Coherent Axion Production through Laser Crystal Interaction

TL;DR

This paper proposes a novel laser-crystal interaction method to generate and detect axions, significantly enhancing transition probability and potentially improving experimental sensitivity in terrestrial axion searches.

Contribution

It introduces a new coherent axion production technique using laser-ionic crystal interactions with layered crystal stacking to boost detection capabilities.

Findings

Achieves up to 100 times higher transition probability than traditional methods.

Proposes a setup that could lower axion coupling detection limits to $1.32 imes 10^{-11}$ GeV$^{-1}$.

Demonstrates feasibility with current laser technology for 10-meter experimental setups.

Abstract

We investigate the interaction between an optical laser and an ionic crystal and reveal coherent emission of axions through phase-match between laser and axion fields. Such emission is further enhanced by stacking thin crystal layers of half-wavelength thickness. Based on these findings, we propose a novel method for generating and detecting axions in terrestrial experiments, achieving up to a two-order-of-magnitude increase in transition probability compared to light-shining-through-wall (LSW) experiments with the same interaction region size. For an experimental length of 10 meters, this setup could lower the exclusion limit to $g_{a\gamma\gamma}\gtrsim1.32\times10^{-11}\textrm{GeV}^{-1}$ with currently available laser technologies.