Multiple surface plasmon resonances enhanced nonlinear optical microscopy
Abstract
The nonlinear optical microscopies of coherent two-photon excited fluorescence and anti-Stokes Raman scattering are strongly enhanced by multiple surface plasmon resonances (MSPRs). The Au@Ag nanorods presented strong MSPRs peaks at 800 and 400 nm, and can enhance nonlinear optical microscopy at fundamental and double frequencies, respectively. A two-dimensional (2D) material of g-C3N4 is employed to study the plasmon-enhanced nonlinear optical microscopy by the femtosecond laser. The electric analysis reveals that the MSPRs of the Au@Ag nanorod can significantly enhance the signals of two-photon excited fluorescence and anti-Stokes Raman scattering by up to the orders of 104 and 1016, respectively. The results demonstrate the great advantages of plasmon-enhanced nonlinear optical microscopy for the optical analysis on 2D materials, thus providing a new adventure for increasing the optical resolutions of nonlinear optical microscopy.
- Publication:
-
Nanophotonics
- Pub Date:
- February 2019
- DOI:
- 10.1515/nanoph-2018-0231
- Bibcode:
- 2019Nanop...8..231M
- Keywords:
-
- TPEF;
- CARS;
- MSPRs;
- Au@Ag nanorods;
- surface plasmon