High-Q/V air-mode photonic crystal cavities at microwave frequencies

TL;DR

This paper reports the design and fabrication of a high-Q microwave photonic crystal cavity operating at 17.4GHz with a record quality factor, small mode volume, and air-mode electric field concentration for enhanced free-space coupling.

Contribution

It introduces a novel air-mode photonic crystal cavity at microwave frequencies with record high quality factor and small mode volume, enabling improved interactions with gaseous systems.

Findings

Achieved a Q factor of 26,400 at 17.4GHz.

Cavity design concentrates electric field in air for better coupling.

Demonstrated potential for interactions with gases and fluids.

Abstract

We present results for a photonic microwave resonator designed and fabricated at 17.4GHz with a record high Quality factor (Q = 26,400) at room temperature over a mode volume smaller than one cubic wavelength. The cavity is uniquely designed to have its electric field concentrated in air, which allows for efficient coupling to free space and facilitates interactions with gaseous atomic systems and fluids.