Stimulated low frequency Raman scattering in high ordered solid nanostructures

TL;DR

This paper investigates stimulated low frequency Raman scattering in single-crystal diamond films with a graphitized layer, revealing gigahertz frequency shifts and nonlinear interactions driven by high-power lasers.

Contribution

It presents new experimental data on SLFRS in diamond nanostructures with a built-in graphitized layer, including efficiency, threshold, and comparison with synthetic opal matrices.

Findings

SLFRS occurs at 5.1-13.2 GHz frequency shifts.

Coherent phonon modes are excited at several GHz.

SLFRS efficiency and threshold are experimentally estimated.

Abstract

Stimulated low frequency Raman scattering (SLFRS) in single-crystal diamond films (SCD) with a graphitized layer built-in is investigated. SLFRS process in all studied structures has frequency shift in gigahertz range (5.1-13.2 GHz). Coherent phonon mode excitation at a frequency of several GHz is a result of nonlinear interaction of high-power laser wave with submicron films. SLFRS conversion efficiency and threshold is estimated experimentally. Comparison of the obtained results with data on SLFRS properties in synthetic opal matrixes is made.