Near-field diffraction of laser light by dielectric corner step

S. Stafeev; V. Kotlyar; A. Kovalev

doi:10.1117/12.2051462

30 January 2014 Near-field diffraction of laser light by dielectric corner step

S. Stafeev, V. Kotlyar, A. Kovalev

Proceedings Volume 9031, Saratov Fall Meeting 2013: Optical Technologies in Biophysics and Medicine XV; and Laser Physics and Photonics XV; 90311A (2014) https://doi.org/10.1117/12.2051462
Event: Saratov Fall Meeting 2013, 2013, Saratov, Russian Federation

Abstract

The diffraction of a linearly polarized plane wave by a corner dielectric microstep of height equals of two incident wavelengths was studied using finite-difference time domain method and near-field scanning optical microscopy. It was shown that the corner step generates an elongated region of enhanced intensity, termed as a curved laser microjet. The curved laser microjet has a length of about DOF = 9.5λ and the smallest diameter FWHM = (1.94±0.15)λ at distance z = 5.5λ.

Citation Download Citation

S. Stafeev, V. Kotlyar, and A. Kovalev "Near-field diffraction of laser light by dielectric corner step", Proc. SPIE 9031, Saratov Fall Meeting 2013: Optical Technologies in Biophysics and Medicine XV; and Laser Physics and Photonics XV, 90311A (30 January 2014); https://doi.org/10.1117/12.2051462

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