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- Title
Optical Stiffness of an Optically Trapped 4-Cyano-4’-Pentylbiphenyl (5CB) in the form of a Microdroplet in Water.
- Authors
Mat Yeng, Muhamad Safuan; Ayop, Shahrul Kadri; Mustapa, Izan Roshawaty; Sasaki, Keiji
- Abstract
This study aimed to determine the optical stiffness (𝑘𝑇) of an optical trap system consisting of liquid crystal of 4-Cyano-4’-Pentylbiphenyl (5CB) in the form of a microdroplet in water. The optical stiffness is an essential parameter for calibrating optical trapping for force related measurements and microactuating applications. A 0.5 µL of 5CB was dispersed in 2 mL of deionized water to produce a solution with a 5CB microdroplet. The optical tweezers with a 976 nm laser were used to optically trap a single 5CB microdroplet. It was found that 1.1 µm diameter 5CB microdroplet showed a varied relationship of corner frequency and optical stiffness at increasing laser power density due to weak trapping. However, 2.0 µm diameter 5CB microdroplet showed an increasing relationship of corner frequency and optical stiffness at increasing laser power density in stable trapping conditions. Thus, the diameter of the 5CB microdroplet has a significant effect on stable optical trapping. This study was expected to contribute to the control precision for LC-based sensing and actuating applications.
- Publication
Central Asia & the Caucasus (14046091), 2022, Vol 23, Issue 1, p3008
- ISSN
1404-6091
- Publication type
Academic Journal
- DOI
10.37178/ca-c.21.5.085