Mass-producible microscopic computer-generated holograms: microtags

Journal Article · Sun Dec 01 00:00:00 EST 1996 · Optics Letters

DOI:https://doi.org/10.1364/OL.21.001951· OSTI ID:450299

Descour, M R ^[1]; Sweatt, W C ^[2]; Ray-Chaudhuri, A K; Krenz, K D ^[3]; Warren, M E; Kravitz, S H ^[2]; Tichenor, D A; Stulen, R H ^[3]; Love, T L ^[2]

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1. Optical Sciences Center, University of Arizona, Tucson, Arizona 85721 (United States)
2. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
3. Sandia National Laboratories, Livermore, California 94550 (United States)

We have developed a method for encoding phase and amplitude in microscopic computer-generated holograms (microtags) for security applications. An 8{times}8 cell phase-only and an 8{times}8 cell phase-and-amplitude microtag design has been exposed in photoresist by the extreme-ultraviolet (13.4-nm) lithography tool developed at Sandia National Laboratories. Each microtag measures 80 {mu}m{times}160 {mu}m and contains features that are 0.2 {mu}m wide. Fraunhofer zone diffraction patterns can be obtained from fabricated microtags without any intervening optics and compare favorably with predicted diffraction patterns. {copyright} {ital 1996 Optical Society of America.}

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 450299
• Journal Information: Optics Letters, Vol. 21, Issue 23; Other Information: PBD: Dec 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
99 MATHEMATICS
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INFORMATION THEORY
COMPUTER CALCULATIONS
DIFFRACTION
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