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Highly accurate and sensitive surface plasmon resonance sensor based on channel photonic crystal waveguides |
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| Authors: | Triranjita SrivastavaAuthor VitaeRitwick DasAuthor Vitae Rajan JhaAuthor Vitae |
| Affiliation: | a MIDC, Waluj, Aurangabad 431136, India b School of Physical Sciences, National Institute of Science Education and Research, Institute of Physics Campus, Bhubaneswar 751005, India c School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Samantapuri, Bhubaneswar 751013, India |
| Abstract: | A 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. |
| Keywords: | Surface plasmon resonance Sensor Photonic crystal |
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