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Optica Publishing Group
  • CLEO/Europe and EQEC 2009 Conference Digest
  • (Optica Publishing Group, 2009),
  • paper EF5_4

Surface Nonlinear Light Generation in Microresonators

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Abstract

The resonance shift produced by molecules bound to the outer surface of toroidal resonators [1] proved that such resonators or other type of circular cavities could become an essential tool for the detection of very small concentrations of molecules. The high sensitivity of devices based on such type of micro-resonators resides on the high value of the quality factor for the cavity (Q~108) and on an evanescent field that penetrates the surrounding medium. [2] The performance of such micro resonators as sensors could be enhanced if the molecule to be detected played a direct role in the light generation process. In a process such as surface second harmonic generation (SHG) in total internal reflection geometry not only the propagation but also the light generation within the micro-resonator is directly related to the chemical composition of the surface.

© 2009 IEEE

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