School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
Phys Rev Lett. 2012 Jan 27;108(4):048102. doi: 10.1103/PhysRevLett.108.048102.
Heat generation and its impact on DNA transport in the vicinity of an optofluidic silicon photonic crystal resonator are studied theoretically and experimentally. The temperature rise is measured to be as high as 57 K for 10 mW of input power. The resulting optical trapping and biomolecular sensing properties of these devices are shown to be strongly affected by the combination of buoyancy driven flow and thermophoresis. Specifically, the region around the electromagnetic hot spot is depleted in biomolecules because of a high free energy barrier.
理论和实验研究了光流体硅光子晶体谐振器附近的热产生及其对 DNA 传输的影响。测量到的温升高达 10mW 输入功率时的 57K。这些器件的光俘获和生物分子传感特性受到浮力驱动流和热泳的组合的强烈影响。具体而言，由于高自由能势垒，电磁热点周围的区域中生物分子耗尽。
