One-sided composite cavity on an optical nanocapillary fiber

TL;DR

This paper numerically designs a one-sided composite cavity on an optical nanocapillary fiber, achieving high channeling efficiency and quality factors, with potential applications in quantum single-photon sources.

Contribution

It introduces a novel composite cavity design on nanocapillary fibers that enhances channeling efficiency and cavity performance for quantum technology applications.

Findings

Channeling efficiency up to 80% into one-sided NCF modes.

Maximum quality factor of 19354 achieved.

Cavity finesse of 240 with 1.3% one-pass loss.

Abstract

We numerically report a one-sided cavity on an optical nanocapillary fiber (NCF) using a composite cavity. The composite cavity is formed by combining an optical NCF and an asymmetric defect mode grating. We design the cavity to realize the maximum channeling efficiency of up to 80% into one-sided NCF-guided modes while operating from under- to critical- and overcoupling regimes. For the maximum channeling efficiency case, we found the best quality factor, finesse, and one-pass loss of the cavity are 19354, 240, and 1.3%, respectively. The present platform may open a novel route for designing fiber-based deterministic single-photon sources in quantum technologies.