Affiliation:
1. School of Physics Peking University Beijing 100871 P. R. China
2. Department of Physics and Applied Optics Beijing Area Major Laboratory Beijing Normal University Beijing 100875 P. R. China
Abstract
AbstractPhoton momentums and their control are important for carrying quantum information and increasing information capacities. It is a great challenge to freely control multiple momentums of single photons based on only phase‐dependent schemes in isotropic metasurfaces because exact manipulations of interference phases and precise alignments between quantum emitters and metasurfaces are involved. Here, an anisotropic metasurface, in which anisotropic rather than isotropic nanoscatterers are arranged anisotropically, is proposed to freely control multiple momentums of single photons. In the metasurfaces, the phase‐independent and phase‐dependent schemes are used to independently control spin angular momentums (SAMs) and linear momentums (LMs), respectively. The phase‐independent scheme allows robust alignment between quantum emitters and metasurfaces. The anisotropic design amends geometrical phases for oblique emissions, providing larger ranges (up to 53°) for tailoring LMs. In experiments, three‐channel single‐photon emissions with independent SAMs and LMs are demonstrated. The introduction of anisotropic nanoscatterers and anisotropic arrangements of nanoscatterers is a more general design method for metasurfaces, and it could provide more flexibility to freely and efficiently tailor single‐photon emissions.
Funder
National Basic Research Program of China
National Natural Science Foundation of China
Natural Science Foundation of Beijing Municipality
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
3 articles.
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