Scanning near-field optical nanospectrophotometry: a new method for nanoscale measurements of the absorption spectra of single nanoobjects

K. E. Mochalov^a, D. O. Solovyeva^a, I. S. Vaskan^abc, I. R. Nabiev<sup>bd

a</sup> M. M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow
^b National Engineering Physics Institute "MEPhI", Moscow
^c Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region
^d Université de Reims Champagne–Ardenne, Reims, France

Abstract: A new experimental method for nanoscale measurements of the absorption spectra of single nanoobjects has been developed based on scanning near-field optical microspectroscopy (SNOM) and nanospectrophotometry (NSP). The main distinctive feature of the proposed SNOM-NSP technique consists in depositing a sample onto a coverglass followed by its probing in the total internal reflection spectroscopy mode. This approach allows the number of analyzed samples to be significantly increased and provides the possibility of combining measurements with other optical techniques. The proposed SNOM-NSP method has been successfully used for studying single plasmonic nanoparticles and their complexes with Rhodamine 6G dye.

Received: 07.11.2018
Revised: 07.11.2018
Accepted: 21.11.2018

DOI: 10.21883/PJTF.2019.04.47330.17581

 English version: Technical Physics Letters, 2019, 45:2, 138–141

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