期刊
PLASMONICS
卷 14, 期 6, 页码 1735-1741出版社
SPRINGER
DOI: 10.1007/s11468-019-00962-5
关键词
Optical waveguides; Metasurface; Surface plasmonics; Beam scanning deflector
资金
- National Natural Science Foundation of China [61875253, 61575201]
Metasurfaces hold great promise for overcoming the limitations of conventional refractive and diffractive optics due to their unique electromagnetic properties. Nevertheless, most of the functional metasurfaces are static. Besides, beam-steering only is discretely realized for no more than three states. A new strategy for on-chip planar metasurface is proposed to realize tunable light manipulation. Benefit from fast phase transitions of phase-change material and linear gradient phase generated by metasurfaces, continuously beam-steering within +/- 60 degrees at 10.6 mu m can be achieved in metal-insulator-metal (MIM) waveguide. Moreover, the number of addressable point of the scanning deflector is theoretically estimated to be 12, about 4 times of the previous report. The designed deflector with compact size and reconfigurable functionalities may have potential for applications in multifunctional photonic circuits.
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