{"id":"https://openalex.org/A5037478355","orcid":"https://orcid.org/0009-0006-1907-268X","observed_orcids":["https://orcid.org/0009-0006-1907-268X"],"display_name":"Takahiko Kawahara","raw_author_names":["Kawahara, Takahiko","T. Kawahara","Takahiko Kawahara"],"full_name":"Takahiko Kawahara","works_count":25,"cited_by_count":78,"summary_stats":{"2yr_mean_citedness":2.875,"h_index":6,"i10_index":2},"ids":{"openalex":"https://openalex.org/A5037478355","orcid":"https://orcid.org/0009-0006-1907-268X","observed_orcids":["https://orcid.org/0009-0006-1907-268X"]},"affiliations":[{"institution":{"id":"https://openalex.org/I4210166210","ror":"https://ror.org/05rnkb382","display_name":"Sumitomo Electric Industries (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210166210"]},"years":[2026,2025,2019,2017,2016,2005]}],"last_known_institutions":[{"id":"https://openalex.org/I4210166210","ror":"https://ror.org/05rnkb382","display_name":"Sumitomo Electric Industries (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210166210"]}],"topics":[{"id":"https://openalex.org/T10099","display_name":"GaN-based semiconductor devices and materials","count":13,"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":9,"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/T11160","display_name":"Acoustic Wave Resonator Technologies","count":8,"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/T11637","display_name":"Advanced Semiconductor Detectors and Materials","count":8,"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":6,"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"}}],"topic_share":[{"id":"https://openalex.org/T12389","display_name":"Infrared Target Detection Methodologies","value":7.79e-05,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11160","display_name":"Acoustic Wave Resonator Technologies","value":5.67e-05,"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/T10099","display_name":"GaN-based semiconductor devices and materials","value":5.59e-05,"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":4.11e-05,"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/T11637","display_name":"Advanced Semiconductor Detectors and Materials","value":3.56e-05,"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":0.8494157791137695},{"id":"79794668","wikidata":"https://www.wikidata.org/wiki/Q1616270","display_name":"Heterojunction","score":0.8238000273704529},{"id":"49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","score":0.7817999720573425},{"id":"110738630","wikidata":"https://www.wikidata.org/wiki/Q1135540","display_name":"Epitaxy","score":0.738244891166687},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.40376198291778564}],"counts_by_year":[{"year":2005,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":1},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":1},{"year":2016,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":2017,"works_count":2,"oa_works_count":0,"cited_by_count":7},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":1},{"year":2019,"works_count":1,"oa_works_count":0,"cited_by_count":3},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":1},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":5},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":4},{"year":2025,"works_count":9,"oa_works_count":8,"cited_by_count":10},{"year":2026,"works_count":7,"oa_works_count":7,"cited_by_count":40}],"display_name_alternatives":["Kawahara, Takahiko","T. Kawahara","Takahiko Kawahara"],"block_key":"t kawahara","works_api_url":"https://api.openalex.org/works?filter=author.id:A5037478355","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5037478355","updated_date":"2026-11-10T14:30:39","created_date":"2016-06-24T00:00:00"}