Journal
APPLIED PHYSICS LETTERS
Volume 89, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2235855
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A phase-change nanolithography technique is developed to fabricate up to millions of two-/three-dimensional nanostructures (similar to 50 nm) over a large area at a high speed by combining femtosecond laser, microlens array, and wet etching process. Near-field scanning optical microscopy, electrical force microscopy, and atomic force microscopy were used to characterize optical and electrical properties of crystalline and amorphous states, respectively. Different reactions of both amorphous and crystalline areas in phase-change film to alkaline solution are demonstrated. Multiphoton absorption and ultrashort pulse contribute to nanostructure generation. This method opens up a route for nanodevice fabrication with phase-change material.
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