{"id":"https://openalex.org/A5107844584","orcid":"https://orcid.org/0000-0002-6347-433X","observed_orcids":["https://orcid.org/0000-0002-6347-433X"],"display_name":"K. Hayasaka","raw_author_names":["Hayasaka, K.","K Hayasaka","K. Hayasaka"],"full_name":"Hayasaka, K.","works_count":82,"cited_by_count":973,"summary_stats":{"2yr_mean_citedness":5.25,"h_index":16,"i10_index":23},"ids":{"openalex":"https://openalex.org/A5107844584","orcid":"https://orcid.org/0000-0002-6347-433X","observed_orcids":["https://orcid.org/0000-0002-6347-433X"]},"affiliations":[{"institution":{"id":"https://openalex.org/I110594554","ror":"https://ror.org/01cc3fy72","display_name":"Ikerbasque","country_code":"ES","type":"other","lineage":["https://openalex.org/I110594554"]},"years":[2020]},{"institution":{"id":"https://openalex.org/I138728355","ror":"https://ror.org/01g5y5k24","display_name":"High Energy Accelerator Research Organization","country_code":"JP","type":"facility","lineage":["https://openalex.org/I1319490839","https://openalex.org/I138728355"]},"years":[2026,2024,2023]},{"institution":{"id":"https://openalex.org/I4210086780","ror":"https://ror.org/00097mb19","display_name":"Japan Science and Technology Agency","country_code":"JP","type":"government","lineage":["https://openalex.org/I1319490839","https://openalex.org/I4210086780"]},"years":[2006]},{"institution":{"id":"https://openalex.org/I4575257","ror":"https://ror.org/046865y68","display_name":"Hanyang University","country_code":"KR","type":"education","lineage":["https://openalex.org/I4575257"]},"years":[2026]},{"institution":{"id":"https://openalex.org/I71395657","ror":"https://ror.org/04ww21r56","display_name":"Niigata University","country_code":"JP","type":"education","lineage":["https://openalex.org/I71395657"]},"years":[2022]},{"institution":{"id":"https://openalex.org/I90023481","ror":"https://ror.org/016bgq349","display_name":"National Institute of Information and Communications Technology","country_code":"JP","type":"facility","lineage":["https://openalex.org/I90023481"]},"years":[2021,2017,2012,2011,2010,2009,2008,2006,2005,2004]},{"institution":{"id":"https://openalex.org/I98285908","ror":"https://ror.org/035t8zc32","display_name":"The University of Osaka","country_code":"JP","type":"education","lineage":["https://openalex.org/I98285908"]},"years":[2021,2003]}],"last_known_institutions":[{"id":"https://openalex.org/I138728355","ror":"https://ror.org/01g5y5k24","display_name":"High Energy Accelerator Research Organization","country_code":"JP","type":"facility","lineage":["https://openalex.org/I1319490839","https://openalex.org/I138728355"]},{"id":"https://openalex.org/I4575257","ror":"https://ror.org/046865y68","display_name":"Hanyang University","country_code":"KR","type":"education","lineage":["https://openalex.org/I4575257"]}],"topics":[{"id":"https://openalex.org/T10048","display_name":"Particle physics theoretical and experimental studies","count":27,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy 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/T10020","display_name":"Quantum Information and Cryptography","count":26,"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/T10224","display_name":"Quantum Chromodynamics and Particle Interactions","count":25,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy 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/T12004","display_name":"Advanced Frequency and Time Standards","count":25,"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/T11044","display_name":"Particle Detector Development and Performance","count":19,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T12004","display_name":"Advanced Frequency and Time Standards","value":0.0003826,"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/T10425","display_name":"Cold Atom Physics and Bose-Einstein Condensates","value":0.0001249,"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/T11414","display_name":"Quantum optics and atomic interactions","value":0.0001,"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/T10020","display_name":"Quantum Information and Cryptography","value":7.78e-05,"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/T11127","display_name":"Solid State Laser Technologies","value":4.79e-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":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.9679145812988281},{"id":"520434653","wikidata":"https://www.wikidata.org/wiki/Q38867","display_name":"Laser","score":0.8297317028045654},{"id":"120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","score":0.7770339846611023},{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.7749772667884827},{"id":"62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","score":0.4876207411289215}],"counts_by_year":[{"year":1991,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1992,"works_count":1,"oa_works_count":0,"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":1,"oa_works_count":0,"cited_by_count":0},{"year":1996,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1997,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2002,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":6,"oa_works_count":2,"cited_by_count":0},{"year":2004,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2005,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":7,"oa_works_count":1,"cited_by_count":0},{"year":2008,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2010,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":3,"oa_works_count":0,"cited_by_count":29},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":28},{"year":2014,"works_count":1,"oa_works_count":0,"cited_by_count":19},{"year":2015,"works_count":1,"oa_works_count":0,"cited_by_count":20},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":29},{"year":2017,"works_count":2,"oa_works_count":0,"cited_by_count":22},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":24},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":17},{"year":2020,"works_count":2,"oa_works_count":2,"cited_by_count":13},{"year":2021,"works_count":6,"oa_works_count":5,"cited_by_count":13},{"year":2022,"works_count":7,"oa_works_count":7,"cited_by_count":25},{"year":2023,"works_count":2,"oa_works_count":2,"cited_by_count":43},{"year":2024,"works_count":2,"oa_works_count":2,"cited_by_count":52},{"year":2025,"works_count":1,"oa_works_count":0,"cited_by_count":60},{"year":2026,"works_count":5,"oa_works_count":5,"cited_by_count":60}],"display_name_alternatives":["Hayasaka, K.","K Hayasaka","K. Hayasaka"],"block_key":"k hayasaka","works_api_url":"https://api.openalex.org/works?filter=author.id:A5107844584","updated_date":"2026-11-08T12:57:04","created_date":"2016-06-24T00:00:00"}