Tunable optofluidic switch via hydrodynamic control of laminar flow rate

Seow, Y. C.; Lim, S. P.; Lee, H. P.
September 2009
Applied Physics Letters;9/14/2009, Vol. 95 Issue 11, p114105
Academic Journal
This letter reports a tunable planar optofluidic switch as illustrated by three laminar flow streams introduced into a focusing chamber. Different width of liquid core can be tuned via the imposed flow rate of these three laminar flow streams. The hydrodynamic tunability of the core-cladding interfaces is the key to realize microscale optical switching via total internal reflection. The optical switching capability is demonstrated having good agreement with optical simulations. The optofluidic optical switch can achieve a switching speed of 1.56 Hz and beyond with the potential for a seamless integration with other lab-on-a-chip devices for optical sensing applications.


Related Articles

  • Hydrodynamics and heat transfer in channels with circular fins. Zubkov, P.; Tarasova, E. // High Temperature;Nov2004, Vol. 42 Issue 6, p928 

    Numerical analysis is performed of the hydrodynamics and heat transfer under conditions of a steady-state fully developed flow of a viscous incompressible liquid in a round pipe with internal circular fins. A numerical model is constructed for the calculation of laminar flows with a constant...

  • Shear-affected depletion interaction. July, C.; Kleshchanok, D.; Lang, P. // European Physical Journal E -- Soft Matter;Jul2012, Vol. 35 Issue 7, p1 

    We investigate the influence of flow fields on the strength of the depletion interaction caused by disc-shaped depletants. At low mass concentration of discs, it is possible to continuously decrease the depth of the depletion potential by increasing the applied shear rate until the depletion...

  • Simplified attenuated total reflection apparatus. Villagrán, J. C.; Thompson, J. C. // Review of Scientific Instruments;Jun89, Vol. 60 Issue 6, p1201 

    We offer a version of the Kretschmann configuration of an attenuated total reflection measurement in which there is only one rotating element. Significant simplifications in construction and operation are thereby attained.

  • Hindered diffusion of colloidal particles very near to a wall: Revisited. Bevan, Michael A.; Prieve, Dennis C. // Journal of Chemical Physics;7/15/2000, Vol. 113 Issue 3 

    Total internal reflection microscopy is a technique for monitoring changes in the distance between a single microscopic sphere and a flat plate by measuring the intensity of light scattered by the sphere when illuminated by an evanescent wave. A histogram of scattering intensities can be used to...

  • Enlargement of omnidirectional total reflection frequency range in one-dimensional photonic crystals by using photonic heterostructures. Wang, Xin; Hu, Xinhua; Li, Yizhou; Jia, Wulin; Xu, Chun; Liu, Xiaohan; Zi, Jian // Applied Physics Letters;6/10/2002, Vol. 80 Issue 23, p4291 

    We show theoretically that the omnidirectional total reflection frequency range of a multilayer dielectric reflector can be substantially enlarged as desired by using photonic heterostructures. This photonic heterostructure consists of different one-dimensional (1D) photonic crystals. The...

  • Fokker–Planck analysis of separation dependent potentials and diffusion coefficients in simulated microscopy experiments. Beltran-Villegas, Daniel J.; Sehgal, Ray M.; Maroudas, Dimitrios; Ford, David M.; Bevan, Michael A. // Journal of Chemical Physics;1/28/2010, Vol. 132 Issue 4, p044707 

    Total internal reflection microscopy (TIRM) and video microscopy (VM) are methods for nonintrusively measuring weak colloidal interactions important to many existing and emerging applications. Existing analyses of TIRM measured single particle trajectories can be used to extract particle-surface...

  • Fast Benchtop Fabrication of Laminar Flow Chambers for Advanced Microscopy Techniques. Courson, David S.; Rock, Ronald S. // PLoS ONE;2009, Vol. 4 Issue 8, p1 

    Background: Fluid handling technology is acquiring an ever more prominent place in laboratory science whether it is in simple buffer exchange systems, perfusion chambers, or advanced microfluidic devices. Many of these applications remain the providence of laboratories at large institutions with...

  • Penetration of a negatively buoyant jet in a miscible liquid. Philippe, P.; Raufaste, C.; Kurowski, P.; Petitjeans, P. // Physics of Fluids;May2005, Vol. 17 Issue 5, p053601 

    We report experimental results on the evolution of a laminar liquid jet injected with negatively buoyant condition in a miscible surrounding liquid. Since molecular diffusion is negligible, the only significant miscible effect is the absence of any surface tension. After an initial intrusion...

  • Numerical investigation of the stability of bubble train flow in a square minichannel. Öztaskin, Murat C.; Wörner, Martin; Soyhan, Hakan S. // Physics of Fluids;Apr2009, Vol. 21 Issue 4, p042108 

    The stability of a train of equally sized and variably spaced gas bubbles that move within a continuous wetting liquid phase through a straight square minichannel is investigated numerically by a volume-of-fluid method. The flow is laminar and cocurrent upward and driven by a pressure gradient...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics