Abstract

The photothermal microscope is a laser-based technique which utilizes the crossed-beam thermal lens to measure simultaneously both absorbance and thermal diffusivity within small probe volumes. The microscope provides images with spatial resolution better than 1 μm³ in a simple optical design. High resolution images of histological and botanical samples are presented.

© 1987 Optical Society of America

Thermal diffusivity imaging with the thermal lens microscope

Oluwatosin O. Dada, Peter E. Feist, and Norman J. Dovichi
Appl. Opt. 50(34) 6336-6342 (2011)

Spectroscopic setup for submicrometer-resolution mapping of low-signal absorption and luminescence using photothermal heterodyne imaging and photon-counting techniques

S. Papernov
Appl. Opt. 58(14) 3908-3912 (2019)

Quantitative photothermal phase imaging of red blood cells using digital holographic photothermal microscope

Srivathsan Vasudevan, George C. K. Chen, Zhiping Lin, and Beng Koon Ng
Appl. Opt. 54(14) 4478-4484 (2015)

Phase-sensitive lock-in detection for high-contrast mid-infrared photothermal imaging with sub-diffraction limited resolution

Panagis D. Samolis and Michelle Y. Sander
Opt. Express 27(3) 2643-2655 (2019)

Cavity-enhanced photothermal spectroscopy: dynamics, sensitivity, and spatial resolution

H. A. Schuessler, S. H. Chen, Z. Rong, Z. C. Tang, and E. C. Benck
Appl. Opt. 31(15) 2669-2677 (1992)