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Encryption of Photonic Crystals for security packing

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Encryption of Photonic Crystals for security packing
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Encryption of holographic photonic crystal for security packing
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22
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61
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CC Attribution 3.0 Unported:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Abstract
This paper proposes a holographic technique to encrypt 2D photonic crystals (PhCs) into embossed holographic security packing materials for anti-counterfeiting. Special diffraction patterns can be obtained from 2D PhCs with certain lattice structures and observed using inexpensive laser pointers. Since there are high technical requirements in fabricating PhCs, packing materials with PhCs encryption have high authentication power. Theoretical design and fabrication of a master with 2D PhC encryption and its application in security packing are presented.