微流体光学要点分析.ppt

Optofluidic Technology and Its Applications微流控光学技术及其应用;OUTLINE;I. Introduction;What Is Optofluidics?;Origins of Optofluidic Technology;Optics + Fluid;Change of Refractive Index;Liquid Mirror Telescope;Thin-film transistors (TFT) active matrix liquid crystal displays (AMLCD);Microfluidic System — Lab on a Chip;微流控技术的定义;Microfluidics + Optics;Typical Structure of Optofluidic Device;e–g, The range of scales involved in the fabricated device will typically span from subwavelength ( tens to hundreds of nanometres) for the optical structures，to tens and hundreds of millimetres for the microfluidic structures.;II. Physics Basis;Liquid Flow in Microchannels;Liquid Flow in Microchannels;Electrokinetic Phenomena（动电现象）;Electroosmosis(电渗);Electrowetting;II. CHIP FABRICATION;;Soft lithography;Replica Molding(模塑法）;PDMS Valve;PDMS Pump;PDMS Multiplexor;Examples of PDMS Chips;Microfluidic Integration Chips;;IV. POTENTIAL APPLICATIONS;Category of Optofluidic devices ;Fluids in solids;GRIN Waveguide ;2x2 optical microfluidic switch;Photonic Switching Platform ;Working Principle;Periodic Array of voids;Optofluidic Lens Array;The fabrication process for integrating microfluidics on bottom of the microlens array (the dotted lines represent a microchannel that connects the two chambers but is not on the same plane as the above cross-sectional view).;25×40 Microfluidic Chamber Array;Memory or Display;Sensor;Mach-Zehnder interferometer;Spectral response for the tunable microfludic interferometer using analytic expressions. The different lines give the response for different interface locations as depicted in the schematic insets shown right. The inset graph summarizes the resonance depth at 1.31mm as a function of meniscus detuning.;Optofluidic Microscope (OFM) ;Demetri Psaltis, Stephen R. Quake Changhuei Yang, Nature 442, 381-386(27 July 2006) ;;Optofluidic filter based on micro-ring resonator; b, At resonance, light travelling in the waveguide will be strongly attenuated. The