Efficient band-pass color filters enabled by resonant modes and plasmons near the Rayleigh anomalyopen access
- Authors
- Mazulquim, Daniel B; Lee, Kyu Jin; Yoon, Jae Woong; Muniz, Leone V; Borges, Ben-Hur V.; Neto, Luiz G; Magnusson, Robert
- Issue Date
- Dec-2014
- Publisher
- Optical Society of America
- Citation
- Optics Express, v.22, no.25, pp.30843 - 30851
- Indexed
- SCIE
SCOPUS
- Journal Title
- Optics Express
- Volume
- 22
- Number
- 25
- Start Page
- 30843
- End Page
- 30851
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/143275
- DOI
- 10.1364/OE.22.030843
- ISSN
- 1094-4087
- Abstract
- We design and fabricate efficient, narrow-band, transmission color filters whose operating principle resides in a narrow-band guidedmode resonance associated with a surface-plasmon resonance. The fundamental device consists of an aluminum grating over a 200-nm-thick aluminum oxide film on a glass substrate. Numerical simulations show a sharp resonance-derived spectral profile that is additionally shaped by a neighboring Rayleigh anomaly. Besides the Rayleigh effect, we show numerically that the narrow bandwidth is predominantly due to the low refractive-index contrast between the waveguide film and the substrate. Red, green, and blue filters are fabricated using ultraviolet holographic lithography followed by a lift-off process. The experimental spectral efficiency in transmission exceeds 80% with full-width-at-half-maximum linewidths near 20 nm. We provide color images of the zero-order transmitted spectra, and illustrate the pure colors associated with the modal resonance extracted as side-coupled output light.
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