{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,19]],"date-time":"2026-03-19T14:41:20Z","timestamp":1773931280282,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2016,10,8]],"date-time":"2016-10-08T00:00:00Z","timestamp":1475884800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Natural Science Foundation of Liaoning Province, China","award":["2014020020"],"award-info":[{"award-number":["2014020020"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61574143"],"award-info":[{"award-number":["61574143"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51607029"],"award-info":[{"award-number":["51607029"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["N130404001"],"award-info":[{"award-number":["N130404001"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["N150403003"],"award-info":[{"award-number":["N150403003"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["N150404003"],"award-info":[{"award-number":["N150404003"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Project-sponsored by SRF for ROCS","award":["SEM(47-6)"],"award-info":[{"award-number":["SEM(47-6)"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A refractive index sensor based on dual-core photonic crystal fiber (PCF) with hexagonal lattice is proposed. The effects of geometrical parameters of the PCF on performances of the sensor are investigated by using the finite element method (FEM). Two fiber cores are separated by two air holes filled with the analyte whose refractive index is in the range of 1.33\u20131.41. Numerical simulation results show that the highest sensitivity can be up to 22,983 nm\/RIU(refractive index unit) when the analyte refractive index is 1.41. The lowest sensitivity can reach to 21,679 nm\/RIU when the analyte refractive index is 1.33. The sensor we proposed has significant advantages in the field of biomolecule detection as it provides a wide-range of detection with high sensitivity.<\/jats:p>","DOI":"10.3390\/s16101655","type":"journal-article","created":{"date-parts":[[2016,10,10]],"date-time":"2016-10-10T10:35:19Z","timestamp":1476095719000},"page":"1655","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["High Sensitivity Refractive Index Sensor Based on Dual-Core Photonic Crystal Fiber with Hexagonal Lattice"],"prefix":"10.3390","volume":"16","author":[{"given":"Haiyang","family":"Wang","sequence":"first","affiliation":[{"name":"College of Information Science and Engineering, Northeastern University, Shenyang 110819, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1914-5053","authenticated-orcid":false,"given":"Xin","family":"Yan","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Northeastern University, Shenyang 110819, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shuguang","family":"Li","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Northeastern University, Shenyang 110819, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guowen","family":"An","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Northeastern University, Shenyang 110819, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuenan","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Northeastern University, Shenyang 110819, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2016,10,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"961","DOI":"10.1364\/OL.22.000961","article-title":"Endlessly single-mode photonic crystal fiber","volume":"22","author":"Birks","year":"1997","journal-title":"Opt. Lett."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"236","DOI":"10.1364\/OPEX.13.000236","article-title":"Ultimate low loss of hollow-core photonic crystal fibres","volume":"13","author":"Roberts","year":"2005","journal-title":"Opt. Express"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"469","DOI":"10.1364\/OL.32.000469","article-title":"Highly birefringent elliptical-hole photonic crystal fiber with squeezed hexagonal lattice","volume":"32","author":"Yue","year":"2007","journal-title":"Opt. Lett."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"15481","DOI":"10.1364\/OE.17.015481","article-title":"A highly non-linear tellurite microstructure fiber with multi-ring holes for supercontinuum generation","volume":"17","author":"Liao","year":"2009","journal-title":"Opt. Express"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1919","DOI":"10.1364\/OE.17.001919","article-title":"Octave-spanning supercontinuum generated in SF6-glass PCF by a 1060 nm mode-locked fibre laser delivering 20 pJ per pulse","volume":"17","author":"Hundertmark","year":"2009","journal-title":"Opt. Express"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1109\/JLT.2006.888926","article-title":"10-GHz 0.5-ps Pulse Generation in 1000-nm Band in PCF for High-Speed Optical Communication","volume":"25","author":"Kurokawa","year":"2007","journal-title":"J. Lightwave Technol."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"956","DOI":"10.3390\/s130100956","article-title":"Surface plasmon resonance sensor based on polymer photonic crystal fibers with metal nanolayers","volume":"13","author":"Lu","year":"2013","journal-title":"Sensors"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"3006","DOI":"10.1116\/1.2101774","article-title":"Resonant grating filters as refractive index sensors for chemical and biological detections","volume":"23","author":"Wang","year":"2005","journal-title":"J. Vac. Sci. Technol. B"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"16522","DOI":"10.3390\/s121216522","article-title":"Recent progress in optical chemical sensors","volume":"12","author":"Qazi","year":"2012","journal-title":"Sensors"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"22490","DOI":"10.3390\/s150922490","article-title":"Carbon nanomaterials based electrochemical sensors\/biosensors for the sensitive detection of pharmaceutical and biological compounds","volume":"15","author":"Adhikari","year":"2015","journal-title":"Sensors"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"4723","DOI":"10.1016\/j.optcom.2009.09.030","article-title":"Optimization of photonic bandgap fiber long period grating refractive-index sensors","volume":"282","author":"Shi","year":"2009","journal-title":"Opt. Commun."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1550","DOI":"10.1016\/j.optcom.2011.11.104","article-title":"All-solid D-shaped photonic fiber sensor based on surface plasmon resonance","volume":"285","author":"Tian","year":"2012","journal-title":"Opt. Commun."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2103","DOI":"10.4028\/www.scientific.net\/AMR.753-755.2103","article-title":"Refractive Index Sensors Based Resonant Coupling in Solid-Core Photonic Band-Gap Fibers","volume":"753\u2013755","author":"Xiao","year":"2013","journal-title":"Adv. Mater. Res."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1696","DOI":"10.1080\/09500340.2014.951009","article-title":"Polarization splitter based on three-core photonic crystal fiber with rectangle lattice","volume":"61","author":"Chen","year":"2014","journal-title":"J. Mod. Opt."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Jiang, H., Wang, E., Xie, K., and Hu, Z. (2016). Dual-Core Photonic Crystal Fiber for Use in Fiber Filters. IEEE Photonics J., 8.","DOI":"10.1109\/JPHOT.2016.2539603"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"4091","DOI":"10.1364\/OE.19.004091","article-title":"Microstructured-core photonic-crystal fiber for ultra-sensitive refractive index sensing","volume":"19","author":"Sun","year":"2011","journal-title":"Opt. Express"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"5974","DOI":"10.1364\/OE.20.005974","article-title":"A multi-core holey fiber based plasmonic sensor with large detection range and high linearity","volume":"20","author":"Shuai","year":"2012","journal-title":"Opt. Express"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"322","DOI":"10.1364\/OL.34.000322","article-title":"Ultrasensitive photonic crystal fiber refractive index sensor","volume":"34","author":"Wu","year":"2009","journal-title":"Opt. Lett."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"856","DOI":"10.1364\/OL.35.000856","article-title":"Microstructured optical fiber refractive index sensor","volume":"35","author":"Town","year":"2010","journal-title":"Opt. Lett."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"8224","DOI":"10.1364\/OE.14.008224","article-title":"Photonic crystal fiber long-period gratings for biochemical sensing","volume":"14","author":"Rindorf","year":"2006","journal-title":"Opt. Express"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"5883","DOI":"10.1364\/OPEX.13.005883","article-title":"Selective detection of antibodies in microstructured polymer optical fibers","volume":"13","author":"Jensen","year":"2005","journal-title":"Opt. Express"},{"key":"ref_22","first-page":"881","article-title":"Full-Vector Analysis of Photonic Crystal Fibers Using the Finite Element Method (Special Issue on Optical Fibers and Devices)","volume":"85","author":"Miyashita","year":"2002","journal-title":"IEICE Trans. Electron."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"111102","DOI":"10.1063\/1.2982083","article-title":"Polarization-dependent coupling to plasmon modes on submicron gold wire in photonic crystal fiber","volume":"93","author":"Lee","year":"2008","journal-title":"Appl. Phys. Lett."},{"key":"ref_24","unstructured":"Agrawal, G.P. (1989). Nonlinear Fiber Optics, Academic Press."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"31833","DOI":"10.3390\/s151229891","article-title":"PCF Based Sensor with High Sensitivity, High Birefringence and Low Confinement Losses for Liquid Analyte Sensing Applications","volume":"15","author":"Ademgil","year":"2015","journal-title":"Sensors"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"2686","DOI":"10.1016\/j.optcom.2010.03.007","article-title":"Supermode analysis of multicore photonic crystal fibers","volume":"283","author":"Guan","year":"2010","journal-title":"Opt. Commun."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"25858","DOI":"10.1364\/OE.20.025858","article-title":"Coexistence of positive and negative refractive index sensitivity in the liquid-core photonic crystal fiber based plasmonic sensor","volume":"20","author":"Shuai","year":"2012","journal-title":"Opt. Express"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"18056","DOI":"10.1364\/OE.18.018056","article-title":"Femtosecond laser-assisted selective infiltration of microstructured optical fibers","volume":"18","author":"Wang","year":"2010","journal-title":"Opt. Express"},{"key":"ref_29","first-page":"943","article-title":"Laser micro-fabrication of concave, low-roughness features in silica","volume":"2","author":"Hunger","year":"2011","journal-title":"AIP Adv."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"4795","DOI":"10.1364\/OE.15.004795","article-title":"Coupling in dual-core photonic bandgap fibers: Theory and experiment","volume":"15","author":"Wang","year":"2007","journal-title":"Opt. Express"},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Huang, T. (2016). Highly Sensitive SPR Sensor Based on D-shaped Photonic Crystal Fiber Coated with Indium Tin Oxide at Near-Infrared Wavelength. Plasmonics, 1\u20136.","DOI":"10.1007\/s11468-016-0301-7"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1364\/OL.37.000067","article-title":"Refractive index sensor using microfiber-based Mach\u2014Zehnder interferometer","volume":"37","author":"Wo","year":"2012","journal-title":"Opt. Lett."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"131110","DOI":"10.1063\/1.3115029","article-title":"Tapered fiber Mach\u2013Zehnder interferometer for simultaneous measurement of refractive index and temperature","volume":"94","author":"Lu","year":"2009","journal-title":"Appl. Phys. Lett."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/10\/1655\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:32:33Z","timestamp":1760211153000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/10\/1655"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,10,8]]},"references-count":33,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2016,10]]}},"alternative-id":["s16101655"],"URL":"https:\/\/doi.org\/10.3390\/s16101655","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,10,8]]}}}