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Title: Measuring the complex field scattered by single submicron particles

We describe a method for simultaneous measurements of the real and imaginary parts of the field scattered by single nanoparticles illuminated by a laser beam, exploiting a self-reference interferometric scheme relying on the fundamentals of the Optical Theorem. Results obtained with calibrated spheres of different materials are compared to the expected values obtained through a simplified analytical model without any free parameters, and the method is applied to a highly polydisperse water suspension of Poly(D,L-lactide-co-glycolide) nanoparticles. Advantages with respect to existing methods and possible applications are discussed.
Authors:
;  [1] ;  [2] ;  [2] ;  [1]
  1. Department of Physics, University of Milan, via Celoria, 16 – I-20133 Milan (Italy)
  2. (Italy)
Publication Date:
OSTI Identifier:
22492200
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 11; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; DATA; GLYCOLS; INTERFEROMETRY; LASER RADIATION; NANOPARTICLES; OPTICAL THEOREM; ORGANIC POLYMERS; SPHERES; SUSPENSIONS; WATER