Nature Nanotechnology 17, 408–416 (2022)
The polarization control of light opens numerous explorations like information communication or three-dimensional displays. However, because the difference between number of left-handed and right-handed photons in the free electromagnetic field is less than a percent, there is still a great challenge to measure the difference.
Researchers from Jiangnan University, together with their international collaborators present a versatile method to recognize the polarization state of light by using chiral gold nanoparticle film deposited onto anodized aluminum oxide substrates. In integrated photonic devices, the photocurrent is directly related to the polarization state of light with 2.41-fold difference between right-handed circularly polarized and left-handed circularly polarized light, which provides advantages over their inorganic or organic chiral film counterparts by 1–2 orders of magnitude. The concept is clarified referring to the wave-guided chiroplasmonic modes propagating along the film surface and charge entrapment in phenylalanine on gold nanoparticles.
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Qu, G., Jiang, G. Discrimination of circular polarized light. Light Sci Appl 11, 160 (2022). https://doi.org/10.1038/s41377-022-00839-z
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DOI: https://doi.org/10.1038/s41377-022-00839-z
