Temperature tunable photonic band gap crystals based on liquid-infiltrated inverse opal structure

Temperature tunable photonic crystals were fabricated based on liquid-infiltrated inverse opal films. The photonic band gaps were investigated at different temperatures by reflection spectra. The results show that the photonic band gap can be tuned continuously by temperature change. In this work, the band gap was blue-shifted from 558 nm to 542 nm with increasing temperature from 28 °C to 48 °C. It will provide a new method of studying the modulation near edge effect of the photonic band gap.

► Tunable photonic crystals were prepared based on solvent-infiltrated SiO2 inverse opal films.
► The photonic band gap was tuned continuously by controlling the temperature.
► The shift will provide a method to study the effects of different positions in photonic band gap.