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Utilizing the moiré deflectometry-based detection method improves the detection sensitivity for gold nanoparticles trapped by optical tweezers

Reihani, S. N ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1364/JOSAB.424206
  3. Publisher: The Optical Society , 2021
  4. Abstract:
  5. Gold nanoparticles (GNPs) are very often used as handles for nanotechnological micromanipulation. In this regard, optical trapping of GNPs is of great importance, in which locating the trapped GNP within the focal spot with nanometer precision is crucial. Very recently, we have introduced a new position detection system for optical tweezers based on moiré deflectometry (MD). Here we show, both theoretically and experimentally, that an MD detection system could provide significantly larger detection sensitivity for a trapped GNP compared to that provided by conventional back focal plane (BFP) detection systems. For instance, for a trapped 200 nm GNP, the detection sensitivity provided by the MD detection method is 280% better than that provided by the BFP detection method. 0740-3224/21/072135-06 Journal © 2021 Optical Society of America
  6. Keywords:
  7. Fiber optic sensors ; Gold nanoparticles ; Metal nanoparticles ; Back focal planes ; Detection methods ; Detection sensitivity ; Detection system ; Gold nanoparticles (GNPs) ; Micro manipulation ; Nanometer precision ; Opticaltrapping ; Optical tweezers
  8. Source: Journal of the Optical Society of America B: Optical Physics ; Volume 38, Issue 7 , 2021 , Pages 2135-2140 ; 07403224 (ISSN)
  9. URL: https://opg.optica.org/josab/abstract.cfm?uri=josab-38-7-2135