[15a-K506-1~10] 3.11 Nanoscale optical science and near-field optics

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[15a-K506-1] Effect of lattice period on the viewing angle of a metalens

〇(B)Kosuke Nishiura¹, Atsushi Hasegawa¹, Keisuke Ozawa², Yuki Abe², Mineki Taoka², Takeshi Yamagishi², Kentaro Iwami¹ (1.TUAT, 2.Samsung R&D Institute Japan)

Keywords:

metalens

In the previous study, the viewing angle was increased by decreasing the lattice period of the metalens. We investigated the cause of this increase in terms of transmittance and discretization of the phase distribution, and analyzed period of 266 nm. The transmittance did not increase with decreasing the period and did not contribute to the increase in viewing angle. It was found that the average number of sampling points in the phase range of 2π must satisfy more than 4 points for viewing angle expansion, and this condition is satisfied for the period of 266 nm. From the above, we think that viewing angle expansion can be expected with a period of 266 nm.