Abstract
In this paper, we design and characterize a novel small size four-channel biosensor based on the two-dimensional photonic crystal with introducing waveguides and nano-cavities in the hexagonal lattice of air pores in the silicon slab. By removing a group of air pores, waveguides are achieved, and nano-cavities are shaped by modifying the radius of air pores. Highly parallel operation of this biosensor due to the special architecture is the capability of the designed structure. The biomaterials which are suspended in a liquid medium inside nano-cavities cause effective refractive index changes which lead to the resonant wavelength shift in the output terminal. According to results, with increasing the refractive index of nano-cavities, resonant wavelengths shifts to longer values. For biochemical sensing like DNA molecule and protein and for the refractive index detection, this novel designed biosensor can be utilized.
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Olyaee, S., Najafgholinezhad, S. & Alipour Banaei, H. Four-channel label-free photonic crystal biosensor using nanocavity resonators. Photonic Sens 3, 231–236 (2013). https://doi.org/10.1007/s13320-013-0110-y
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DOI: https://doi.org/10.1007/s13320-013-0110-y