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Characterization of a Binary Subwavelength Diffractive Lens

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Abstract

We demonstrate a subwavelength lens with a measured 65-µm focal length and 36-µm aperture (f/1.75). Ring pitch is approximately 160 nm and the minimum ring width is less than 60 nm. The lens was fabricated in SiO with an etch depth of 400 nm.

© 2000 Optical Society of America

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