Kao, F.-J.F.-J.KaoChen, J.-C.J.-C.ChenShih, S.-C.S.-C.ShihWei, A.A.WeiSHENG-LUNG HUANGHorng, T.-S.T.-S.HorngTorok, P.P.Torok2018-09-102018-09-10200200304018http://www.scopus.com/inward/record.url?eid=2-s2.0-0036788041&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/298211In 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. © 2002 Elsevier Science B.V. All rights reserved.Mode-locked laser; Optical beam induced current (OBIC); Radio frequency (RF)Laser mode locking; Laser pulses; Optical microscopy; Optical systems; Scanning; Transfer functions; Optical beam induced currents (OBIC); Radio frequency (RF); Induced currentsjournal article10.1016/S0030-4018(02)01806-02-s2.0-0036788041