Reversible tuning of photonic crystal cavities using photochromic thin films

被引：29
|
作者：
Sridharan, Deepak [1 ,2 ]
Waks, Edo [1 ,2 ]
Solomon, Glenn [3 ]
Fourkas, John T. [4 ,5 ]
机构：
[1] Univ Maryland, IREAP, Dept Elect & Comp Engn, College Pk, MD 20742 USA
[2] Univ Maryland, Joint Quantum Inst, College Pk, MD 20742 USA
[3] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA
[4] Univ Maryland, Ctr Nanophys & Adv Mat, College Pk, MD 20742 USA
[5] Univ Maryland, Inst Phys Sci & Technol, Dept Chem & Biochem, College Pk, MD 20742 USA
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 15期
基金：
美国国家科学基金会;
关键词：
integrated optics; nanophotonics; optical films; optical polymers; optical tuning; organic compounds; photochemistry; photochromism; photonic crystals; red shift; SINGLE QUANTUM-DOT;
D O I：
10.1063/1.3377910
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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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页数：3
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