Controlling the spin-selective absorption with two-dimensional chiral plasmonic gratings

Spin-selective absorption in a two-dimensional (2D) chiral plasmonic grating is observed by excitation of chiral-dependent plasmonic cavity resonance. For the proposed structures, the incident right-handed circularly polarized light is absorbed with nearly 100% efficiency, whereas the incident left-...

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Veröffentlicht in:Optics letters 2019-12, Vol.44 (23), p.5868-5871
Hauptverfasser: Liu, Wenxing, Mei, Liren, Li, Yunhui, Yu, Longkun, Lai, Zhenquan, Yu, Tianbao, Chen, Hong
Format: Artikel
Sprache:eng
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Zusammenfassung:Spin-selective absorption in a two-dimensional (2D) chiral plasmonic grating is observed by excitation of chiral-dependent plasmonic cavity resonance. For the proposed structures, the incident right-handed circularly polarized light is absorbed with nearly 100% efficiency, whereas the incident left-handed circularly polarized light is reflected with same handedness. Moreover, we show that the location of spin-selective absorption can be controlled flexibly by tuning the plasmonic cavity dimension. The intensity of spin-selective absorption can be enhanced as well as suppressed based on Fabry–Perot interference phase relation. Such 2D chiral plasmonic gratings could find many potential applications in novel photon-spin selective devices, such as circularly polarized light detectors/emitters, chiral sensors, chiral cavities, and spin lasers.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.005868