Design for ultrahigh-Q position-controlled nanocavities of single semiconductor nanowires in 2D photonic crystals

TL;DR

This paper demonstrates the design of ultrahigh-Q, position-controlled nanocavities in 2D photonic crystals with a single semiconductor nanowire, achieving high quality factors and small mode volumes suitable for quantum electrodynamics applications.

Contribution

The study introduces a novel design method for ultrahigh-Q nanocavities using a single nanowire in 2D photonic crystals, with detailed simulation analysis.

Findings

Achieved Q factors larger than 10^6

Mode volume smaller than 0.11 μm^3

Position dependence of Q and Vc analyzed

Abstract

Using Finite-Difference Time-Domain (FDTD) simulation, we show that ultrahigh- Q nanocavities can be obtained through the manipulation of a single semiconductor nanowire (NW) inside a slot in a line defect of a two-dimensional (2D) photonic crystal. By controlling the design and its lattice parameters of the photonic crystal, we have achieved a quality factor Q larger than 106 and a mode volume Vc smaller than 0.11 {\mu}m3 (1.25 of a cubic wavelength in the NW) for a cavity peak in the telecommunication band. This design is useful for realizing a position-controlled cavity in a photonic crystal. Here we also discuss the small dependence of the Qfactor, the Vc, and the cavity peak in relation to the position of the NWinside the slot and the potential application to the cavity quantum electrodynamics (QED) using the embedded-emitter NW.