IEEE LEOS Distinguished Lecturer,
Much interest has been drawn in photonic crystals, which are novel nanostructures for light. A photonic bandgap is formed in the crystals, and the propagation of electromagnetic waves is prohibited for all wave vectors. Various important scientific and engineering applications such as control of spontaneous emission, zero-threshold lasing, very sharp bending of light, trapping of photons, and so on, are expected by utilizing the photonic bandgap and artificially introduced defects and/or light-emitters. Thus far, we have developed a 3D photonic crystal with a complete bandgap at near-infrared wavelengths (1~2mm) [1] and introduced various artificial defects and/or light-emitters into the crystals [2]. In this presentation, we at first describe the present status of the 3D photonic crystals at near-infrared wavelengths and their applications to ultrasmall optical integrated circuits as one of goals of photonic crystals.
2D photonic crystals are also promising since important functional devices can
be realized even though the control of light with photonic crystal effect is
limited two-dimensionally. Thus far, we have investigated novel functional devices
utilizing 2D photonic crystals. One example is a 2D photonic crystal laser with
multi-directionally distributed feedback effect in 2D photonic lattice structure
[3, 4]. It is expected that the device can work as a high-output power surface-emitting
laser, which can oscillate in very large area with single mode and desired polarization.
The other is a device utilizing point- and line-defects in 2D photonic bandgap
structure [5]. The point-defect traps the photons which propagate through a
line-defect waveguide formed in 2D photonic crystal slab and emits them to free-space.
The phenomenon is very promising for the actual application to an ultra-small
optical device with a function of dropping (or adding) photons with various
energies from (or into) optical communication traffic (fiber). There are many
other important applications by utilizing the strong localization of photons
at the defect such as enhancement of nonlinear optical phenomena, and trapping
of nano-particles. In this presentation, the recent progresses on the above
unique 2D devices and/or phenomena including new concept of “In-Plane
Hetero Photonic Crystals” [6] and ultrahigh Q photonic nanocavity [7]
are described.
References
1. S.Noda, K.Tomoda, et al., Science, 289 (2000) 608.
2. S.Noda, M.Imada, et al., IEEE J.Qunatum Electon., 38 (2002) 725 (invited).
3. M.Imada, S.Noda, et al, Appl.Phys.Lett., 75 (1999) 316.
4. S.Noda, M.Yokoyama, et al, Science, 293 (2001) 1123.
5. S.Noda, A. Chutinan, et al., Nature, 407 (2000) 608.
6. S.B.Song, S.Noda, et al., Science, 300 (2003) 1537.
7. Y.Akahane, T.Asano, B.S.Song, and S.Noda, Nature, 425 (2003) 944.
Prof. Susumu Noda received B.S., M.S., and Ph.D. degrees all in electronics from Kyoto University, Japan, in 1982, 1984, and 1991, respectively.
From 1984 to 1988, he was with Mitsubishi Electric Corporation, and was engaged in research on optoelectronic devices such as AlGaAs/GaAs distributed feedback (DFB) lasers, multiple quantum well (MQW) DFB lasers, and grating-coupled surface-emitting lasers. His Ph.D. thesis summarizes the above works performed at Mitsubishi Electronic Corporation.
In 1988, he joined Kyoto University as a research associate and became the associate professor in 1992, and is currently a professor of Department of Electronic Science and Engineering in Kyoto University. His research interest covers quantum optoelectronics field including photonic nanostructures and quantum nanostructures. He has been actively studied ultrafast optical devices using intersubband-transition in quantum wells, growth and characterization of InAs quantum dots on GaAs substrate, and semiconductor-based 3D and 2D photonic crystals. He has an author of more than 200 scientific journals including Nature and Science on these research fields. He received Ando Incentive Prize, Marubun Incentive Prize, IBM Science Award, and Sakurai Award of Optoelectronic Industry and Technology Development Association (OITDA) in 1991, 1999, 2000, and 2002, respectively. From 2003, he has served as IEEE/LEOS Distinguished Lecturer.
He is a member of IEEE, IEICE, and JAPS. He is currently organizing sessions and/or symposiums on photonic nanostructures including photonic crystals in CLEO/QELS, CLEO/PR, MRS, Workshop on Photonics and Electromagnetic Crystal Structures, and so on.