Transient absorption and phase microscopy with balanced detection

Cameron N. Coleal; Jesse W. Wilson; Randy A. Bartels

doi:10.1117/12.3028248

3 October 2024 Transient absorption and phase microscopy with balanced detection

Cameron N. Coleal, Jesse W. Wilson, Randy A. Bartels

Proceedings Volume 13139, Ultrafast Nonlinear Imaging and Spectroscopy XII; 131390N (2024) https://doi.org/10.1117/12.3028248
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

This presentation focuses on the use of common path, birefringent, time-delayed interferometry to detect ultrafast pump-probe effects via phase, rather than absorption of the probe pulse, in a laser-scanning microscope. The method uses balanced detection to cancel relative intensity noise inherent to fiber laser sources. We compare absorption and phase measurements in graphene, hemoglobin, and red blood cells, and present a preliminary model for determining whether, for a given wavelength, absorption or phase will yield a stronger signal.

Conference Presentation

Citation Download Citation

Cameron N. Coleal, Jesse W. Wilson, and Randy A. Bartels "Transient absorption and phase microscopy with balanced detection", Proc. SPIE 13139, Ultrafast Nonlinear Imaging and Spectroscopy XII, 131390N (3 October 2024); https://doi.org/10.1117/12.3028248

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