Journal
OPTICS EXPRESS
Volume 17, Issue 15, Pages 12418-12423Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.012418
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Funding
- Air Force Office of Scientific Research [FA9550-08-1-0349]
- National Science Foundation [ECCS-0801922, ECCS-0609128]
- Penn State Center for Nanoscale Science (MRSEC)
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0801922] Funding Source: National Science Foundation
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Electrically switchable phase-type fractal zone plates and fractal photon sieves were fabricated using polymer-dispersed liquid crystal material based on a photomask. While both exhibited similar first-order diffraction behavior, the fractal photon sieves showed greatly suppressed diffraction at higher orders. Compared with current amplitude-type photomasks, our switchable, phase-type devices demonstrated higher diffraction efficiency, an important factor in the future development of adaptive optics. (C) 2009 Optical Society of America
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