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- Title
Creation of super-long bright channel using high NA lens axicon with dedicated multibelt binary phase mask.
- Authors
Lalithambigai, K.; Anbarasan, P.; Rajesh, K.
- Abstract
We provide a theoretical approach to use a multibelt binary phase mask in combination with a high numerical aperture lens axicon to achieve a subwavelength focal spot with large uniform focal depth when illuminated by an azimuthally polarized Laguerre-Gaussian beam. The intensity distributions are derived and evaluated based on the vector diffraction theory. Here we report a new method that generates a transversely polarized light beam with sub diffraction beam size (0.384 $$\lambda $$ ) that propagates without divergence over a long distance (of about 14 $$\lambda $$ ) in free space. The author expect such investigation is worthwhile for the applications of the optical manipulation, optical microscopy and optical micromachining.
- Subjects
NUMERICAL analysis; OPTICAL properties; LAGUERRE-Gaussian beams; OPTICAL diffraction; BINARY number system
- Publication
Optical & Quantum Electronics, 2015, Vol 47, Issue 7, p2009
- ISSN
0306-8919
- Publication type
Article
- DOI
10.1007/s11082-014-0074-1