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Spectrally Sharp Plasmon Resonances in the Near Infrared: Subwavelengt…

Year of publication
Title of paper
Spectrally Sharp Plasmon Resonances in the Near Infrared: Subwavelength Core-shell Nanoparticles
Author
[노준석교수님 연구실]
Publication in journal
Phys. Rev. Applied 12(4), p044072, 2019
Publication date
20191030

[Abstract]

Subwavelength plasmonic nanoparticles and meta-atoms have demonstrated capabilities of sensing applications and exotic optical phenomena due to their sharp resonance and strong field enhancement, but the localized surface plasmon resonance is usually located in the UV-visible regime. It has been known that spherical coreshells with lossless dielectric core and thin plasmonic shell exhibits far redshifted resonance, and this study numerically demonstrates this coreshell scheme can be applied to other nonspherical plasmonic meta-atoms, where their resonance can be redshifted up to NIR regime without spectral broadening and field enhancement weakening. This insight potentially have an impact on bio-imaging based on photothermal effect and enhanced light-matter interaction at NIR regime due to strong local field enhancement, and ultra-compact photonic components working in NIR regime.

 

DOI: 10.1103/PhysRevApplied.12.044072

Link: https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.12.044072