euro-optics-plasma-science-2018-tracks

Laser Optics & Photonics and Atomic & Plasma Science 2018

J u l y 1 6 - 1 7 , 2 0 1 8

P r a g u e , C z e c h R e p u b l i c

Page 32

American Journal of Computer Science and Information Technology

ISSN: 2349-3917

E u r o S c i C o n J o i n t E v e n t o n

Laser Optics & Photonics and

Atomic & Plasma Science

Yohei Yamamoto, Am J Compt Sci Inform Technol 2018, Volume 6

DOI: 10.21767/2349-3917-C1-002

ptical micro cavities play an important role for the next-generation light

technology. Recently, we succeeded in fabricating spherical microcavities

from π-conjugated polymers (CPs) by simple self-assembly process. We

found that the microcavities exhibit whispering gallery mode (WGM), resonant

photoluminescence (PL) upon focused laser excitation, where PL generated

inside the sphere is confined via total internal reflection at the polymer/air

interface. The resonance occurs when the wavelength of the light is an integer

multiple of the circumference of the microsphere. The CP-based microcavities

have benefits to the conventional microcavities in the following points: simple

and low-energy fabrication process to obtain well-defined microspheres, the

micro cavities act as both cavity and emitter, the micro cavities possess high

refractive index and photo absorptivity, potent use for electrically-driven WGM

and laser oscillation. In this presentation, recent results on the fundamentals

of the self-assembly of the CPs, resonant PL from the CP microspheres, intra-

and inter-sphere light energy conversion, and optically-pumped lasing will be

discussed. Photo-switchable WGM, mode splitting, and microdisk arrays are

also presented.

Biography

Yohei Yamamoto has completed his PhD fromOsaka University

and Post-doctoral studies in the University of Tokyo and Japan

Science and Technology Agency. He moved to University of

Tsukuba on 2010 as Assistant Professor, and then promoted to

Full Professor on 2018. He has published more than 60 papers

in reputed journals. His research interests are self-assembly of

molecules and polymers to form microcavities for lighting and

lasing.

Self-assembled organic/polymeric micro lasers and photo

switchable arrays

Yohei Yamamoto

University of Tsukuba, Japan