RF-Induced Change of Optical Refractive Index in Strontium Barium Niobate

摘要

We show that low power high-frequency RF field induces significant (> 10~(-3)) modification of refractive index of an as-grown strontium barium niobate crystal (Sr_(0.75)-Ba_(0.25)-Nb_2O_6, SBN). We have observed the effect using a high-Q (> 7 × 10~7) SBN whispering gallery mode resonator probed with 30 /zW of optical power at 1550 nm wavelength. We discuss possible mechanisms that could be the cause of observed effects.