{"id":"https://openalex.org/A5071780041","orcid":"https://orcid.org/0000-0002-7281-6151","observed_orcids":["https://orcid.org/0000-0002-7281-6151"],"display_name":"Hajime Fujikura","raw_author_names":["Fujikura Hajime","Fujikura, Hajime","H Fujikura","H. Fujikura","Hajime FUJIKURA","Hajime Fujikura","Hajime Fujikura Hajime Fujikura"],"full_name":"Hajime Fujikura Hajime Fujikura","works_count":117,"cited_by_count":1116,"summary_stats":{"2yr_mean_citedness":5.866666666666666,"h_index":20,"i10_index":35},"ids":{"openalex":"https://openalex.org/A5071780041","orcid":"https://orcid.org/0000-0002-7281-6151","observed_orcids":["https://orcid.org/0000-0002-7281-6151"]},"affiliations":[{"institution":{"id":"https://openalex.org/I139235422","ror":"https://ror.org/03nyxmy82","display_name":"Sumitomo Chemical (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I139235422"]},"years":[2026,2025,2024,2023]},{"institution":{"id":"https://openalex.org/I205349734","ror":"https://ror.org/02e16g702","display_name":"Hokkaido University","country_code":"JP","type":"education","lineage":["https://openalex.org/I205349734"]},"years":[2005,2003,2002,2000,1999,1998,1997,1996,1995,1994,1993,1992]},{"institution":{"id":"https://openalex.org/I22299242","ror":"https://ror.org/02kpeqv85","display_name":"Kyoto University","country_code":"JP","type":"education","lineage":["https://openalex.org/I22299242"]},"years":[2019]},{"institution":{"id":"https://openalex.org/I4405265851","ror":"https://ror.org/05wge4067","display_name":"Sciocs Company Limited (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405265851"]},"years":[2022,2021,2020,2019,2018,2017]},{"institution":{"id":"https://openalex.org/I4405273840","ror":"https://ror.org/00jpdke94","display_name":"Proterial, Ltd. (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405273840"]},"years":[2015,2003]},{"institution":{"id":"https://openalex.org/I4405274984","ror":"https://ror.org/02r38gs37","display_name":"Hitachi Cable, Ltd. (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405274984"]},"years":[2011,2003]},{"institution":{"id":"https://openalex.org/I4405286035","ror":"https://ror.org/00zwctm44","display_name":"Research Center for Integrated Quantum Electronics, Hokkaido University","country_code":"JP","type":"facility","lineage":["https://openalex.org/I205349734","https://openalex.org/I4405286035"]},"years":[2000]},{"institution":{"id":"https://openalex.org/I4405286711","ror":"https://ror.org/02wb1d827","display_name":"Institute of Materials and Systems for Sustainability, Nagoya University","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4405286711","https://openalex.org/I60134161"]},"years":[2019]},{"institution":{"id":"https://openalex.org/I60134161","ror":"https://ror.org/04chrp450","display_name":"Nagoya University","country_code":"JP","type":"education","lineage":["https://openalex.org/I60134161"]},"years":[2019]},{"institution":{"id":"https://openalex.org/I65143321","ror":"https://ror.org/02exqgm79","display_name":"Hitachi (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I65143321"]},"years":[2015,2011,2003]}],"last_known_institutions":[{"id":"https://openalex.org/I139235422","ror":"https://ror.org/03nyxmy82","display_name":"Sumitomo Chemical (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I139235422"]}],"topics":[{"id":"https://openalex.org/T10022","display_name":"Semiconductor Quantum Structures and Devices","count":55,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10099","display_name":"GaN-based semiconductor devices and materials","count":52,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10361","display_name":"Silicon Carbide Semiconductor Technologies","count":45,"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/T11853","display_name":"Semiconductor materials and interfaces","count":30,"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/T10558","display_name":"Advancements in Semiconductor Devices and Circuit Design","count":24,"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"}}],"topic_share":[{"id":"https://openalex.org/T12529","display_name":"Ga2O3 and related materials","value":0.0004678,"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/T11272","display_name":"Nanowire Synthesis and Applications","value":0.0002241,"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/T10099","display_name":"GaN-based semiconductor devices and materials","value":0.0002235,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10361","display_name":"Silicon Carbide Semiconductor Technologies","value":0.0002057,"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/T12309","display_name":"solar cell performance optimization","value":0.0001944,"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"}}],"x_concepts":[{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.9371897578239441},{"id":"49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","score":0.7449896335601807},{"id":"2779227376","wikidata":"https://www.wikidata.org/wiki/Q6505497","display_name":"Layer (electronics)","score":0.6627002954483032},{"id":"171250308","wikidata":"https://www.wikidata.org/wiki/Q11468","display_name":"Nanotechnology","score":0.5259732604026794},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.38419869542121887}],"counts_by_year":[{"year":1992,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":1993,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1996,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":11,"oa_works_count":3,"cited_by_count":0},{"year":1998,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":12,"oa_works_count":3,"cited_by_count":0},{"year":2000,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":2001,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2002,"works_count":8,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2004,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2005,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":11},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":6},{"year":2015,"works_count":1,"oa_works_count":0,"cited_by_count":5},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":6},{"year":2017,"works_count":10,"oa_works_count":2,"cited_by_count":14},{"year":2018,"works_count":5,"oa_works_count":1,"cited_by_count":23},{"year":2019,"works_count":7,"oa_works_count":0,"cited_by_count":48},{"year":2020,"works_count":4,"oa_works_count":0,"cited_by_count":62},{"year":2021,"works_count":5,"oa_works_count":0,"cited_by_count":81},{"year":2022,"works_count":1,"oa_works_count":1,"cited_by_count":65},{"year":2023,"works_count":2,"oa_works_count":2,"cited_by_count":51},{"year":2024,"works_count":9,"oa_works_count":6,"cited_by_count":73},{"year":2025,"works_count":4,"oa_works_count":2,"cited_by_count":92},{"year":2026,"works_count":2,"oa_works_count":1,"cited_by_count":102}],"display_name_alternatives":["Fujikura Hajime","Fujikura, Hajime","H Fujikura","H. Fujikura","Hajime FUJIKURA","Hajime Fujikura","Hajime Fujikura Hajime Fujikura"],"block_key":"h fujikura","works_api_url":"https://api.openalex.org/works?filter=author.id:A5071780041","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5071780041","updated_date":"2026-11-12T13:17:38","created_date":"2016-06-24T00:00:00"}