Tuning optical properties of densified silica glass via high pressure and ultrafast laser excitation (opens in new tab)

Silica glass exhibits diverse structural configurations accompanied by densification under varying temperature and pressure conditions; these factors significantly influence its optical properties, such as the refractive index. However, the fundamental structural mechanisms underlying the optical properties change induced by high-pressure/high-temperature (HPHT) and femtosecond laser direct writing (FLDW) remain incompletely resolved. Herein, we report the similarities and differences in the ...