Seminar by Prof Hiroyuki Yokoyama, Tohoku University, Japan

[Li Ruo Ming]

 

 

 

You are cordially invited to attend the seminar on   Development of highly functional semiconductor lasers and application for nonlinear-optic imaging and processing

Speaker  :  Prof Hiroyuki Yokoyama, New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan   Chaired by Dr. Lim Han Chuen    Date       :  10 November 2010 (Wednesday) Time      :  4:00 pm-4:45 pm Venue    :  Mtg Rm S1-C (S1-B1c-111),  South Spine, School of EEE, NTU                  Abstract In our present research, we are pursuing the ultimate functions of semiconductor lasers and their application potentials. Concerning the application aspect, development of advanced biomedical technologies, in which photonic methods play key roles, is an important issue.  The aim of our application research is to accomplish a very high-resolution imaging and material processing that gives a nanometer-scale spatial resolution by employing nonlinear optical effects. To realize a nanoimaging, very high functionalities are required for light sources. For example, features of ultrashort temporal duration, high peak-power, and broadband wavelength selectivity in ultraviolet-infrared regions are necessary.  However, such kinds of practical (real-world use) light sources do not exist at present, instead laboratory-use bulky instruments are utilized for just scientific demonstration. With this background, we are focusing our efforts for developing semiconductor laser based highly functional light sources. The goal of our research is to realize all-semiconductor laser devices. Toward this, device physics as well as material physics researches are significant issues in addition to advanced device fabrication technologies. In the basic research aspect, for example, finding and controlling novel ultrafast phenomena in semiconductor quantum structures, and precise control of material composition fluctuations are the subjects to be coped with. It should be noted that concrete biophonics applications including nanoimaging also give a clear direction for basic researches of semiconductor laser device physics.   Author’s Biography:     Hiroyuki Yokoyama is a professor at New Industry Creation Hatchery Center (NICHe), Tohoku University, Japan. In 1982, he joined Opto-Electronics Research Laboratories, NEC Corporation, soon after his PhD work at the Research Institute of Electrical Communication at Tohoku University, Sendai, Japan. In NEC research laboratories, he was engaged in the research of ultrafast optics, optoelectronics, and device physics of semiconductor lasers. He also has done a pioneering work in the theoretical and experimental study on microcavity lasers. He was a visiting scientist at the Research Laboratory of Electronics, Massachusetts Institute of Technology from 1988 to 1989. In 2002, he joined Tohoku University. His current research includes semiconductor laser device physics, development of highly functional light sources with semiconductor lasers and their applications for super-resolution imaging.     Jointly organized by School of EEE, Nanyang Technological University IEEE Photonics Society Singapore Chapter

 

 

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