Journal ArticleDOI
Micro-technology for anti- counterfeiting
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TLDR
In this article, the use of electron beam lithography (EBL) techniques to produce novel diffractive optical microstructures for use as anti-counterfeiting devices is discussed.About:
This article is published in Microelectronic Engineering.The article was published on 2000-06-01. It has received 47 citations till now. The article focuses on the topics: Electron-beam lithography.read more
Citations
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Journal ArticleDOI
Inkjet Printing Based Mono-layered Photonic Crystal Patterning for Anti-counterfeiting Structural Colors
TL;DR: It is demonstrated that SAPC patterns on a white background are covert under daylight, such that pattern detection can be avoided, but they become overt in a simple manner under strong illumination with smartphone flash light and/or on a black background, showing remarkable potential for anti-counterfeit techniques.
Journal ArticleDOI
Bioinspired micrograting arrays mimicking the reverse color diffraction elements evolved by the butterfly Pierella luna
Grant T. England,Mathias Kolle,Mathias Kolle,Philseok Kim,Mughees Khan,Philip Munoz,Eric Mazur,Joanna Aizenberg +7 more
TL;DR: A bioinspired photonic material is presented that mimics the reverse color-order diffraction found in the butterfly Pierella luna and could provide a basis for novel developments in biosensing, anticounterfeiting, and efficient light management in photovoltaic systems and light-emitting diodes.
Journal ArticleDOI
Dual-Coded Plasmene Nanosheets as Next-Generation Anticounterfeit Security Labels
Kae Jye Si,Debabrata Sikdar,Lim Wei Yap,Jeremy Kee Keong Foo,Pengzhen Guo,Qianqian Shi,Malin Premaratne,Wenlong Cheng +7 more
Journal ArticleDOI
3D Fluorescence-Based Security Features by 3D Laser Lithography
TL;DR: 3D optical security features manufactured by multistep 3D optical laser lithography are presented in this article, which are composed of a nonfluorescent 3D cross-grid scaffold and fluorescent markers, realized by an acrylate-based resist containing CdSSe-based core-shell semiconductor quantum dots.
Journal ArticleDOI
Printing via hot embossing of optically variable images in thermoplastic acrylic lacquer
TL;DR: In this paper, a novel printing process via hot embossing of either grating or micro-mirror microstructures has been demonstrated in thermoplastic acrylic lacquer.
References
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Patent
Multiple image diffractive device
TL;DR: A diffractive device has a surface relief structure which, when illuminated by a light source, generates at least two diffraction images which can be observed from particular ranges of viewing angles around the device as mentioned in this paper.
Patent
Diffractive indicia for a surface
TL;DR: Diffractive indicia as discussed by the authors is a set of small separate diffractive elements, each of which has a diffractive surface relief structure and is not separately resolvable to the human eye.
Patent
Diffraction grating and method of manufacture
TL;DR: In this paper, a pixellated diffraction grating is used to generate an optically variable image, where each pixel of the image is mapped to a pixel of a corresponding pixel in the diffracting grating.
Patent
A diffractive device
TL;DR: In this paper, a diffractive device has a surface relief structure which, when illuminated by a light source, generates one or more diffraction images which are observable from particular ranges of viewing angles around the device.
Patent
Diffractive structure with interstitial elements
TL;DR: A diffractive device has a surface relief structure which, when illuminated by a light source, generates one or more diffraction images which are observable from particular ranges of viewing angles around the device as mentioned in this paper.