TY - GEN
T1 - A liquid optical tip via control of flow rate
AU - Yang, Yi
AU - Liu, Ai Qun
PY - 2009/6
Y1 - 2009/6
N2 - Efficient energy interconversion between light propagation and the localized field of light is important for highly-sensitive biological and chemical detectors. Solid optical tip can effectively enhance optical intensity for the measurement of nanoscale single molecule imaging. However, it lacks dynamic control mechanisms and is difficult to realize a smooth interface which may result in serious loss of scattering. Liquid can be dynamically controlled and the interfaces are optically smooth. Recently, liquid waveguides are reported to exhibit various advantages of dynamic, cheap and low optical loss. In this paper, a liquid optical tip in a microchannel controlled by flow rates is reported. In the design of the optofluidic chip, the core flow stream of the liquid waveguide is formed as Calcium Chloride (CaCl2) flow stream, and the cladding flow stream is formed as dioionzed (DI) water flow stream. The diffusion of CaCl2 between the microfluidic laminar flows establishes a gradient refractive index distribution to make an optical tip. For the optical system, laser source with central wavelength of 633 nm is used as input. The microchannel has a height of 80 μm and a width of 100 μm. The diffusion coefficient is 1 x 10-9 m2/s. The original refractive index of CaCl2 solution and deinized (DI) water are 1.442 and 1.332, respectively. The optical intensity at the optical tip is increased by 15 times sing Finite-Difference Time-Domain (FDTD) method. Thus, light be guided to form a sharp optical tip through the control of liquid. The on-chip optical tip has potential applications in biological, chemical and medical solution detectors.
AB - Efficient energy interconversion between light propagation and the localized field of light is important for highly-sensitive biological and chemical detectors. Solid optical tip can effectively enhance optical intensity for the measurement of nanoscale single molecule imaging. However, it lacks dynamic control mechanisms and is difficult to realize a smooth interface which may result in serious loss of scattering. Liquid can be dynamically controlled and the interfaces are optically smooth. Recently, liquid waveguides are reported to exhibit various advantages of dynamic, cheap and low optical loss. In this paper, a liquid optical tip in a microchannel controlled by flow rates is reported. In the design of the optofluidic chip, the core flow stream of the liquid waveguide is formed as Calcium Chloride (CaCl2) flow stream, and the cladding flow stream is formed as dioionzed (DI) water flow stream. The diffusion of CaCl2 between the microfluidic laminar flows establishes a gradient refractive index distribution to make an optical tip. For the optical system, laser source with central wavelength of 633 nm is used as input. The microchannel has a height of 80 μm and a width of 100 μm. The diffusion coefficient is 1 x 10-9 m2/s. The original refractive index of CaCl2 solution and deinized (DI) water are 1.442 and 1.332, respectively. The optical intensity at the optical tip is increased by 15 times sing Finite-Difference Time-Domain (FDTD) method. Thus, light be guided to form a sharp optical tip through the control of liquid. The on-chip optical tip has potential applications in biological, chemical and medical solution detectors.
KW - Microfluidics
KW - Optical tip
UR - http://www.scopus.com/inward/record.url?scp=73549103153&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.74.331
DO - 10.4028/www.scientific.net/AMR.74.331
M3 - Conference article published in proceeding or book
AN - SCOPUS:73549103153
SN - 0878493212
SN - 9780878493210
T3 - Advanced Materials Research
SP - 331
EP - 334
BT - NEMS/MEMS Technology and Devices - Selected, peer reviewed papers from the International Conference on Materials for Advanced Technologies 2009, ICMAT 2009
T2 - International Conference on Materials for Advanced Technologies, ICMAT 2009
Y2 - 28 June 2009 through 3 July 2009
ER -