We present diffraction-limited photocurrent (PC) microscopy in the visible spectral range based on broadband excitation and an inherently phase-stable common-path interferometer. The excellent path-length stability guarantees high accuracy without the need for active feedback or post-processing of the interferograms. We illustrate the capabilities of the setup by recording PC spectra of a bulk GaAs device and compare the results to optical transmission data.
Time-domain photocurrent spectroscopy based on a common-path birefringent interferometer
Lukas Wolz, Constantin Heshmatpour, Antonio Perri, Dario Polli, Giulio Cerullo, Jonathan J. Finley, Erling Thyrhaug, Jürgen Hauer, Andreas V. Stier; Time-domain photocurrent spectroscopy based on a common-path birefringent interferometer. Rev. Sci. Instrum. 1 December 2020; 91 (12): 123101. https://doi.org/10.1063/5.0023543
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