Multiple surface plasmon resonances enhanced nonlinear optical microscopy

AbstractThe 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.

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Simultaneous imaging of two-photon absorption and stimulated Raman scattering by spatial overlap modulation nonlinear optical microscopy

Biomedical Optics Express ◽

10.1364/boe.4.001548 ◽

2013 ◽

Vol 4 (9) ◽

pp. 1548 ◽

Cited By ~ 7

Author(s):

Keisuke Isobe ◽

Hiroyuki Kawano ◽

Akira Suda ◽

Akiko Kumagai ◽

Atsushi Miyawaki ◽

...

Keyword(s):

Raman Scattering ◽

Optical Microscopy ◽

Nonlinear Optical ◽

Stimulated Raman Scattering ◽

Photon Absorption ◽

Nonlinear Optical Microscopy ◽

Two Photon Absorption ◽

Spatial Overlap ◽

Two Photon ◽

Simultaneous Imaging

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Localized surface plasmon resonances in nanostructures to enhance nonlinear vibrational spectroscopies: towards an astonishing molecular sensitivity

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.5.237 ◽

2014 ◽

Vol 5 ◽

pp. 2275-2292 ◽

Cited By ~ 19

Author(s):

Dan Lis ◽

Francesca Cecchet

Keyword(s):

Raman Scattering ◽

Surface Plasmon ◽

Single Molecule ◽

Nonlinear Optical ◽

Localized Surface Plasmon ◽

Surface Plasmon Resonances ◽

Surface Enhanced ◽

Plasmon Resonances ◽

Vibrational Spectroscopies ◽

Vibrational Transitions

Vibrational transitions contain some of the richest fingerprints of molecules and materials, providing considerable physicochemical information. Vibrational transitions can be characterized by different spectroscopies, and alternatively by several imaging techniques enabling to reach sub-microscopic spatial resolution. In a quest to always push forward the detection limit and to lower the number of needed vibrational oscillators to get a reliable signal or imaging contrast, surface plasmon resonances (SPR) are extensively used to increase the local field close to the oscillators. Another approach is based on maximizing the collective response of the excited vibrational oscillators through molecular coherence. Both features are often naturally combined in vibrational nonlinear optical techniques. In this frame, this paper reviews the main achievements of the two most common vibrational nonlinear optical spectroscopies, namely surface-enhanced sum-frequency generation (SE-SFG) and surface-enhanced coherent anti-Stokes Raman scattering (SE-CARS). They can be considered as the nonlinear counterpart and/or combination of the linear surface-enhanced infrared absorption (SEIRA) and surface-enhanced Raman scattering (SERS) techniques, respectively, which are themselves a branching of the conventional IR and spontaneous Raman spectroscopies. Compared to their linear equivalent, those nonlinear vibrational spectroscopies have proved to reach higher sensitivity down to the single molecule level, opening the way to astonishing perspectives for molecular analysis.

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Nonlinear optical microscopies (NOMs) and plasmon-enhanced NOMs for biology and 2D materials

Nanophotonics ◽

10.1515/nanoph-2020-0082 ◽

2020 ◽

Vol 9 (6) ◽

pp. 1341-1358

Author(s):

Jialin Ma ◽

Mengtao Sun

Keyword(s):

Raman Scattering ◽

Nonlinear Optical ◽

Stimulated Raman Scattering ◽

Second Harmonic ◽

2D Materials ◽

Research Progress ◽

Two Photon ◽

Two Dimensional Materials ◽

Anti Stokes ◽

Physical Principles

AbstractIn this review, we focus on the summary of nonlinear optical microscopies (NOMs), which are stimulated Raman scattering (SRS), coherent anti-Stokes Raman scattering (CARS), second harmonic generation (SHG), and two-photon excited fluorescence (TPEF). The introduction is divided into two parts: the principle of SRS, CARS, TPEF, and SHG and their application to biology and two-dimensional materials. We also introduce the connections and differences between them. We also discuss the principle of plasmon-enhanced NOM and its application in the above two aspects. This paper not only summarizes the research progress in the frontier but also deepens the readers’ understanding of the physical principles of these NOMs.

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