Slow-Light-Enhanced Spectral Interferometers, Phase I

Metadata Updated: August 1, 2018

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: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_34088
Maintainer Email
Public Access Level public
Bureau Code 026:00
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Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2015-12-01T08:00:00.000Z
Homepage URL
Language en-US
Data Last Modified 2017-12-07T00:00:00.000Z
Program Code 026:027
Publisher Hierarchy National Aeronautics and Space Administration > Space Technology Mission Directorate
Source Datajson Identifier True
Source Hash 9363ac592b0216acbcf5ce23d3fd80ada3bc41e1
Source Schema Version 1.1

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