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CW Tunable Lasers and their use in TERS

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CW Tunable Lasers and their use in TERS

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Tip-enhanced Raman spectroscopy (TERS) is an approach that has been well recognized and relies on strongly localized enhancement of Raman scattering of laser light at the point of a near atomically sharp tip. However, not least due to the lack of sources delivering laser light tunable throughout the visible spectral range, the vast majority of TERS experiments so far has been limited to single excitation wavelengths. A recent study demonstrates excitation-dependent hyperspectral imaging, exemplified on carbon nanotubes by implementing a tunable continuous-wave optical parametric oscillator (C-WAVE) into a TERS set-up.

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