Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7237
Title: Direct femtosecond laser fabricated photon sieve
Authors: Rodrigues, Vanessa R. M.
Dharmadhikari, Jayashree A.
Ramachandran, Hema
+3Co-Authors
Issue Date: 15-Apr-2019
Publisher: Optical Society of America
Citation: OSA Continuum, 2019, Vol.2, p1328-1341
Abstract: Photon sieves, a collection of randomly positioned apertures, focus electromagnetic radiation diffractively and find applications in x-ray optics to astronomy to bio-medical imaging. Femtosecond laser direct writing is an emerging rapid, reliable, and versatile technique for creating diffraction-limited features in dielectrics and metals. Using this technique, we produce localized spots with a modified refractive index within bulk glass and thus fabricate phase photon sieves for optical wavelengths. The distribution of spots was based on numerical simulations. A comparison of the performance of the phase photon sieves and zone-plates created showed a superior performance of the former in terms of tighter focusing and reduction of secondary maxima, thus offering better spatial resolution and imaging capabilities.
Description: Restricted Access.
URI: http://hdl.handle.net/2289/7237
ISSN: 2578-7519
Alternative Location: https://doi.org/10.1364/OSAC.2.001328
Copyright: 2019 Optical Society of America
Appears in Collections:Research Papers (LAMP)

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