Journal
IEEE SENSORS JOURNAL
Volume 18, Issue 22, Pages 9203-9206Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2018.2870685
Keywords
Phtodeteetors; metamaterials; surface plasmons; chiral
Funding
- National Natural Science Foundation of China [61705065]
- Hunan Provincial Natural Science Foundation of China [2017JJ3034]
- Technology Program of Changsha [kq1703001]
- National College Student Innovation Training Program [201710532122]
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We propose a new type of circularly polarized photodetector based on double-layer chiral planar metamaterial in the form of X shape. The metamaterial, realizing a high circular dichroism at 550-nm wavelength, is fabricated on a reverse-biased p-i-n diode. The light incident on the device, is filtered by the metamaterial, and then absorbed by the p-i-n diode, forming photocurrent. Our demonstrated circularly polarized photodetector have a strong ability to distinguish between left- and right-hand circularly polarized light and will be very promising for practical applications in optical communication of spin information, quantum-based optical computing, and circular dichroism spectroscopy.
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