Liquid-crystal micro-photonics

This review presents the main results that were achieved over the past decade in the new field of liquid-crystal micro-photonics. After a general introduction to some aspects of state-of-the-art micro-photonics technologies, nematic colloids are discussed in terms of their self-assembly and photonic properties. Liquid-crystal lasers, based on spatially periodic, liquid-crystal phases, are reviewed, and microlasers based on liquid-crystal microdroplets are presented and discussed. We show that optical microfibres can be self-grown in water/liquid-crystal dispersions and present their waveguiding and lasing properties. The review concludes with a discussion of the resonant transfer of light across different liquid-crystal micro-objects and presents the ultra-fast optical Kerr and STED effects in bulk nematic liquid crystals.