Prof. Zhijia Hu of Anhui University's School of Physics and Optoelectronic Engineering, Key Laboratory of Optoelectronic Information Acquisition and Control of the Ministry of Education, and Anhui Provincial Laboratory of Information Materials and Intelligent Sensing, has made a series of advances in the field of liquid crystal lasers, and has published four papers in prestigious optics journals, all of which are the first unit of Anhui University. In terms of electric field modulation of liquid crystal bandgap laser, the team realized 160 nm (560-720 nm) bandgap laser wavelength modulation by driving the liquid crystal bandgap movement through DC voltage. The fluorescence spectrum (550-750 nm) of the laser dye PM597 was utilized up to 80%. A multiple linear regression model was used to elucidate the intrinsic relationship between the laser intensity emitted by the laser and the density of photonic states, fluorescence quantum yield and internal scattering, which provides theoretical support for the design of liquid crystal lasers. The research results have been published in the authoritative journal "Efficient Fluorescence Utilization and Photon Density of States-Driven Design of Liquid Crystal Lasers". "The research results were published in the authoritative journal of optics, Laser & Photonics Reviews (DOI: 10.1002/lpor.202301122; the first author is Guangyin Qu, a doctoral student). In terms of temperature-tuned laser wavelength, the team realized a temperature-tuned F?rster resonance energy transfer laser in chiral liquid crystals. By changing the temperature-driven shift of the liquid crystal bandgap, the laser wavelength is continuously changed from 560 nm (yellow) to 700 nm (red), and the laser intensity is enhanced by more than 200 times by utilizing the localized surface plasmon resonance effect of gold nanorods. The research results were published as "Efficient and tunable liquid crystal random laser based on plasmonic-enhanced FRET" in APL Photonics (DOI: 10.1063/5.0134978; first author is Dr. Qu Guangyin).
Figure 1: Schematic diagram of liquid crystal laser, simulation of liquid crystal photon density, and laser spectra under different electric fields.
Figure 2. Schematic diagram of the laser and transmission spectra of the laser device at different temperatures.
