Mass-producible microscopic computer-generated holograms: microtags

Journal Article · Sat Nov 30 23:00:00 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 Laboratory
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 450299
• Journal Information: Optics Letters, Journal Name: Optics Letters Journal Issue: 23 Vol. 21; ISSN 0146-9592; ISSN OPLEDP
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
99 GENERAL AND MISCELLANEOUS
COMPUTER CALCULATIONS
DESIGN
DIFFRACTION
HOLOGRAPHY
INFORMATION THEORY
SECURITY
USES
VISIBLE RADIATION