Laser beams propagating in Laguerre-Gaussian (LG) modes are of considerable interest due to their widespread applications in the areas of optical manipulation of microparticles, quantum entanglement of photons, nonlinear optics, optical vortex interactions, and atomic studies. However, the proliferation of LG beams has been hampered due to the absence of reliable and reproducible fabrication technologies in producing the required optical elements for their generation. In this letter, we describe a simple, reliable, and reproducible fabrication technique for a micron-sized spiral phase plate with high power efficiency (80%-90%) and good beam uniformity. This facilitates the widespread use of LG beams in various applications: as an example the fabricated elements can easily and readily be incorporated into an existing optical trapping system with minimum modification.
Bibliographical noteFunding Information:
This work is supported by the Agency for Science, Technology and Research (A*STAR) of Singapore under A*STAR SERC Grant No. 032-101-0025. K. D. acknowledges the support of a Tan Chin Tuan Exchange Fellowship in Nanyang Technological University of Singapore. The authors would like to acknowledge Balpreet Singh Ahluwalia and Eddie Tan for the beam profile measurement.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)