Title :
New evolution in interfering femtosecond laser processing
Author :
Nakata, Y. ; Matsuba, Yuka ; Murakawa, K. ; Miyanaga, N.
Author_Institution :
Inst. of Laser Eng., Osaka Univ., Suita, Japan
fDate :
June 30 2013-July 4 2013
Abstract :
In interfering femtosecond laser processing, an interference pattern is transferred to material surface, and matrix with a certain unit structure can be generated in a single shot of laser irradiation. So, a metamaterial consist of meta-atoms can be fabricated by metallic thin film processing. The structure of it can be designed by controlling the phase shift and variation of amplitude between interfering laser beams. In this paper, interference patterns are summarized in the case of four and six beam correlation. In addition, the structural changes with different processing thresholds are investigated in detail.
Keywords :
high-speed optical techniques; laser beam effects; laser materials processing; light interference; metallic thin films; optical correlation; optical design techniques; optical fabrication; optical films; optical metamaterials; amplitude variation; beam correlation; interference pattern; interfering femtosecond laser processing; interfering laser beams; laser irradiation; material surface; metaatoms; metallic thin film processing; metamaterial; phase shift; structural changes; unit structure; Arrays; Correlation; Interference; Laser beams; Metamaterials; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2013 Conference on
Conference_Location :
Kyoto
DOI :
10.1109/CLEOPR.2013.6600017
