Position Dependent Dielectric Function Near the Cu Surface

Article Chemistry, Multidisciplinary

Monatomic Iodine Dielectric Layer for Multimodal Optical Spectroscopy of Dye Molecules on Metal Surfaces

Yasuyuki Yokota et al.

Summary: Fluorescence and Raman scattering spectroscopies are widely used in chemistry, electrochemistry, and biochemistry for acquiring detailed molecular information at interfaces. A novel method using a monatomic layer of iodine as the dielectric layer has been proposed for simultaneous measurement of dye molecules on a metal surface, showing potential for various applications in catalytic chemistry and electrochemistry. This proposed multimodal strategy involves quenching the photoexcited state of molecules near the metal surface to weaken fluorescence intensity and using the resonance effect to enhance Raman signals.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Optics

Resonant binding of dielectric particles to a metal surface without plasmonics

Evgeny Bulgakov et al.

Summary: The high-Q resonant Mie modes supported by a high index dielectric spherical particle lead to sharp resonances in the radiation pressure. In the presence of a perfectly conducting metal surface, these Mie modes transform into high-Q magnetic bonding or electric antibonding modes, resulting in repulsive or attractive resonant optical forces when close to the surface. By exciting electric bonding or magnetic antibonding resonant modes, resonant optical forces of about 1 nN for micron-sized silicon particles can exceed gravitational forces by four orders of magnitude, with stable positions between pulling and pushing forces allowing for resonant binding to a metal surface.

PHYSICAL REVIEW A (2021)

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Article Multidisciplinary Sciences