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Tunable lasers have garnered significant attention due to their pivotal roles in various fields, such as biomedical imaging, quantum optics, and spectroscopy. Laser tuning has been demonstrated either discretely based on mode-hopping or continuously on the resonator length and refractive index. By t ...

Electrically tunable two-color cholesteric laser

Polymer-stabilized cholesteric liquid crystals (PSCLCs) have emerged as promising candidates for one-dimensional photonic lattices that enable precise tuning of the photonic band gap (PBG). This work systematically investigates the effect of polymer concentrations on the AC electric field-induced tu ...

To address the increasing demands for cost-effective, large-area, and precisely patterned alignment of liquid crystals, a fractional Talbot lithography alignment technique was proposed. A light intensity distribution with a double spatial frequency of a photomask could be achieved based on the fract ...