Coupled plasmonic systems: controlling the plasmon dynamics and spectral modulations for molecular detection. Issue 10 (9th March 2021)

• Record Type: Journal Article
• Authors: Kitajima, Yuto; Sakamoto, Hiyori; Ueno, Kosei
• Is Part Of: Nanoscale. Volume 13:Issue 10(2021)
• Page Start: 5187
• Page End: 5201
• Publication Date: 2021-03-09
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr06681h
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A review on molecular detection using coupled plasmonic systems based on spectral modulations and further near-field enhancements. Abstract : This review describes recent studies on coupled plasmonic systems for controlling plasmon dynamics and molecular detection using spectral modulations. The plasmon dephasing time can be controlled by weak and strong coupling regimes between the plasmonic nanostructures or localized surface plasmon resonances (LSPRs) and the other optical modes such as microcavities. The modal coupling induces near-field enhancement by extending the plasmon dephasing time to increase the near-field enhancement at certain wavelengths resulting in the enhancement of molecular detection. On the other hand, the interaction between LSPR and molecular excited or vibrational states also modulates the resonance spectrum, which can also be used for detecting a small number of molecules with a subtle change in the spectrum. The spectral modulation is induced by weak and strong couplings between LSPRs and the electronic or vibrational states of molecules, and this method is sensitive enough to measure a single molecule.