Srivastava T.Das R.Jha R.2025-02-17201111http://dx.doi.org/10.1016/j.snb.2011.03.057https://idr.iitbbs.ac.in/handle/2008/123A highly sensitive surface plasmon resonance (SPR) sensor based on channel photonic crystal waveguide (PCW) is proposed. The PCW is based on widely used lithographic and nano-fabrication compatible materials like TiO2 and SiO2. Gold has been used as a SPR active metal. By rigorously optimizing the different waveguide parameters, we have shown that there is significant transfer of modal power around phase-matching or resonance wavelength which has been utilized to design a compact and highly sensitive sensor for lab on chip. The ultra narrow width (?765 pm for an interaction length of 10 mm) of surface plasmon resonance curve and sensitivity as high as 7500 nm-RIU-1 will open a new window for bio-chemical sensing applications. � 2011 Elsevier B.V. All rights reserved.enPhotonic crystalSensorSurface plasmon resonanceArticle