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

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


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.

Original languageEnglish
Article number123101
JournalReview of Scientific Instruments
Issue number12
StatePublished - 1 Dec 2020


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