Optical waveguides – Planar optical waveguide
Reexamination Certificate
2007-11-27
2007-11-27
Wong, Tina M. (Department: 2874)
Optical waveguides
Planar optical waveguide
C385S125000, C385S131000, C359S332000
Reexamination Certificate
active
11551745
ABSTRACT:
A three-dimensional photonic crystal has periodic-refractive-index structures including a first layer having a periodic structure based on a first rectangular lattice having a period of A along a first axis and a period of B along a second axis orthogonal to the first axis in the plane direction, a second layer having a periodic structure disposed at a position shifted by +3B/8 along the second axis with respect to the position of the first rectangular lattice, a third layer having a periodic structure disposed at a position shifted by A/2 along the first axis and B/2 along the second axis with respect to the position of the periodic structure in the first layer, and a fourth layer having a periodic structure disposed at the same position as the periodic structure in the second layer.
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Hoshi Hikaru
Ikemoto Kiyokatsu
Nobayashi Kazuya
Takagi Akinari
Canon Kabushiki Kaisha
Canon USA Inc. IP Division
Wong Tina M.
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