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The resonant cavity filled with PDMS polymer is side-coupled to the MIM bus waveguide. The sensitivity of the proposed device is\u2009~\u2009\u2212\u20090.44\u00a0nm\/\u00b0C which can be further enhanced to \u2212\u20090.63\u00a0nm\/\u00b0C by embedding a period array of metallic nanoblocks in the center of the cavity. We comprehend the existence of numerous highly attractive and sensitive plasmonic sensor designs, yet a notable gap exists in the exploration of light coupling mechanisms to these nanoscale waveguides. Consequently, we introduced an attractive approach: orthogonal mode couplers designed for plasmonic chips, which leverage MIM waveguide-based sensors. The optimized transmission of the hybrid system including silicon couplers and MIM waveguide is in the range of \u2212\u20091.73\u00a0dB to \u2212\u20092.93\u00a0dB for a broad wavelength range of 1450\u20131650\u00a0nm. The skillful integration of these couplers not only distinguishes our plasmonic sensor but also positions it as a highly promising solution for an extensive array of sensing applications.<\/jats:p>","DOI":"10.1038\/s41598-024-54244-0","type":"journal-article","created":{"date-parts":[[2024,2,12]],"date-time":"2024-02-12T00:02:15Z","timestamp":1707696135000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":50,"title":["Orthogonal mode couplers for plasmonic chip based on metal\u2013insulator\u2013metal waveguide for temperature sensing application"],"prefix":"10.1038","volume":"14","author":[{"given":"Muhammad Ali","family":"Butt","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryszard","family":"Piramidowicz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,2,12]]},"reference":[{"key":"54244_CR1","doi-asserted-by":"publisher","first-page":"1502","DOI":"10.3390\/ma12091502","volume":"12","author":"G Barbillon","year":"2019","unstructured":"Barbillon, G. 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