introduces a tilted nanofiber Bragg grating cavity that significantly enhances the spontaneous emission rate of single quantum emitters, promising advances in quantum information and metrology.

Contribution

It presents a novel tilted nanofiber Bragg grating design with high coupling efficiency, high Q factor, and low mode volume, improving emitter-cavity interaction for quantum applications.

Findings

Coupling efficiency into the guided mode is 65%.

Q factor of the cavity is approximately 1408.71.

Purcell factor is nine times higher than surface emitters.

Abstract

We report a new gateway to enhance the sponatnesous emission rate of single quantum emitters by introducing a cavity in tilted nanofiber Bragg grating (TNFBG). We found that light emitter's coupling efficiency into the tilted grating structure's guided mode is 65%, with 70 grating periods. This novel tilted structure has a high Q factor ~ 1408.71 and low mode volume ~ 0.66 microm3- an important requirement. Further, the Purcell factor of a quantum light emitter inside the nanofiber is nine times more than that of an emitter on the cavity's surface. The further optimized system with enhanced perfromance can be used the next generation quantum information and quantum metrology application.