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Tight focusing of laser light using a chromium Fresnel zone plate
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dc.contributor.author | Kotlyar, V. V. | |
dc.contributor.author | Stafeev, S. S. | |
dc.contributor.author | Nalimov, A. G. | |
dc.contributor.author | Kotlyar, M. V. | |
dc.contributor.author | O'Faolain, Liam | |
dc.contributor.author | Kozlova, E. S. | |
dc.date.accessioned | 2018-08-06T23:34:34Z | |
dc.date.available | 2018-08-06T23:34:34Z | |
dc.date.issued | 2017-08-21 | |
dc.identifier | 251025910 | |
dc.identifier | 5ad02d6a-8388-4e22-b59f-d84617944d8d | |
dc.identifier | 85027731754 | |
dc.identifier | 000409338000002 | |
dc.identifier.citation | Kotlyar , V V , Stafeev , S S , Nalimov , A G , Kotlyar , M V , O'Faolain , L & Kozlova , E S 2017 , ' Tight focusing of laser light using a chromium Fresnel zone plate ' , Optics Express , vol. 25 , no. 17 , pp. 19662-19671 . https://doi.org/10.1364/OE.25.019662 | en |
dc.identifier.issn | 1094-4087 | |
dc.identifier.uri | https://hdl.handle.net/10023/15776 | |
dc.description | Funding: Russian Scientific Foundation (17-19-01186). | en |
dc.description.abstract | Using near-field scanning microscopy, we demonstrate that a 15-µm zone plate fabricated in a 70-nm chromium film sputtered on a glass substrate and having a focal length and outermost zone's width equal to the incident wavelength λ = 532 nm, focuses a circularly polarized Gaussian beam into a circular subwavelength focal spot whose diameter at the full-width of half-maximum intensity is FWHM = 0.47λ. This value is in near-accurate agreement with the FDTD-aided numerical estimate of FWHM = 0.46λ. When focusing a Gaussian beam linearly polarized along the y-axis, an elliptic subwavelength focal spot is experimentally found to measure FWHMx = 0.42λ (estimated value FWHMx = 0.40λ) and FWHMy = 0.64λ. The subwavelength focal spots presented here are the tightest among all attained so far for homogeneously polarized beams by use of non-immersion amplitude zone plates. | |
dc.format.extent | 10 | |
dc.format.extent | 693605 | |
dc.language.iso | eng | |
dc.relation.ispartof | Optics Express | en |
dc.subject | QC Physics | en |
dc.subject | Atomic and Molecular Physics, and Optics | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.title | Tight focusing of laser light using a chromium Fresnel zone plate | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Microphotonics and Photonic Crystals Group | en |
dc.identifier.doi | https://doi.org/10.1364/OE.25.019662 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2018-08-07 |
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