Differential extinction of Vibrational Molecular Overtone Transitions with Gold Nanorods and Non-Trivial Surface Enhanced Near-IR Absorption (SENIRA)

Autor:	Dadadzhanov, Daler R., Vartanyan, Tigran A., Karabchevsky, Alina
Rok vydání:	2019
Předmět:	Physics - Optics
Zdroj:	Optics express 27.21 (2019): 29471-29478
Druh dokumentu:	Working Paper
DOI:	10.1364/OE.27.029471
Popis:	Resonant coupling between plasmonic nanoantennas and molecular vibrational excitations is employed to amplify the weak overtone transitions that reside in the near-infrared. We explore for the first time the differential extinction of forbidden molecular overtone transitions coupled to the localized surface plasmons. We show that a non-trivial interplay between the molecular absorption enhancement and suppression of plasmonic absorption in a coupled system gives rise to orders of magnitude enhancement of the probe molecule differential extinction. Our results pave a road toward a new class of surface-enhanced near-infrared absorption-based sensors. Comment: 12 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1904.06465 Zobrazit plný text záznamu View this record from Arxiv