TY  - JOUR
TI  - Numerical study of single-layer and interlayer grating polarizers based on metasurface structures for quantum key distribution systems
T2  - Semiconductor Physics, Quantum Electronics & Optoelectronics
AU  - Baki, A.Q.
AU  - Tawfeeq, S.K.
VL  - 27
IS  - 1
SP  - 109
EP  - 116
PY  - 2024
DA  - 2024
DO  - 10.15407/spqeo27.01.109
UR  - https://doi.org/10.15407/spqeo27.01.109
AB  - Polarization is an important property of light, which refers to the
      direction of electric field oscillations. Polarization modulation plays an
      essential role for polarization encoding quantum key distribution (QKD).
      Polarization is used to encode photons in the QKD systems. In this work,
      visible-range polarizers with optimal dimensions based on resonance grating
      waveguides have been numerically designed and investigated using the COMSOL
      Multiphysics Software. Two structures have been designed, namely a single-
      layer metasurface grating (SLMG) polarizer and an interlayer metasurface
      grating (ILMG) polarizer. Both structures have demonstrated high extinction
      ratios, ~1.8·103 and 8.68·104, and the bandwidths equal to 45 and 55 nm for
      the SLMG and ILMG, respectively.
KW  - quantum cryptography
KW  - resonance grating
KW  - subwavelength grating
KW  - metasurfaces
KW  - wire grid polarizer
ER  -