TY - JOUR
T1 - Direct femtosecond laser fabricated photon sieve
AU - Rodrigues, Vanessa R.M.
AU - Dharmadhikari, Jayashree A.
AU - Dharmadhikari, Aditya K.
AU - Chidangil, Santhosh
AU - Mathur, Deepak
AU - Ramachandran, Hema
N1 - Funding Information:
Joint Manipal Academy of Higher Education and FIST Program of the Department of Science and Technology, Government of India (SR/FT/PSI-174/2012); Science and Engineering Research Board (SERB) of the Department of Science & Technology, Government of India (J. C. Bose National Fellowship (SR/S2/JCB-29/2006)).
Publisher Copyright:
© 2019 Optical Society of America.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/4/15
Y1 - 2019/4/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85069168290&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85069168290&partnerID=8YFLogxK
U2 - 10.1364/OSAC.2.001328
DO - 10.1364/OSAC.2.001328
M3 - Article
AN - SCOPUS:85069168290
SN - 2578-7519
VL - 2
SP - 1328
EP - 1341
JO - OSA Continuum
JF - OSA Continuum
IS - 4
ER -