Title:
PHOTONIC CRYSTAL MATERIALS AND A METHOD OF PREPARATION THEREOF
Document Type and Number:
WIPO Patent Application WO1999009439
Kind Code:
A8
Abstract:
The photonic crystal material has a 3-D periodic structure with a periodicity that varies on a length scale comparable to the wavelength of electromagnetic radiation. The 3-D periodic structure is produced by irradiating photosensitive material with electromagnetic radiation such that interference between radiation propagating in different directions within the sample gives rise to a 3-D periodic variation in intensity within the sample. Thereafter the irradiated material is developed to remove the less or more irradiated regions of the material to produce a structure having 3-D periodicity in the refractive index of the composite material. 3-D photonic material is particularly suited to use as low-loss waveguides and as a control with lasers to limit the number of modes into which a laser may emit radiation.
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Inventors:
TURBERFIELD ANDREW JONATHAN (GB)
DENNING ROBERT GORDON (GB)
DENNING ROBERT GORDON (GB)
Application Number:
PCT/GB1998/002462
Publication Date:
April 01, 1999
Filing Date:
August 18, 1998
Export Citation:
Assignee:
ISIS INNOVATION (GB)
TURBERFIELD ANDREW JONATHAN (GB)
DENNING ROBERT GORDON (GB)
TURBERFIELD ANDREW JONATHAN (GB)
DENNING ROBERT GORDON (GB)
International Classes:
G02B6/12; G02B1/02; G02B6/122; (IPC1-7): G02B6/12
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