Title:
METHOD FOR DISPERSING LIGHT USING MULTILAYERED STRUCTURES
Document Type and Number:
WIPO Patent Application WO2001084224
Kind Code:
A3
Abstract:
A novel method and device for separating light of differing wavelengths (wavelength demultiplexing) uses a very simple and compact multilayer dielectric structure having high angular dispersion at certain wavelengths and angles of incidence. The structure is composed of alternating layers of dielectric materials of different refractive indices, and is designed to operate just outside the main reflection region rather than within the main reflection region. In this region just outside the main reflection region there is strong group velocity dispersion, causing different wavelengths of light to travel at different angles through the dielectric stack. As a consequence, different wavelength components of a polychromatic beam are separated as they pass through the device. The dielectric stack is preferably fabricated upon one or both sides of a transparent substrate so that the device can operate with light entering and/or exiting the substrate, eliminating the need for complicated antireflective coatings interfaced with the stack.
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Inventors:
MILLER DAVID A B
GERKEN MARTINA
NELSON BIANCA E
GERKEN MARTINA
NELSON BIANCA E
Application Number:
PCT/US2001/014081
Publication Date:
March 28, 2002
Filing Date:
May 01, 2001
Export Citation:
Assignee:
UNIV LELAND STANFORD JUNIOR (US)
International Classes:
G02B5/28; G02B27/10; H04J14/02; (IPC1-7): G02F1/35; G02B27/12
Foreign References:
| US4770496A | 1988-09-13 | |||
| US4773063A | 1988-09-20 | |||
| US5740287A | 1998-04-14 | |||
| US4284323A | 1981-08-18 |
Other References:
KOSAKA H ET AL: "PHOTONIC CRYSTALS FOR MICRO LIGHTWAVE CIRCUITS USING WAVELENGTH- DEPENDENT ANGULAR BEAM STEERING", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 74, no. 10, 8 March 1999 (1999-03-08), pages 1370 - 1372, XP000805907, ISSN: 0003-6951
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