期刊
PHYSICS LETTERS A
卷 378, 期 9, 页码 723-727出版社
ELSEVIER
DOI: 10.1016/j.physleta.2013.11.044
关键词
Plasmonic nanolaser; Spaser; Microscopy; Intracavity spectroscopy
资金
- RFBR [12-02-01093-a, 13-02-00407-a, 13-08-01062-a, 13-02-92660, 14-02-00850]
- Dynasty Foundation
- Program of Basic Research of HSE
We propose a method for high-sensitivity subwavelength spectromicroscopy based on the usage of a spaser (plasmonic nanolaser) in the form of a scanning probe microscope tip. The high spatial resolution is defined by plasmon localization at the tip, as is the case for apertureless scanning near-field optical microscopy. In contrast to the latter method, we suggest using radiationless plasmon pumping with quantum dots instead of irradiation with an external laser beam. Due to absorption at the transition frequencies of neighboring nano-objects (molecules or clusters), dips appear in the plasmon generation spectrum. The highest sensitivity is achieved near the generation threshold. (C) 2013 Elsevier B.V. All rights reserved.
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