Work

Multichromatic porous silicon RGB rugate filters for use in smartphone biosensing

Year: 2026

Type: article

Abstract: In this work, we report a porous silicon-based multichromatic rugate filter to select red (R), green (G), and blue (B) wavelengths from white light illumination provided by a smartphone. The full width at half-maximum values for all three color bands are below 30 nm. Spectral characterization was carried out with a spectrometer, and chromatic analysis was applied to smartphone images of the filter to verify the desired performance. Conversion of white light from the LED flash of a smartphone to multichromatic RGB illumination can be used in smartphone-based biosensing for improved limit of detection.

Source: Applied Optics

DOI: 10.1364/ao.584283

Authors: Zachary D. Martin, Sharon M. Weiss

Language: English

Topic: Silicon Nanostructures and Photoluminescence

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Science Foundation, Vanderbilt University, Division of Electrical, Communications and Cyber Systems

Awards: G2210026875, Porous silicon on paper-based optical biosensor for diagnostics

OpenAlex ID: W7124156296

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Cites: 34

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