[15p-2E-1~12] 4.7 Terahertz Photonics

▲ [15p-2E-1] [JSAP-OSA Joint Symposia 2015 Invited Talk] Laser Terahertz Emission Microscope

〇Masayoshi Tonouchi¹ (1.Osaka Univ.)

Keywords:terahertz,microscope

THz waves reflect various kinds of properties such as local electric field, particularly ultrafast transient phenomena, in their waveforms recorded in time domain. The observation of the THz waveforms enables us to explore ultrafast nature of electronic materials and devices as a THz emission spectroscopy. The THz emission images by scanning the laser beam on samples visualize spatial distribution of such carrier dynamics. This imaging method has a distinct advantage that the resolution of the image is limited by the laser beam diameter rather than THz wavelength. Thus construction of a laser-THz emission microscope (LTEM) would provide a new tool for material/device science and application.We proposed and have been developing LTEM since 1997. In this talk, we will report the basics of LTEM, dynamic pump-and-probe LTEM (DTEM), near field LTEM, and some examples.