Title :
Realization of tunable microsphere resonators suspended in liquid via dielectrophoretic force
Author :
Te-Chang Chen ; Tse-Jen Liao ; Lee, Ming-Chang M.
Author_Institution :
Inst. of Photonics Technol., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
A new control mechanism to realize tunable microsphere resonators suspended in liquid is proposed. Via adjusting the bias voltage across an inhomogeneous dielectric structure (a rib waveguide plus microsphere), the microsphere resonator is attracted and levitated on top of the single-mode rib waveguide via an repulsive dielectrophoretic (DEP) force, where the coupling gap between the microsphere resonator and the waveguide is precisely controlled. The tunable gap spacing is analyzed by calculating the dielectrophoretic force through Maxwell stress tensor.
Keywords :
Maxwell equations; electrophoresis; micro-optics; microcavities; micromechanical resonators; radiation pressure; rib waveguides; tensors; Maxwell stress tensor; bias voltage; control mechanism; inhomogeneous dielectric structure; liquid suspended microsphere resonator; optoelectronic tweezer; repulsive dielectrophoretic force; rib waveguide plus microsphere; single mode rib waveguide; tunable microsphere resonator; Couplings; Force; Liquids; Optical resonators; Optical waveguides; Q-factor; Waveguide discontinuities; DEP; OET and WGM;
Conference_Titel :
Next-Generation Electronics (ISNE), 2015 International Symposium on
Conference_Location :
Taipei
DOI :
10.1109/ISNE.2015.7132037
