[17p-A305-1~16] 3.11 Nanoscale optical science and near-field optics (formerly 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)

Keywords: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.