Rakesh Dakroo Shikne電子工学専攻 博士後期課程
研究テーマ：Plasma Photonic Device with Liquid Metal surface.
活動の概要
We are going to develop the high energy high density plasma photonic device for high power lasers. Recently, we observed the phenomenon of the negative plasma mirror with liquid mercury. For understanding this, we used frequency resolved optically gating measurement for reflected wave from this Hg surface. When we change the input intensity, a distinctive fringe pattern is observed at certain pump intensities. As well known this type of FROG trace should have symmetry so that this fringe means at least two reflected components are appeared only in some resonance intensity. One of the candidates to produce these two waves is Metal-to-Nonmetal Transition because we can expect a large optical jump at this transition with normal metallic surface. A more detailed study of the above phenomenon using a shorter duration laser pulse will be discussed and the subsequent experiment will be performed on the 800 nm, 20 TW, 30 fs laser system at Tata Institute of Fundamental Research INDIA.
Dr Ravindra Kumar mentioned that the experiment is very interesting and can be easily carried out at TIFR. Dr Ravindra Kumar’s lab has some previous experience of similar experiment where they studied the Frequency resolved optically gated measurement of the reflected light from the various samples. For these measurements they used the commercial FROG system. The lab is well equipped with 20 TW, 800 nm, 30 fs laser system, Dazzler pulse shaper, FROG system and vacuum chambers which are necessary components of the above experiment.
研究成果概要
During the Research Collaboration Meeting at TIFR a detailed discussion was made about the possibilities of carrying out the experiment at TIFR. This opens the opportunities for future collaboration with TIFR India. Unfortunately due to the insufficient time available this time it was not possible to carry out the whole experiment. However the visit to TIFR opened the possibilities of the collaboration in near future and the experiment is scheduled to be carried out later this year. The Response of Dr Ravindra Kumar and his Laboratory at TIFR was positive on this collaboration. However they iterated that in order to perform the experiment at TIFR, more time should be given to them for the preparation. Also they gave the manuscripts of their work. And mentioned that the above experiment can be carried out later this year. Dr Ravindra Kumar mentioned that they can provide an undergraduate student for the assistance and help.
国際化に関する所感及び提言
The International Collaboration Program is an ideal opportunity for the students to increase their level of understanding and increase their ability to perform on a global scenario. TIFR is a very reputed laboratory in India and Dr. Ravindra Kumar’s lab has many collaborations in Japan, UK, Germany and some reputed laboratories across the world. The research style at TIFR has been world class with many international collaborators often visiting the laboratory. Recently some Japanese students from Osaka completed their Masters research from TIFR. My lab at ILS also has big collaborations worldwide and we have a strong expertise in the field of Warm Dense Matter. We also have a strong network of collaborators for the understanding of Warm Dense Regime of the matter. Dr Ravindra Kumar’s lab has been interested in Warm Dense Matter and the laboratory is well equipped to explore this regime.
作成日：2011年4月 2日 / 更新日：2011年11月18日
