Deformation of single cells - Optical two-beam traps and more

Kirstine Sandager Nielsen, Tony B. Rungling, Morten Hanefeld Dziegiel, Rodolphe Marie, Kirstine Berg-Sørensen*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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An optical two-beam trap composed from two counter propagating laser beams is an interesting setup due to the ability of the system to trap, hold, and stretch soft biological objects like vesicles or single cells. Because of this functionality, the system was also named the optical stretcher by Jochen Guck, Josep Kaas and co-workers almost 20 years ago. In a favorable setup, the two opposing laser beams meet with equal intensities in the middle of a fluidic channel in which cells may ow past, be trapped, stretched, and allowed to move on, giving the promise of a high throughput device. Yet, single beam optical traps, aka optical tweezers, by far outnumber the existing optical stretchers in research labs throughout the world. The ability to easily construct an optical stretcher setup in a low-cost material would possibly imply more frequent use of the optical stretching technique. Here, we discuss advantages and disadvantages of choice of material and methodology for chip assembly and chip production. For high throughput investigations of stretching deformation of single cells, optical stretching is, however, out-performed by hydrodynamic deformability assays. As we will discuss, injection molded polymer chips may with advantage be applied both for optical stretching and for hydrodynamic deformability experiments.

Original languageEnglish
Title of host publicationComplex Light and Optical Forces XIII
EditorsEnrique J. Galvez, David L. Andrews, Jesper Gluckstad
Number of pages9
PublisherSPIE - International Society for Optical Engineering
Publication date2019
Article number1093516
ISBN (Electronic)9781510625129
Publication statusPublished - 2019
EventComplex Light and Optical Forces XIII - The Moscone Center, San Francisco, United States
Duration: 5 Feb 20197 Feb 2019
Conference number: 28


ConferenceComplex Light and Optical Forces XIII
LocationThe Moscone Center
Country/TerritoryUnited States
CitySan Francisco
SeriesProceedings of SPIE - The International Society for Optical Engineering


  • Optical and hydrodynamic stretching
  • Polymer micro uidic chips
  • Red blood cells
  • Single cell biophysics


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