Slow-Light-Enhanced Spectral Interferometers, Phase I

Metadata Updated: November 12, 2020

We proposoe a research program aimed at developing spectral interferometers with dramatically enhanced performance. A key aspect of our approach is to place a highly dispersive (slow-light) material into one arm of a two-path, Mach Zehnder interferometer (MZI). Theoretical analysis shows that the spectral resolution under these circumstances can be enhanced by a factor as large as the group index of the slow-light material being used. Slow-light interferometers can produce dramatic increases in the resolution or a spectrometer or they can permit much smaller physical dimensions than standard spectrometers without any degradation of resolution. In the present program, we will undertake to develop spectrometers that can be employed under practical conditions and especially those of interest to NASA. We propose three related approaches to the design of enhanced spectrometers and will perform conceptual to quantify the relative merits of these approaches. This will allow future work to further develop the most promising design(s). The three approaches: 1.) A hybrid interferometer: a Fabry-Perot (FP) interferometer will be placed within a MZ interferometer. The transfer characteristics of the FP mimic those of a slow-light material. This design can achieve the same sort of enhancement of sensitivity as that of a true slow-light medium placed inside the MZI. 2.) Our second approach makes use of a similar analogy, but on a much smaller distance scale. This approach entails the fabrication of wavelength-scale defect resonators in an otherwise perfect photonic crystal (PhC). The design employs a sequence of such resonators each with a slightly different resonance wavelength. 3.) Our third approach is to fabricate mm-scale interferometers using nano fabrication on silicon. The slow light medium is a PhC waveguide formed by a line defect in a silicon PhC structure. We will couple these structures to waveguides in an interferometer configuration.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_34088
Data First Published 2015-12-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 956d02615581550290e490d6c8f91feeec6f086f
Source Schema Version 1.1

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