Photo-Reversible Regulation of Optical Stop Bands

Gu, Zhong Ze; Iyoda, Tomokazu; Fujishima, Akira; Sato, Osamu

doi:10.1002/1521-4095(200109)13:17<1295::aid-adma1295>3.0.co;2-7

Cited by 70 publications

(46 citation statements)

References 8 publications

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“…Gu and co-workers melt-infi ltrated the photochromic dyes 1,3-dihydro- [ 1 , 4 ] oxazine] or cis -1,2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl) ethane into silica opal fi lms prepared by vertical deposition on glass substrates. [ 35 ] Photoinduced switching between geometric isomers of the dye resulted in a red shift of the stop band with UV light and a blue shift with light at a wavelength of 600 nm. Although the refl ection peak shifted by only 15 nm, the shifts were well controlled with response times of less than a minute.…”

Section: Dyesmentioning

confidence: 99%

Tunable Colors in Opals and Inverse Opal Photonic Crystals

Aguirre¹,

Reguera²,

Stein

2010

Adv Funct Materials

546

417

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Colloidal photonic crystals and materials derived from colloidal crystals can exhibit distinct structural colors that result from incomplete photonic band gaps. Through rational materials design, the colors of such photonic crystals can be tuned reversibly by external physical and chemical stimuli. Such stimuli include solvent and dye infi ltration, applied electric or magnetic fi elds, mechanical deformation, light irradiation, temperature changes, changes in pH, and specifi c molecular interactions. Reversible color changes result from alterations in lattice spacings, fi lling fractions, and refractive index of system components. This review article highlights the different systems and mechanisms for achieving tunable color based on opaline materials with closepacked or non-close-packed structural elements and inverse opal photonic crystals. Inorganic and polymeric systems, such as hydrogels, metallopolymers, and elastomers are discussed.

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Section: Dyesmentioning

confidence: 99%

Tunable Colors in Opals and Inverse Opal Photonic Crystals

Aguirre¹,

Reguera²,

Stein

2010

Adv Funct Materials

546

417

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“…Hence, a photochromic switch at these wavelengths must exploit changes in other optical properties, besides absorption, resulting from the photochromic reaction. For the fiber-based all-optical switch reported here, we adopt the most direct approach, [10][11][12] which is to utilize the refractive index changes induced by the changes in the electronic delocalization in the chromophore. 13,14 5-chloro-1,3-dihydro-1,3,3-trimethylspiro-͓2H-indole-2,3Ј-͑3H͒phenanthr͓9,10-b͔͑1,4͒oxazine͔ ͑SPO͒, whose structure is shown in Fig.…”

mentioning

confidence: 99%

Spiro-oxazine photochromic fiber optical switch

Huang

Liang

Poon

et al. 2006

Applied Physics Letters

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A photochromic all-optical switch in telecommunication-grade fiber is fabricated by filling a fiber Bragg grating Fabry-Pérot resonator with a spiro-oxazine solution. The narrow linewidth of the resonator allows for a high sensitivity of the resonance wavelengths to the index change. The switch is controlled by low intensity UV light exposure, and operation at infrared telecommunication wavelengths is demonstrated. The switching speed on the order of minutes has been achieved.

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“…The diffraction peak switched upon irradiations with UV or visible light. Photonic crystal structures for photonic band tuning have been investigated in other systems including low-molar-mass azobenzene, and spiropyran [50][51][52][53][54]. Based on these rapid advances, realization of high-performance active photonic crystals can be expected.…”

Section: Colloidal Crystalsmentioning

confidence: 99%

Optical and Physical Applications of Photocontrollable Materials: Azobenzene-Containing and Liquid Crystalline Polymers

2012

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Photocontrol of molecular alignment is an exceptionally-intelligent and useful strategy. It enables us to control optical coefficients, peripheral molecular alignments, surface relief structure, and actuation of substances by means of photoirradiation. Azobenzene-containing polymers and functionalized liquid crystalline polymers are well-known photocontrollable materials. In this paper, we introduce recent applications of these materials in the fields of mechanics, self-organized structuring, mass transport, optics, and photonics. The concepts in each application are explained based on the mechanisms of photocontrol. The interesting natures of the photocontrollable materials and the conceptual applications will stimulate novel ideas for future research and development in this field.

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Photo-Reversible Regulation of Optical Stop Bands

Cited by 70 publications

References 8 publications

Tunable Colors in Opals and Inverse Opal Photonic Crystals

Tunable Colors in Opals and Inverse Opal Photonic Crystals

Spiro-oxazine photochromic fiber optical switch

Optical and Physical Applications of Photocontrollable Materials: Azobenzene-Containing and Liquid Crystalline Polymers

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