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.
© 2010 Optical Society of America
Diffraction and Gratings
Original Manuscript: April 8, 2010
Revised Manuscript: May 18, 2010
Manuscript Accepted: June 2, 2010
Published: June 18, 2010
Dengfeng Kuang and Zhiliang Fang, "Microaxicave: inverted microaxicon to generate a hollow beam," Opt. Lett. 35, 2158-2160 (2010)