Space-variant Pancharatnam–Berry phase optical elements with computer-generated subwavelength gratings

2002 ◽  
Vol 27 (13) ◽  
pp. 1141 ◽  
Author(s):  
Ze’ev Bomzon ◽  
Gabriel Biener ◽  
Vladimir Kleiner ◽  
Erez Hasman
Keyword(s):  
Berry Phase ◽  
Optical Elements ◽  
Subwavelength Gratings ◽  
Space Variant

Phase Optics: Formation of Pancharatnam- Berry Phase Optical Elements With Space-Variant Subwavelength Gratings

2002 ◽  
Vol 13 (12) ◽  
pp. 45 ◽  
Author(s):  
Erez Hasman ◽  
Vladimir Kleiner ◽  
Gabriel Biener ◽  
Avi Niv
Keyword(s):  
Berry Phase ◽  
Optical Elements ◽  
Subwavelength Gratings ◽  
Space Variant

Formation of linearly polarized light with axial symmetry by use of space-variant subwavelength gratings

2003 ◽  
Vol 28 (7) ◽  
pp. 510 ◽  
Author(s):  
Avi Niv ◽  
Gabriel Biener ◽  
Vladimir Kleiner ◽  
Erez Hasman
Keyword(s):  
Axial Symmetry ◽  
Polarized Light ◽  
Use Of Space ◽  
Subwavelength Gratings ◽  
Linearly Polarized ◽  
Space Variant

scholarly journals Metalenses Based on Symmetric Slab Waveguide and c-TiO2: Efficient Polarization-Insensitive Focusing at Visible Wavelengths

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 699 ◽  
Author(s):  
Yaoyao Liang ◽  
Zhongchao Wei ◽  
Jianping Guo ◽  
Faqiang Wang ◽  
Hongyun Meng ◽  
...  
Keyword(s):  
Berry Phase ◽  
Incident Light ◽  
Visible Spectrum ◽  
Slab Waveguide ◽  
Optical Elements ◽  
Polarization Insensitive ◽  
Wavefront Shaping ◽  
Visible Wavelengths ◽  
532 Nm ◽  
Good Agreement

A key goal of metalens research is to achieve wavefront shaping of light using optical elements with thicknesses on the order of the wavelength. Here we demonstrate ultrathin highly efficient crystalline titanium dioxide metalenses at blue, green, and red wavelengths (λ0 = 453 nm, 532 nm, and 633 nm, respectively) based on symmetric slab waveguide theory. These metalenses are less than 488 nm-thick and capable of focusing incident light into very symmetric diffraction-limited spots with strehl ratio and efficiency as high as 0.96 and 83%, respectively. Further quantitative characterizations about metalenses’ peak focusing intensities and focal spot sizes show good agreement with theoretical calculation. Besides, the metalenses suffer only about 10% chromatic deviation from the ideal spots in visible spectrum. In contrast with Pancharatnam–Berry phase mechanism, which limit their incident light at circular polarization, the proposed method enables metalenses polarization-insensitive to incident light.

Space-variant polarization scrambling for image encryption obtained with subwavelength gratings

2006 ◽  
Vol 261 (1) ◽  
pp. 5-12 ◽  
Author(s):  
Gabriel Biener ◽  
Avi Niv ◽  
Vladimir Kleiner ◽  
Erez Hasman
Keyword(s):  
Image Encryption ◽  
Subwavelength Gratings ◽  
Space Variant
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