Observation of light propagation across a 90 degrees corner in chains of microspheres on a patterned substrate.
To demonstrate light-path manipulation in arbitrary shapes we fabricated coupled-resonator optical waveguides (CROWs) having a 90 degrees-corner structure on a lithographically patterned substrate. The spectra of propagation light within the CROWs were directly measured by guide-collection-mode near-field scanning optical microscopy. The spectra revealed that the propagation light through the CROWs has a larger transverse-magnetic polarization mode than a transverse-electric (TE) one. The most plausible cause of the lower intensity in the TE mode is that light leaks out to the Si substrate.
Mitsui
Tadashi
T
Quantum Dot Research Center, National Institute for Materials Science, Tsukuba, Ibaraki, Japan. mitsui.tadashi@nims.go.jp
Wakayama
Yutaka
Y
Onodera
Tsunenobu
T
Takaya
Yosuke
Y
Oikawa
Hidetoshi
H