School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
Lab Chip. 2011 Dec 7;11(23):4047-51. doi: 10.1039/c1lc20574a. Epub 2011 Oct 19.
We demonstrate the trapping of particles with silicon microring resonators integrated with waveguides. Multiple microrings with different resonant wavelengths are integrated with each waveguide. We demonstrate that tuning the laser wavelength to the resonance wavelengths of different rings enables trapped particles to be transferred back and forth between the rings. We demonstrate that the change in output power arising from particle-induced resonance shift enables the real-time monitoring of trapped particles, such as their number and velocities, without the need for an external imaging system. The techniques we describe here could form the basis for small footprint systems in which objects are moved between multiple locations on a chip, at each of which different operations are performed and the objects' properties sensed.
我们展示了通过与波导集成的硅微环谐振器来捕获粒子。每个波导都集成了多个具有不同谐振波长的微环。我们证明，通过将激光波长调谐到不同环的谐振波长，可以在环之间来回传输被捕获的粒子。我们证明，由于粒子引起的共振位移引起的输出功率变化可以实时监测被捕获的粒子，例如它们的数量和速度，而无需外部成像系统。我们在这里描述的技术可以为小型系统奠定基础，在这些系统中，物体在芯片上的多个位置之间移动，在每个位置执行不同的操作并感测物体的特性。
