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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) |
Files in This Item:
File | Description | Size | Format | |
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2019_OSA Consortium_Vol.2_p1326-1341.pdf Restricted Access | Restricted Access. | 3.74 MB | Adobe PDF | View/Open Request a copy |
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