Guanqu Hu
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View article: Superimposition of topological charges between vortex beams and singular points of photonic crystal slabs
Superimposition of topological charges between vortex beams and singular points of photonic crystal slabs Open
The bound state in the continuum (BIC) is a singular point of polarization in the momentum space of a periodic structure. It has been demonstrated that vortex beams can be generated by utilizing the polarization vortex around BIC based on …
View article: Orthogonally Polarized Dual-Wavelength Gain-Switched Ho:LuLiF4 Pulse Laser
Orthogonally Polarized Dual-Wavelength Gain-Switched Ho:LuLiF4 Pulse Laser Open
A compact, orthogonally polarized, gain-switched a-cut Ho:LuLiF4 laser with intra-cavity pumping by a self-Q-switched Tm:YAP laser is demonstrated here for the first time. The π-polarization laser at 2052 nm and σ-polarization laser at 206…