Microaxicave: inverted microaxicon to generate a hollow beam.
We present an inverted structure of microaxicon, called a microaxicave, with periodic micro-conic-cave shapes, to generate circular hollow beams. A microaxicave is fabricated in a quartz substrate with the combination of direct laser writing and inductively coupled plasma etching. The hollow beam generated by the quartz microaxicave is directly recorded with a CCD camera, and the hollow beam is consistent with analysis by the diffraction theory.
Kuang
Dengfeng
D
Institute of Modern Optics, The Key Laboratory of Opto-Electronic Information Science and Technology of the Education Ministry of China, Nankai University, Tianjin, 300071, China. dfkuang@nankai.edu.cn
Fang
Zhiliang
Z