## Multilayer Thin-Film Structures with High Spatial Dispersion

Applied Optics, Vol. 42, Issue 7, pp. 1330-1345 (2003)

http://dx.doi.org/10.1364/AO.42.001330

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### Abstract

We demonstrate how to design thin-film multilayer structures that separate multiple wavelength channels with a single stack by spatial dispersion, thus allowing compact manufacturable wavelength multiplexers and demultiplexers and possibly beam-steering or dispersion-control devices. We discuss four types of structure—periodic one-dimensional photonic crystal superprism structures, double-chirped structures exploiting wavelength-dependent penetration depth, coupled-cavity structures with dispersion that is due to stored energy, and numerically optimized nonperiodic structures utilizing a mixture of the other dispersion effects. We experimentally test the spatial dispersion of a 200-layer periodic structure and a 66-layer nonperiodic structure. Probably because of its greater design freedom, the nonperiodic structure can give both a linear shift with wavelength and a larger usable shift than the thicker periodic structure gives.

© 2003 Optical Society of America

**OCIS Codes**

(060.4230) Fiber optics and optical communications : Multiplexing

(230.4170) Optical devices : Multilayers

(260.2030) Physical optics : Dispersion

**Citation**

Martina Gerken and David A. B. Miller, "Multilayer Thin-Film Structures with High Spatial Dispersion," Appl. Opt. **42**, 1330-1345 (2003)

http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-7-1330

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