Topographic optimization of photonic crystals and application to ultra-small and ultra-fast optical signal processing devices

  • Asakawa, Kiyoshi (Project Manager)
  • Sugimoto, Yoshimasa (Project Participant)
  • Watanabe, Yoshinori (Project Participant)
  • Nakamura, Shigeru (Project Participant)
  • Ishikawa, Hiroshi (Project Participant)
  • Awazu, Kouichi (Project Participant)
  • Watanabe, Akira (Project Participant)
  • Kristensen, Martin (Project Participant)
  • Borel, Peter Ingo, (Project Participant)
  • Sigmund, Ole (Project Participant)
  • Baets, Roel (Project Participant)


A domestic team in the present proposal has so far proposed an ultra-small and ultra-fast symmetrical
Mach-Zehnder (SMZ)-type all-optical switch (PC-SMZ) based on two-dimensional photonic crystals (2DPCs)
and optical non-linear quantum dots (QDs) for the future WDM/OTDM system, and demonstrated basic
technologies inevitable for the PC-SMZ, such as ultra-low propagation loss, excellent directional-coupler and
inter- ferometric optical-switch functions. An oversea team has, on the other hand, proposed an innovative
2DPC simulation method, i. e., topology optimization (TO) method and remarkably improved bandwidth and
transmittance properties of 2DPC waveguides. The current proposal involves complementary international
collaborations based on these excellent results for establishment of an excellent 2DPC design technology for
innovative ultra-small and ultra-fast optical switch with a latch function. The result is definitely thought to
pave the road to a optical logic element inevitable for the future photonic net work system.
Effective start/end date01/10/200430/09/2006