Dasgupta, Raktim ; Verma, Ravi Shanker ; Ahlawat, Sunita ; Chaturvedi, Deepa ; Gupta, Pradeep Kumar (2011) Long distance axial trapping with Laguerre-Gaussian beams Applied Optics, 50 (10). pp. 1469-1476. ISSN 0003-6935
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Official URL: http://www.opticsinfobase.org/abstract.cfm?URI=ao-...
Related URL: http://dx.doi.org/10.1364/AO.50.001469
Abstract
We show that the axial spread of the focal volume of a tightly focused beam propagating through a glass-water interface is much reduced for Laguerre-Gaussian (LG) modes as compared to the TEM00 mode. Therefore, use of the LG beam helps in achieving a significant improvement of the axial trapping range in optical tweezers. We demonstrate the use of LG modes to manipulate biological cells from the bottom layer of the medium to the top surface layer. Exposure of the cells to a higher oxygen concentration at the surface layer is used for estimation of the intramembrane oxygen diffusion rate.
Item Type: | Article |
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Source: | Copyright of this article belongs to Optical Society of America. |
ID Code: | 83465 |
Deposited On: | 21 Feb 2012 12:58 |
Last Modified: | 21 Feb 2012 12:58 |
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