Photoswitchable stimulated Raman scattering spectroscopy and microscopy

Area of Science:

• Spectroscopy and Imaging
• Biophotonics
• Chemical Imaging

Background:

• Photoswitchable fluorescence offers super-resolution imaging but has limited multiplexing.
• Raman scattering provides narrowband vibrational signatures for multiplexed detection.
• Combining these offers enhanced imaging capabilities.

Purpose of the Study:

• To demonstrate photoswitchable stimulated Raman scattering (SRS) spectroscopy and microscopy.
• To achieve high-speed, reversible switching of narrowband vibrational signatures.
• To assess the technique's sensitivity and compatibility with live-cell imaging.

Main Methods:

• Development of photoswitchable SRS spectroscopy.
• Implementation of photoswitchable SRS microscopy.
• Live-cell imaging experiments using the developed technique.

Main Results:

• Successfully demonstrated photoswitchable SRS spectroscopy and microscopy.
• Achieved high-speed, fully reversible switching of vibrational signatures.
• Showcased good sensitivity and compatibility in live-cell SRS imaging.

Conclusions:

• Photoswitchable SRS is a viable technique for advanced imaging.
• The method overcomes multiplexing limitations of photoswitchable fluorescence.
• It holds potential for sensitive, multiplexed live-cell biological imaging.