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Tight focusing with a binary microaxicon

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KotlyarOpticsLetters2011TightFocusing.pdf (344.9Kb)
Date
15/08/2011
Author
Kotlyar, Victor V
Stafeev, S S
O'Faolain, Liam
Soifer, V A
Funder
EPSRC
Grant ID
EP/H00680X/1
Keywords
QC Physics
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Abstract
Using a near-field scanning microscope (NT-MDT) with a 100nm aperture cantilever held 1 μm apart from a microaxicon of diameter 14 μm and period 800nm, we measure a focal spot resulting from the illumination by a linearly polarized laser light of wavelength λ ¼ 532nm, with itsFWHMbeing equal to 0:58λ, and the depth of focus being 5:6λ. The rms deviation of the focal spot intensity from the calculated value is 6%. The focus intensity is five times larger than the maximal illumination beam intensity.
Citation
Kotlyar , V V , Stafeev , S S , O'Faolain , L & Soifer , V A 2011 , ' Tight focusing with a binary microaxicon ' , Optics Letters , vol. 36 , no. 16 , pp. 3100-3102 . https://doi.org/10.1364/OL.36.003100
Publication
Optics Letters
Status
Peer reviewed
DOI
https://doi.org/10.1364/OL.36.003100
ISSN
0146-9592
Type
Journal article
Rights
© 2011 Optical Society of America
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/2873

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