$$\begin{aligned} \begin{aligned} X'= \left\{ \begin{array}{l} x_1 S_3 S_5\ldots l_{n-3} S_{n-1 }+x_3 S_5\ldots S_{n-3 }S_{n-1}+\cdots +x_{n-3 } S_{n-1 }+x_{n-1 ...
Orbital angular momentum, as an important spatial degree of freedom of light, has prompted various promising applications. The recently proposed generalized vortex beams may further enhance the ...
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