{"id":"https://openalex.org/W2917085259","doi":"https://doi.org/10.1364/ol.44.001230","title":"SiNx\u2013Si interlayer coupler using a gradient index metamaterial","display_name":"SiNx\u2013Si interlayer coupler using a gradient index metamaterial","publication_year":2019,"publication_date":"2019-02-26","ids":{"openalex":"https://openalex.org/W2917085259","doi":"https://doi.org/10.1364/ol.44.001230","mag":"2917085259","pmid":"https://pubmed.ncbi.nlm.nih.gov/30821755"},"language":"en","primary_location":{"id":"doi:10.1364/ol.44.001230","doi":"https://doi.org/10.1364/ol.44.001230","is_oa":false,"landing_page_url":"https://doi.org/10.1364/ol.44.001230","pdf_url":null,"source":{"id":"https://openalex.org/S134390580","display_name":"Optics Letters","issn_l":"0146-9592","issn":["0146-9592","1071-2763","1539-4794"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-2","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1"],"host_organization":"https://openalex.org/P4310315679","host_organization_name":"Optica Publishing Group","host_organization_lineage":["https://openalex.org/P4310315679"],"host_organization_lineage_names":["Optica Publishing Group"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Optics Letters","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5004503650","display_name":"Pengfei Xu","orcid":"https://orcid.org/0000-0001-5605-6394","observed_orcids":["https://orcid.org/0000-0001-5605-6394"]},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]},{"id":"https://openalex.org/I4391767867","display_name":"State Key Laboratory of Optoelectronic Materials and Technology","ror":"https://ror.org/010fszt18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Pengfei Xu","raw_affiliation_strings":["State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China","institution_ids":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100367489","display_name":"Yanfeng Zhang","orcid":"https://orcid.org/0000-0001-7545-7281","observed_orcids":["https://orcid.org/0000-0001-7545-7281"]},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]},{"id":"https://openalex.org/I4391767867","display_name":"State Key Laboratory of Optoelectronic Materials and Technology","ror":"https://ror.org/010fszt18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Yanfeng Zhang","raw_affiliation_strings":["State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China","institution_ids":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5020352405","display_name":"Shuailong Zhang","orcid":"https://orcid.org/0000-0003-1004-021X","observed_orcids":["https://orcid.org/0000-0003-1004-021X"]},"institutions":[{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]}],"countries":["CA"],"is_corresponding":true,"raw_author_name":"Shuailong Zhang","raw_affiliation_strings":["Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada"],"raw_orcid":"https://orcid.org/0000-0003-1004-021X","affiliations":[{"raw_affiliation_string":"Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada","institution_ids":["https://openalex.org/I185261750"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100459035","display_name":"Yujie Chen","orcid":"https://orcid.org/0000-0002-0778-419X","observed_orcids":["https://orcid.org/0000-0002-0778-419X"]},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]},{"id":"https://openalex.org/I4391767867","display_name":"State Key Laboratory of Optoelectronic Materials and Technology","ror":"https://ror.org/010fszt18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Yujie Chen","raw_affiliation_strings":["State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China"],"raw_orcid":"https://orcid.org/0000-0002-0778-419X","affiliations":[{"raw_affiliation_string":"State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China","institution_ids":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100784085","display_name":"Siyuan Yu","orcid":"https://orcid.org/0000-0002-2550-8201","observed_orcids":["https://orcid.org/0000-0002-2550-8201","https://orcid.org/0009-0001-5634-0763"]},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]},{"id":"https://openalex.org/I4391767867","display_name":"State Key Laboratory of Optoelectronic Materials and Technology","ror":"https://ror.org/010fszt18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Siyuan Yu","raw_affiliation_strings":["State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China","institution_ids":["https://openalex.org/I157773358","https://openalex.org/I4391767867"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5004503650","https://openalex.org/A5020352405","https://openalex.org/A5100367489","https://openalex.org/A5100459035","https://openalex.org/A5100784085"],"corresponding_institution_ids":["https://openalex.org/I157773358","https://openalex.org/I185261750","https://openalex.org/I4391767867"],"apc_list":null,"apc_paid":null,"fwci":0.6321,"has_fulltext":false,"cited_by_count":13,"citation_normalized_percentile":{"value":0.6389632,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":95},"biblio":{"volume":"44","issue":"5","first_page":"1230","last_page":"1230"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10299","display_name":"Photonic and Optical Devices","score":0.8690999746322632,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10299","display_name":"Photonic and Optical Devices","score":0.8690999746322632,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10245","display_name":"Metamaterials and Metasurfaces Applications","score":0.10329999774694443,"subfield":{"id":"https://openalex.org/subfields/2504","display_name":"Electronic, Optical and Magnetic Materials"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11527","display_name":"3D IC and TSV technologies","score":0.0031999999191612005,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/gradient-index-metamaterials","display_name":"gradient-index metamaterials","score":0.972000002861023},{"id":"https://openalex.org/keywords/refractive-index-matching","display_name":"refractive index matching","score":0.9760000109672546},{"id":"https://openalex.org/keywords/silicon-photonics","display_name":"silicon photonics","score":0.6129999756813049},{"id":"https://openalex.org/keywords/silicon-nitride","display_name":"silicon nitride","score":0.7509999871253967},{"id":"https://openalex.org/keywords/coupling-loss","display_name":"coupling loss","score":0.9129999876022339},{"id":"https://openalex.org/keywords/3d-photonic-integration","display_name":"3D photonic integration","score":0.8920000195503235},{"id":"https://openalex.org/keywords/insertion-loss","display_name":"insertion loss","score":0.5400000214576721},{"id":"https://openalex.org/keywords/bandwidth","display_name":"bandwidth","score":0.531000018119812}],"concepts":[{"id":"https://openalex.org/C42067758","wikidata":"https://www.wikidata.org/wiki/Q174102","display_name":"Refractive index","level":2,"score":0.813471794128418},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.7521936893463135},{"id":"https://openalex.org/C110367647","wikidata":"https://www.wikidata.org/wiki/Q497166","display_name":"Metamaterial","level":2,"score":0.7209827899932861},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.6723892688751221},{"id":"https://openalex.org/C90327742","wikidata":"https://www.wikidata.org/wiki/Q947396","display_name":"Insertion loss","level":2,"score":0.5222309827804565},{"id":"https://openalex.org/C169822122","wikidata":"https://www.wikidata.org/wiki/Q230187","display_name":"Crosstalk","level":2,"score":0.4971604645252228},{"id":"https://openalex.org/C202988678","wikidata":"https://www.wikidata.org/wiki/Q1417986","display_name":"Power dividers and directional couplers","level":2,"score":0.4459798038005829},{"id":"https://openalex.org/C2776257435","wikidata":"https://www.wikidata.org/wiki/Q1576430","display_name":"Bandwidth (computing)","level":2,"score":0.43670180439949036},{"id":"https://openalex.org/C49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","level":1,"score":0.43585652112960815},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.19582632184028625},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.11250966787338257},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.1364/ol.44.001230","doi":"https://doi.org/10.1364/ol.44.001230","is_oa":false,"landing_page_url":"https://doi.org/10.1364/ol.44.001230","pdf_url":null,"source":{"id":"https://openalex.org/S134390580","display_name":"Optics Letters","issn_l":"0146-9592","issn":["0146-9592","1071-2763","1539-4794"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-2","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1"],"host_organization":"https://openalex.org/P4310315679","host_organization_name":"Optica Publishing Group","host_organization_lineage":["https://openalex.org/P4310315679"],"host_organization_lineage_names":["Optica Publishing Group"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Optics Letters","raw_type":"journal-article"},{"id":"pmid:30821755","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/30821755","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Optics letters","raw_type":"Journal Article"},{"id":"pmh:oai:research-information.bris.ac.uk:openaire_cris_publications/e4555feb-0981-4ced-a4dd-2c647ac427bc","doi":null,"is_oa":false,"landing_page_url":"https://research-information.bris.ac.uk/en/publications/e4555feb-0981-4ced-a4dd-2c647ac427bc","pdf_url":null,"source":{"id":"https://openalex.org/S4306400895","display_name":"Bristol Research (University of Bristol)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I36234482","host_organization_name":"University of Bristol","host_organization_lineage":["https://openalex.org/I36234482"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Xu, P, Zhang, Y, Zhang, S, Chen, Y & Yu, S 2019, 'SiN x \u2013Si interlayer coupler using a gradient index metamaterial', Optics Letters, vol. 44, no. 5, pp. 1230-1233. https://doi.org/10.1364/OL.44.001230","raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:research-information.bris.ac.uk:publications/e4555feb-0981-4ced-a4dd-2c647ac427bc","doi":null,"is_oa":false,"landing_page_url":"https://research-information.bris.ac.uk/en/publications/e4555feb-0981-4ced-a4dd-2c647ac427bc","pdf_url":null,"source":{"id":"https://openalex.org/S7407055359","display_name":"Explore Bristol Research","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Xu, P, Zhang, Y, Zhang, S, Chen, Y & Yu, S 2019, 'SiN x \u2013Si interlayer coupler using a gradient index metamaterial', Optics Letters, vol. 44, no. 5, pp. 1230-1233. https://doi.org/10.1364/OL.44.001230","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G1323915570","display_name":null,"funder_award_id":"61490715","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G2074490433","display_name":null,"funder_award_id":"(U1701661)","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G432996593","display_name":null,"funder_award_id":"11774437","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G7511663382","display_name":null,"funder_award_id":"2016YFB0402503","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320335777","display_name":"National Key Research and Development Program of China","ror":null}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":39,"referenced_works":["https://openalex.org/W1483290839","https://openalex.org/W1826366340","https://openalex.org/W1844715769","https://openalex.org/W1967305048","https://openalex.org/W1975912905","https://openalex.org/W1992300690","https://openalex.org/W2009493379","https://openalex.org/W2011010549","https://openalex.org/W2020747132","https://openalex.org/W2042315282","https://openalex.org/W2070161878","https://openalex.org/W2079519839","https://openalex.org/W2083260984","https://openalex.org/W2087679179","https://openalex.org/W2088619368","https://openalex.org/W2091249825","https://openalex.org/W2111136900","https://openalex.org/W2153696634","https://openalex.org/W2165260925","https://openalex.org/W2172272050","https://openalex.org/W2201524820","https://openalex.org/W2216365894","https://openalex.org/W2273038416","https://openalex.org/W2415507441","https://openalex.org/W2468172470","https://openalex.org/W2529995943","https://openalex.org/W2542690528","https://openalex.org/W2555932942","https://openalex.org/W2560120165","https://openalex.org/W2565099952","https://openalex.org/W2609640475","https://openalex.org/W2611588382","https://openalex.org/W2673112438","https://openalex.org/W2736354921","https://openalex.org/W2744550017","https://openalex.org/W2744735144","https://openalex.org/W2748034258","https://openalex.org/W2770966813","https://openalex.org/W3101350886"],"related_works":["https://openalex.org/W2333063180","https://openalex.org/W1975912905","https://openalex.org/W4393217163","https://openalex.org/W4414172467","https://openalex.org/W7161801545","https://openalex.org/W4398220004","https://openalex.org/W4379519468","https://openalex.org/W3205786549","https://openalex.org/W4378802514","https://openalex.org/W4392682063"],"abstract_inverted_index":{"In":[0,40],"this":[1],"work,":[2],"we":[3,60],"demonstrate":[4,94],"a":[5,42,62,99],"metamaterial":[6],"(MM)-based":[7],"SiN":[8,37,44,65,102],"x":[9,38,45,66,103],"\u2013Si":[10,67,104],"interlayer":[11,46,57,68,89,105],"coupler.":[12],"A":[13],"gradient":[14],"index":[15,23,32],"(GRIN)":[16],"MM":[17],"was":[18,48],"employed":[19],"to":[20,50],"achieve":[21],"refractive":[22,31],"matching,":[24],"balancing":[25],"the":[26,30,53,71,80,95],"large":[27],"difference":[28],"in":[29,107],"between":[33],"Si":[34],"(\u223c3.42)":[35],"and":[36,56,86],"(\u223c2).":[39],"addition,":[41],"two-layer":[43],"coupler":[47,69,106],"proposed":[49],"further":[51],"minimize":[52],"coupling":[54],"loss":[55,75],"crosstalk.":[58,90],"Finally,":[59],"demonstrated":[61],"three-dimensional":[63],"(3D)":[64],"with":[70,79],"\u22120.6":[72],"dB":[73,88],"insertion":[74],"per":[76],"layer":[77],"propagation,":[78],"40":[81],"nm":[82],"1-dB-bandwidth":[83],"(1530\u20131570":[84],"nm)":[85],"<\u221245":[87],"These":[91],"promising":[92],"results":[93],"great":[96],"potential":[97],"of":[98],"GRIN":[100],"MM-based":[101],"3D":[108],"photonic":[109],"integration.":[110]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1}],"updated_date":"2026-11-06T12:05:46.655746","created_date":"2019-03-02T00:00:00"}