Deterministic design of wavelength scale, ultra-high Q photonic crystal nanobeam cavities

TL;DR

This paper presents a systematic, deterministic approach to designing ultra-high Q photonic crystal nanobeam cavities, achieving Q-factors exceeding 10^9 and high transmission, advancing optical device capabilities.

Contribution

It extends previous work by providing a detailed analysis and verification of the deterministic design method, including new air-mode cavity designs with extremely high Q.

Findings

Achieved dielectric-mode and air-mode cavities with Q>10^9

Designed cavities with high Q (>10^7) and transmission (>95%)

Validated the deterministic design approach through systematic analysis

Abstract

Photonic crystal nanobeam cavities are versatile platforms of interest for optical communications, optomechanics, optofluidics, cavity QED, etc. In a previous work \cite{quan10}, we proposed a deterministic method to achieve ultrahigh \emph{Q} cavities. This follow-up work provides systematic analysis and verifications of the deterministic design recipe and further extends the discussion to air-mode cavities. We demonstrate designs of dielectric-mode and air-mode cavities with $Q>10^9$, as well as cavities with both high-\emph{Q} ($>10^7$) and high on-resonance transmissions ($T>95%$).