[17p-A305-1~16] 3.11 ナノ領域光科学･近接場光学（旧3.12）

▼ [17p-A305-2] A Deflector and QWP Combined Metasurface for Chip-Scale Atomic Clock

〇Ponrapee Prutphongs¹、Katsuma Aoki¹、Satoshi Ikezawa¹、Motoaki Hara²、Kentaro Iwami¹ (1.Tokyo Univ. of Agriculture and Technology、2.National Inst. of Information and Communication Technology)

キーワード：Metasurface, Chip scale atomic clock, Reflection-type vapor cell

In this research, we fabricated a hydrogenated amorphous silicon (a-Si:H) metasurface functioning as a beam deflector and a quarter-wave plate (QWP) that is able to apply in reflection-type vapor cell of chip scale atomic clock. As a result, it satisfactorily performed both as a deflector and QWP with an accurate deflection angle, high transmittance, and 91% degree of circular polarization (DOCP) is circularly convertible from incident linear polarization. However, the deflection efficiency was still around 51% considerably better than the conventional diffraction grating, although there are still rooms to improve.