Optical microresonator arrays of fluorescence-switchable diarylethenes with unreplicable spectral fingerprints,Materials Horizons

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Optical microresonator arrays of fluorescence-switchable diarylethenes with unreplicable spectral fingerprints
Materials Horizons ( IF 12.2 ) Pub Date : 2020-05-06 , DOI: 10.1039/d0mh00566e
Daichi Okada _{1,

2,

3,

4,

5} , Zhan-Hong Lin _{6,

7,

8} , Jer-Shing Huang _{6,

7,

8,

9,

10} , Osamu Oki _{1,

2,

3,

4,

5} , Masakazu Morimoto _{5,

11,

12,

13} , Xuying Liu _{4,

5,

14,

15} , Takeo Minari _{4,

5,

14,

15} , Satoshi Ishii _{4,

5,

14,

15,

16} , Tadaaki Nagao _{4,

5,

14,

15,

16} , Masahiro Irie _{5,

11,

12,

13} , Yohei Yamamoto _{1,

2,

3,

4,

5}

Affiliation

Department of Materials Science and Tsukuba Research Center for Energy Materials Science (TREMS)
Faculty of Pure and Applied Sciences
University of Tsukuba
Tsukuba
Japan
Nanooptics Research Group, Leibniz Institute of Photonic Technology
Jena D-07745
Germany
Research Center for Applied Sciences
Academia Sinica
Department of Chemistry and Research Center for Smart Molecules
Rikkyo University
Toshima-ku
International Center for Materials Nanoarchitectonics (WPI-MANA) and Center for Functional Sensor & Actuator (CFSN)
National Institute for Materials Science (NIMS)
CREST

High-security identification requires authentication that is hard to counterfeit and replicate. For anti-counterfeiting data storage and rewritable memory devices, chromic materials are adoptable, where the dichromatic colours can be switched by external stimuli. If further individual information is embedded in each pixel, a much higher-level security system beyond the zero/one data array will be realized. For this purpose, a fine whispering gallery mode (WGM) fingerprint pattern from a microresonator is applicable. Here we propose that photoswitchable optical microresonators made of a fluorescent photochromic organic material function as anti-counterfeiting, rewritable optical memories. The WGM photoluminescence of the resultant microspheres can be switched on and off repeatedly by irradiation with ultraviolet and visible light. The shape of the microresonator varies from a sphere to an oblate ellipsoid and hemisphere, depending on the self-assembly process, and the WGM spectral pattern depends sensitively on the morphology of the resonators. Furthermore, surface self-assembly on a hydrophobic/hydrophilic micropatterned substrate affords a highly integrated array of microresonators as dense as millions of pixels per square centimetre. The spectral fingerprints of all pixels are different from one another; therefore, the photoswitchable microarrays are applicable as an ultimate anti-counterfeiting system which is hard to replicate.

中文翻译：

具有不可复制的光谱指纹的荧光可切换二硫醚的光学微谐振器阵列

高安全性的身份验证要求进行身份验证，该身份很难伪造和复制。对于防伪数据存储和可重写存储设备，可采用铬材料，其中可通过外部刺激来切换双色颜色。如果在每个像素中嵌入更多的个人信息，则将实现超出零/一数据阵列的更高级别的安全系统。为此，可以使用来自微谐振器的细密耳语画廊模式（WGM）指纹图案。在这里，我们提出，由荧光光致变色有机材料制成的光可开关光学微谐振器起着防伪，可重写光学存储器的作用。所得微球的WGM光致发光可通过用紫外线和可见光照射而反复打开和关闭。微谐振器的形状从球体到扁球形和半球形，取决于自组装过程，并且WGM光谱图敏感地取决于谐振器的形态。此外，疏水/亲水微图案化基材上的表面自组装提供了密度高达每平方厘米数百万个像素的微谐振器高度集成阵列。所有像素的光谱指纹互不相同。因此，光开关微阵列可作为难以复制的终极防伪系统。疏水/亲水微图案化基材上的表面自组装可提供高度集成的微谐振器阵列，密度高达每平方厘米数百万个像素。所有像素的光谱指纹互不相同。因此，光开关微阵列可作为难以复制的终极防伪系统。疏水/亲水微图案化基材上的表面自组装可提供高度集成的微谐振器阵列，密度高达每平方厘米数百万个像素。所有像素的光谱指纹互不相同。因此，光开关微阵列可作为难以复制的终极防伪系统。

更新日期：2020-07-06

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