Diamond membranes: platform for photonic and opto-mechanical applications

TL;DR

This paper explores diamond membranes as versatile platforms for photonic and opto-mechanical devices, analyzing their IR properties, fabrication via femtosecond laser cutting, and light interference patterns.

Contribution

It introduces the use of diamond membranes for photonic applications, demonstrating IR characterization, laser fabrication techniques, and modeling of light interference effects.

Findings

IR absorbance dichroism changes with grating period

Successful femtosecond laser cutting of diamond membranes

Modeled interference patterns in diamond structures

Abstract

Diamond 1 - 10 micrometers thick membranes are platform for photonic, quantum and opto-mechanic devices with applications across UV-IR spectral ranges. IR characterization of diamond gratings in reflection and transmission showed a change of the IR absorbance dichroism between positive and negative when the grating period was 1-2 wavelengths (free space) including inside the region of the intrinsic diamond absorbance. Femtosecond laser cutting of micrometers-wide and mm-long structures are demonstrated by steps of carbonization > 0.4 J/cm2/pulse (1030 nm/200 fs) and oxidation of diamond membranes. Light intensity distribution inside form-birefringent diamond structure was modeled for a scaled-down structure and wavelength to reveal characteristic interference patterns for different polarizations.