Controlling the spin-selective absorption with two-dimensional chiral plasmonic gratings
| Autor: | Wenxing Liu, Liren Mei, Yunhui Li, Tianbao Yu, Zhenquan Lai, Longkun Yu, Hong Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Absorption spectroscopy business.industry Physics::Optics 02 engineering and technology Grating 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Optics law 0103 physical sciences Surface plasmon resonance 0210 nano-technology business Absorption (electromagnetic radiation) Excitation Plasmon Circular polarization |
| Zdroj: | Optics letters. 44(23) |
| ISSN: | 1539-4794 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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