Pyroelectric control of the superprism effect in a lithium niobate photonic crystal in slow light configuration

Abstract

International audienceIn this letter, tunability of the beam deviation on a two dimensional lithium niobate photonic crystal superprism is experimentally demonstrated thanks to the pyroelectric effect. Since the superprism geometry has been designed in a slow light configuration, the observed pyroelectric beam steering tunability is considerably enhanced. A beam deviation of 3.4°/°C has been experimentally measured for a working wavelength of 1565 nm. Direct applications can be found as ultracompact highly effective temperature variation sensors

Reversible Fragmentation and Self‐Assembling of Nematic Liquid Crystal Droplets on Functionalized Pyroelectric Substrates

“…Furthermore, combination of photonics properties of LN with LC electro‐optics could be also provided if taking into account the recent advancements for LN crystal in photonics 30…”

Recent progress in thin-film lithium niobate photonic crystal [Invited]

“…Sensors with high quality based on the LN nanotube [69] , LN microdisk [70] , and LN waveguide [71] have already been demonstrated. The sensor based on the LNPhC began from the superprism in the bulk material [72] . As for the sensor based on the TF-LNPhC, it mainly depends on the response of the high-Q resonance peak against environments.…”

“…Modulator Structure merit leads to colorful physical phenomena like slow light [65] and the superprism effect [72] .…”

Analysis and measurement of optical polarization state modulation in thin-film lithium niobate waveguides

“…From the above equation, it can be seen that the refractive index ellipsoid change caused by the electro-optic effect is related to the applied electric field, the direction of light transmission and the polarization state of the input optical signal [13] .…”