Observation of extraordinary optical activity in planar chiral photonic crystals.
Control of light polarization is a key technology in modern photonics including application to optical manipulation of quantum information. The requisite is to obtain large rotation in isotropic media with small loss. We report on extraordinary optical activity in a planar dielectric on-waveguide photonic crystal structure, which has no in-plane birefringence and shows polarization rotation of more than 25 degrees for transmitted light. We demonstrate that in the planar chiral photonic crystal, the coupling of the normally incident light wave with low-loss waveguide and Fabry-Pérot resonance modes results in a dramatic enhancement of the optical activity.
Konishi
Kuniaki
K
Department of Applied Physics, University of Tokyo, Core Research for Evolutional Science and Technology, JST, Tokyo, Japan.
Bai
Benfeng
B
Meng
Xiangfeng
X
Karvinen
Petri
P
Turunen
Jari
J
Svirko
Yuri P
YP
Kuwata-Gonokami
Makoto
M
D001718:Birefringence; D003460:Crystallization; D004867:Equipment Design; D008027:Light; D008855:Microscopy, Electron, Scanning; D008859:Microscopy, Polarization; D015233:Models, Statistical; D008962:Models, Theoretical; D055095:Optics and Photonics; D017785:Photons; D012542:Scattering, Radiation; D014025:Titanium / Q000737:chemistry
C009495:titanium dioxide; D014025:Titanium