A binary diffractive optical element, acting as a polarizing beam splitter, is proposed and analyzed. It behaves like a transmissive blazed grating, working on the first or the second diffraction order, depending on the polarization state of the incident radiation. The grating-phase profile required for both polarization states is obtained by means of suitably sized subwavelength groups etched in an isotropic dielectric medium. A rigorous electromagnetic analysis of the grating is presented, and numerical results concerning its performances in terms of diffraction efficiency as well as frequency and angular bandwidths are provided.
Pajewski, L., Borghi, R., Schettini, G., Frezza, F., Santarsiero, M. (2001). Design of a Binary Grating with Subwavelength Features that Acts as a Polarizing Beam Splitter. APPLIED OPTICS, 40(32), 5898-5905 [10.1364/AO.40.005898].
Design of a Binary Grating with Subwavelength Features that Acts as a Polarizing Beam Splitter
PAJEWSKI, LARA;SCHETTINI, Giuseppe;SANTARSIERO, Massimo
2001-01-01
Abstract
A binary diffractive optical element, acting as a polarizing beam splitter, is proposed and analyzed. It behaves like a transmissive blazed grating, working on the first or the second diffraction order, depending on the polarization state of the incident radiation. The grating-phase profile required for both polarization states is obtained by means of suitably sized subwavelength groups etched in an isotropic dielectric medium. A rigorous electromagnetic analysis of the grating is presented, and numerical results concerning its performances in terms of diffraction efficiency as well as frequency and angular bandwidths are provided.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
