title: Dynamic manipulation of modes in an optical waveguide using dielectrophoresis.
abstract: The emergence of optofluidics has brought a high degree of tuneability and reconfigurability to optical devices. These possibilities are provided by characteristics of fluids including mobility, wide range of index modulation, and abrupt interfaces that can be easily reshaped. In this work, we created a new class of optofluidic waveguides, in which suspended mesoparticles were employed to greatly enhance the flexibility of the system. We demonstrated tuneable quasi single mode waveguides using spatially controllable mesoparticles in optofluidics. The coupling of waveguiding modes into the assembly of mesoparticles produces strong interactions and resonant conditions, which promote the transitions of the waveguiding modes. The modal response of the system depends on the distribution of packed particles above the polymeric rib waveguide which can be readily controlled under the appropriate combination of dielectrophoresis and hydrodynamic forces.
authors: School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia. aminkayani@gmail.com
authors: Aminuddin A
authors: AA
authors: Kayani
authors: Khashayar
authors: K
authors: Khoshmanesh
authors: Thach G
authors: TG
authors: Nguyen
authors: Gorgi
authors: G
authors: Kostovski
authors: Adam F
authors: AF
authors: Chrimes
authors: Mahyar
authors: M
authors: Nasabi
authors: Daniel A
authors: DA
authors: Heller
authors: Arnan
authors: A
authors: Mitchell
authors: Kourosh
authors: K
authors: Kalantar-zadeh
mesh_terms: D004586:Electrophoresis / Q000295:instrumentation*; D004867:Equipment Design; D057446:Hydrodynamics; D008027:Light; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation