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High Spectral Resolution Plasmonic Color Filters with Subwavelength Dimensions

Fleischman, Dagny and Fountaine, Katherine T. and Bukowsky, Colton R. and Tagliabue, Giulia and Sweatlock, Luke A. and Atwater, Harry A. (2019) High Spectral Resolution Plasmonic Color Filters with Subwavelength Dimensions. ACS Photonics, 6 (2). pp. 332-338. ISSN 2330-4022. doi:10.1021/acsphotonics.8b01634.

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Rapid advances in image sensor technology have generated a mismatch between the small size of image sensor pixels and the achievable filter spectral resolution. This mismatch has prevented the realization of chip-based image sensors with simultaneously high spatial and spectral resolution. We report here a concept that overcomes this trade-off, enabling high spectral resolution (transmission FWHM <31 nm) filters with subwavelength dimensions operating at optical and near-infrared wavelengths. An inverse design methodology was used to realize a new type of plasmonic cavity that efficiently couples an in-plane Fabry–Perot resonator to a single plasmonic slit that supports surface plasmon polaritons. This design principle, combined with a new metal imprinting method that yields metallic nanostructures with both top and bottom surfaces that are extremely smooth, enabled demonstration of high spectral resolution transmission filters with smaller area than any previously reported.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Fountaine, Katherine T.0000-0002-0414-8227
Bukowsky, Colton R.0000-0003-3577-8050
Tagliabue, Giulia0000-0003-4587-728X
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2019 American Chemical Society. Received: November 26, 2018; Published: January 2, 2019. This work was supported by the Air Force Office of Scientific Research under grant number FA9550-16-1-0019. G.T. acknowledges support from the Swiss National Science Foundation through the Advanced Mobility Fellowship, Grant P300P2_171417. D.F. gratefully acknowledges Artur Davoyan, Matt Sullivan Hunt, Michelle Sherrott, Phil Jahelka, and Sisir Yalamanchili for useful discussions during the development of this work. Author Contributions: D.F. and H.A.A. conceived of the ideas. K.F. formatted the optimization code, built the peak finding algorithm, and designed the FOM with input from D.F. D.F. used the optimization code to identify the filter geometry. D.F. developed the fabrication method and made the filters. G.T. and C.B. built the measurement setup. D.F. and C.B. took the measurements, and G.T. contributed to data analysis. D.F. and H.A.A. cowrote the paper. All authors discussed the results and commented on the manuscript, and H.A.A. supervised. The authors declare no competing financial interest. Notes: The data that support the findings of this study are available from the corresponding author upon reasonable request.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-16-1-0019
Swiss National Science Foundation (SNSF)P300P2_171417
Subject Keywords:nanophotonics, plasmonics, multi-mode structures, nanostructures, multispectral filtering, inverse design
Issue or Number:2
Record Number:CaltechAUTHORS:20190103-092418431
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Official Citation:High Spectral Resolution Plasmonic Color Filters with Subwavelength Dimensions. Dagny Fleischman, Katherine T. Fountaine, Colton R. Bukowsky, Giulia Tagliabue, Luke A. Sweatlock, and Harry A. Atwater. ACS Photonics 2019 6 (2), 332-338. DOI: 10.1021/acsphotonics.8b01634
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92030
Deposited By: George Porter
Deposited On:03 Jan 2019 18:49
Last Modified:16 Nov 2021 03:46

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