期刊
APPLIED PHYSICS LETTERS
卷 96, 期 15, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3377910
关键词
integrated optics; nanophotonics; optical films; optical polymers; optical tuning; organic compounds; photochemistry; photochromism; photonic crystals; red shift
资金
- Army Research Office [W911NF0710427]
- NSF
- NSF Physics Frontier Center
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0846494] Funding Source: National Science Foundation
We demonstrate reversible tuning of a photonic crystal cavity resonance using a thin photochromic film composed of spiropyran and polymethylmethacrylate that serves as a photosensitive cladding layer. Exposure of spiropyran to ultraviolet light results in smooth redshift of the cavity resonance that can be reversed by exposure to visible wavelength light. We achieve a reversible resonance shift of up to 2.7 nm, which can be performed locally on individual cavities. The resonance shift over multiple successive UV and visible light exposures is studied to determine the repeatability of the photochromic film.
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