Optical beam induced current microscopy at DC and radio frequency

Fu Jen Kao*, Jian Cheng Chen, Sheng Chih Shih, Alan Wei, Sheng Lung Huang, Tzyy Sheng Horng, Peter Török

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


In this paper we introduce the concept of optical beam induced current (OBIC) generation at radio frequencies. The method is combined with lateral raster scanning of a tightly focused spot which configuration results in a technique of high spatial resolution. We demonstrate experimentally that if a pulsed laser is used to excite the sample then the frequency transfer function of the optically active device is readily obtained with at least 1μm spatial resolution, in real time. In addition, with the help of an appropriate electronic arrangement, we demonstrate how to obtain pseudo-colored OBIC 'images' of the sample.

Original languageEnglish
Pages (from-to)39-45
Number of pages7
JournalOptics Communications
Issue number1-6
StatePublished - 1 Oct 2002


  • Mode-locked laser
  • Optical beam induced current (OBIC)
  • Radio frequency (RF)


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