Sol-gel substrates with engineered multiple photonic bandgaps for full-color photonic devices

摘要

An inorganic glass film with engineered multiple photonic bandgaps (MPBGs) is fabricated by sol-gel processing. This sol-gel film consists of TiO _2, SiO_2, and mixed SiO_2-TiO_2 films and has controllable characteristics of MPBGs in the overall visible region. By using the sol-gel film as a resonator, a red-green-blue pixelated liquid-crystal laser is also demonstrated.