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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 19, Iss. 12 — Dec. 1, 2002
  • pp: 2484–2494

Passband-shifting filters through postgrowth modification of filter optical thickness

Rajesh R. Patel, Denise M. Krol, Steven W. Bond, Michael D. Pocha, Glenn A. Meyer, Elaine Behymer, and Victor Sperry  »View Author Affiliations


JOSA A, Vol. 19, Issue 12, pp. 2484-2494 (2002)
http://dx.doi.org/10.1364/JOSAA.19.002484


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Abstract

We describe a postgrowth method to produce passband filters with different center wavelengths from a single growth run by irreversibly changing the refractive index of a layer or a series of layers within the filter. This leads to a new type of filter, the passband-shifting filter, whose center wavelength can be irreversibly shifted from λ<sub>0</sub> to λ<sub>0</sub>−Δλ after the filter has been grown. The passband shift can be controlled exactly by proper design of the multilayer. We present the theory behind passband-shifting-filter design along with transfer-matrix simulations and preliminary experimental results for a two-cavity filter, using lateral oxidation of Al<sub>x</sub>Ga<sub>1−x</sub>As-based materials to effect the passband shift.

© 2002 Optical Society of America

OCIS Codes
(120.2440) Instrumentation, measurement, and metrology : Filters
(160.6000) Materials : Semiconductor materials
(220.3740) Optical design and fabrication : Lithography
(230.4170) Optical devices : Multilayers
(350.2460) Other areas of optics : Filters, interference
(350.3850) Other areas of optics : Materials processing

Citation
Rajesh R. Patel, Denise M. Krol, Steven W. Bond, Michael D. Pocha, Glenn A. Meyer, Elaine Behymer, and Victor Sperry, "Passband-shifting filters through postgrowth modification of filter optical thickness," J. Opt. Soc. Am. A 19, 2484-2494 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-12-2484

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