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An important property of electromagnetic fields which is partly responsible for the interaction between fields and chiral medium is called optical chirality. By enhancing this field property while maintaining constant input power, we are able to increase absorption of circularly polarized light by chiral molecules of a certain handedness. This enhancement is achieved through the use of plasmonic nano-particles...
Determination of the absolute handedness of single enantiomer at small quantities is essential in chiral drug developments. Here we provide theoretical insights, numerical analysis and experimental demonstrations of high sensitivity to zepto moles of chiral molecules using optical metasurfaces. We introduce a figure of merit (FoM) for metasurfaces that can be extracted from simple far-field scattering...
Transparent Conducting Oxides (TCOs) enable the realization of practical plasmonic and metamaterial devices at the telecommunication frequency due to their low optical loss and CMOS compatibility. By employing a conventional dry-etching process, we have fabricated GZO plasmonic waveplates, which convert linearly polarized light into circularly polarized light.
Transparent conductive oxides (TCOs) as substitutes to metals could offer many advantages for low-loss plasmonic and metamaterial (MM) applications in the near infrared (NIR) regime. By employing a lift-off process, we fabricated 2D-periodic arrays of TCO nanodisks and characterized the material's plasmonic properties to evaluate the performance of TCOs as metal substitutes.
We discuss theoretically and experimentally how plasmonic metasurfaces can largely control and manipulate the polarization state of light. By using ultrathin plasmonic arrays, circular polarization conversion and filtering is achieved over subwavelength distances.
In this paper we develop a rigorous analytical theory relating the effective impedance of plasmonic metasurfaces to a generalized form of polarizability, which compactly describes the electric, magnetic and magneto-electric response of the individual inclusions and the overall array coupling. We apply this theory to the design of plasmonic metasurfaces composed of lithographically printed planar inclusions,...
In nature, circular polarization detection is unique to bio-systems, since human eyes cannot detect polarization information. Various animal species successfully use it for defense, signaling and orientation. It may be of great interest to reproduce these functionalities in artificial photonic devices, being able to distinguish different handedness of circular polarization, and to possibly integrate...
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