Development of Microscopy Apparatus Switchable between Fluorescence and Ultralow-Frequency Raman Modes

Figure 5

Fluorescence images, fluorescence spectra, and ultralow-frequency Raman spectra of the individual perylene microcrystals. (a) Fluorescence spectrum of a microcrystal with a square shape. Inset: fluorescence image of the crystal. (b) Ultralow-frequency Raman spectrum of the crystal shown in the inset of (b). Three intermolecular vibration modes in the ultralow-frequency region and one intramolecular vibration mode are observed. (c) Fluorescence spectrum of a microcrystal with a rhombic shape. Inset: fluorescence image of the crystal. (d) Ultralow-frequency Raman spectrum of the crystal shown in the inset of (c). Three intermolecular and one intramolecular vibration modes are observed.

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