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- Title
Generation of sub wavelength super long dark channel using azimuthally polarized annular multi-Gaussian beam.
- Authors
Charles, J.; Prabakaran, K.; Rajesh, K.; Pandya, Haresh
- Abstract
We investigate the interesting focal properties of phase modulation azimuthally polarized annular multi Gaussian beam employing a high numerical aperture (NA) lens on the basis of vector diffraction theory. We observe that our proposed system generates a sub wavelength focal hole of $$0.43 \uplambda $$ having large uniform focal depth of $$84 \uplambda $$ . This kind of nondiffracting focal hole is called dark channel, which may have applications in atom optical experiments, such as with atomic lenses, atom traps, and atom switches.
- Subjects
PHASE modulation; GAUSSIAN beams; WAVELENGTHS; NUMERICAL apertures; POLARIZED beams (Nuclear physics); LENSES; ELECTROMAGNETIC theory
- Publication
Optical & Quantum Electronics, 2014, Vol 46, Issue 8, p1079
- ISSN
0306-8919
- Publication type
Article
- DOI
10.1007/s11082-013-9827-5