advanced-nanotechnology-materials-2018-keynote

16 / 21

Volume 4 Nano Research & Applications
ISSN: 2471-9838
Notes:
JOINT EVENT
October 04-05, 2018 Moscow, Russia
&
2nd Edition of International Conference on
26th International Conference on Advanced Nanotechnology
Materials Technology and Manufacturing Innovations
Advanced Nanotechnology 2018
& Materials-Manufacturing 2018
October 04-05, 2018 Page 43
Photonic crystal circular defect (CirD) laser
By the analogy of Inter-chips optical interconnections, the target density for Intra-chip optical interconnections is
estimated to be 10 Pbps/cm2. This value may not be possible by Si-photonics anymore, because its target density is
10 Tbps/cm2 . The authors have proposed a solution by using 2 dimensional photonic crystal (PC). The laser-cavity is a
circular defect (CirD) in the PC lattice. Only a whispering galley mode (WGM) with 9 wavelengths can stably exist there.
The light in the cavity is outputted through the line-defect waveguide which is optically coupled with the cavity. The
lasing wavelength in each cavity can be varied by changing the radius of CirD cavity. When cavities with different lasing
wavelengths are placed near an output waveguide, the wavelength division multiplexing (WDM) transmission system
can be realized without a conventional optical multiplexer. Each laser can operate at a speed of 50 Gbps due to small
cavity volume. Therefore, the WDM transmission system with 20 channels results in transmission capacity of 1 Tbps.
Since footprint of the proposed light source is 100 µm square, the density of 10 Pbps/cm2 can be realized.
Biography
Masahiko Kondow received the B.E and M.E degrees in electrical engineering, from Osaka University in 1984 and 1986, respectively. Since 1986, he had
been with Central Research Laboratory, Hitachi, Ltd. He received the Ph.D. degree in electrical engineering from Osaka University in 1991. In 1998, he
was with University of California, San Diego, as a visiting scholar. Since 2005, he has been with Osaka University as a professor in Graduate School of
Engineering.
Masahiko Kondow
Osaka University, Japan
Masahiko Kondow, Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C5-019