ONNA2017 Tomohiro Tetsumoto
Research
ONNA2017 Participation Report
Ph.D.3Tomohiro Tetsumoto, senior
Outline
I attended ONNA2017 held from June 5 to 8 (Figure 1), which stands for Optical Nanofibre Applications, a workshop on nanofibers held every other year at the Okinawa Institute of Science and Technology Graduate University. As the theme of the workshop, most of the participants were research on quantum light sources and nonlinear optical applications using nanofibers, but WGM resonator researchers such as Lan Yang from University of Washington and IIchenko from OE waves also attended the workshop. There were fewer Japanese participants this year than in the previous year, and I was the only other student, a master's student from OIST (he was originally Chinese, so he is not a native speaker). Although the schedule was tight, I recommend this workshop because it is easy to communicate with researchers and the food and service are excellent.
2. regarding his/her presentation
This time, I gave a poster presentation on photonic crystal resonator formation using nanofibers and coupling resonator formation using nanofibers. I explained to about 5 or 6 people. I realized that there were many details of my research that I had not yet clarified, so I decided to concentrate a little on clarifying them. Since there were relatively few posters around me, I left my post to listen to other people's talks during my free time. I regret that I could not explain to IIchenko about my research because the timing was not right, even though we had promised to have a discussion.
3. topic introduction
[Title unknown, Er+3, Yr+3 Contents of oscillations from ion doped hollow silica bottle resonators.
Poster presentation from OIST. I could not find a title in the program, so I may have skipped it. The presentation was on the fabrication of ion-doped hollow silica bottle resonators by coating the silica rods with Er+3 and Yr+3 ion-doped solvents prepared by the sol-gel method, followed by reflow and air injection. The doping method is a spin-coating of sol, which Tamaki used to fabricate Au-doped toroids, followed by reflow. Tamaki's method may not be so bad after all. The same method can be used with Er+3-doped sols by selecting the appropriate concentration.
R. Yalla, et al., Integration of a Single Nano-diamond with Silicon-Vacancy Center to an Optical Nanofiber].
Presentation by Prof. Shirata's group at the University of Electro-Communications, Tokyo. Prof. Shirata's group has been working on the enhancement of light emission from quantum light sources coupled with nanofibers, and has conventionally formed resonators by vacancies in nanofibers or by using fiber Bragg gratings to increase the Purcell factor. In this presentation, the authors used a system that confines light by directly attaching nanofibers to a bulk grating. Intuitively, it may seem that simply moving the nanofiber closer to the grating would increase the loss, but the performance is good. He also used AFM to pick up SiV defects and attach them to thin nanofibers, which he said could be done easily. I thought this was a good example that even something that seems impossible can be done well if done carefully.
3. other
[Iranian].
All but the invited speakers stay at the OIST guesthouse and share a room with someone. This time, I shared a room with an Iranian student, who seemed to run a local bakery and had brought a large quantity of naan-like bread from Iran (Figure 2). In fact, bread was very useful for many foods that were inedible in the meal. He was sometimes a bit eccentric, with a mysterious high energy level, but basically he was a friendly and nice person. Many people do not like to be in the same room with a stranger out of the blue, but I think the rooming system is one of the charms of ONNA, which allows people to communicate naturally even if they have never met each other before.
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