Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/138181
Title: ENGINEERING COMPLEX LIGHT-MATTER INTERACTION FOR ADVANCED OPTICAL MICROMANIPULATION
Authors: ZHANG TIANHANG
Keywords: Optical manipulation, Optical force, Light-matter interaction, Structured beam, Chirality sorting, Reconfigurable optical manipulation
Issue Date: 4-Aug-2017
Source: ZHANG TIANHANG (2017-08-04). ENGINEERING COMPLEX LIGHT-MATTER INTERACTION FOR ADVANCED OPTICAL MICROMANIPULATION. ScholarBank@NUS Repository.
Abstract: By properly engineering the properties of the three components of light-matter interaction (the incident beam, the manipulated objects and the surrounding environment), a number of advanced optical manipulations could be achieved. As first part, by using complex structured beams and properly tailoring their polarization states, all-optical sorting of chiral objects is demonstrated via reversible lateral forces. In addition, by engineering the environment surrounding the chiral objects, the chirality sorting is also achieved at the interface between two media. Second, the first demonstration of a deep subwavelength optical spanner based on evanescent optical vortex wave which relies more on the complexness of the incident field is presented. Finally, I demonstrated the reconfigurable optical manipulations of nanoscale objects based on the phase change material Ge2Sb2Te5 (GST) waveguides and bowtie antennas on GST substrates. In summary, advanced optical manipulation of pushing/pulling, trapping, hopping, rotating and sorting are demonstrated by engineering the light-matter interactions.
URI: http://scholarbank.nus.edu.sg/handle/10635/138181
Appears in Collections:Ph.D Theses (Open)

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