项目来源

日本学术振兴会基金(JSPS)

项目主持人

Dani Keshav

项目受资助机构

沖縄科学技術大学院大学

项目编号

22K18270

立项年度

2022

立项时间

未公开

项目级别

国家级

研究期限

未知 / 未知

受资助金额

25740000.00日元

学科

物性物理学およびその関連分野

学科代码

未公开

基金类别

挑戦的研究(開拓)

关键词

Extreme UV light source ; High order ; harmonic generation ; Moire pattern ; Extreme Ultraviolet ; Higher Harmonic ; Angle resolved ; photoemission ; electron microscopy

参与者

未公开

参与机构

沖縄科学技術大学院大学,フェムト秒分光法ユニット

项目标书摘要：The challenging nature of the experiment meant that this was a high-risk project.Nonetheless,we made extraordinary progress in developing nanoscale XUV-PEEM capabilities and in developing few-micron scale TR-ARPES techniques.Using these,we have been able to observe new phenomena in twisted hBN and the associated moire ferroelectric domains that form.The surprisingly result has required us to develop significant understanding and is currently being prepared for publication.In FY24,we succeeded in using the nanoscale XUV PEEM techniques to image ferroelectric domains in twisted hBN.We observed that nanoscale defects align along the domain nodes that provide a way to create structured arrays of defects in twisted hBN.Our work provides a new pathway to align color center defects in hBN for quantum technology applications.We are in the process of completing the final measurements,finalizing discussions with theory and sample fabrication collaborators,and preparing the manuscript.We anticipate completion of the research and submission of the manuscript in this fiscal year.Reason:The challenging nature of the experiment meant that this was a high-risk project.Nonetheless,we made extraordinary progress in developing nanoscale XUV-PEEM capabilities and in developing few-micron scale TR-ARPES techniques.Using these,we have been able to observe new phenomena in twisted hBN and the associated moire ferroelectric domains that form.The surprisingly result has required us to develop significant understanding and is currently being prepared for publication。Outline of Research at the Start:Creating new sources of light with non-standard wavelengths can provide powerful tools for science and technology.The XUV region of the electromagnetic spectrum creates new opportunities in photoemission spectroscopy like the powerful technique of Angle Resolved Photoemission Spectroscopy,and industrial fields like semiconductor fabrication.We propose to build a novel table-top source of XUV radiation that will provide significantly higher flux densities,to further push the boundaries of ARPES techniques and to study the newly emerging two-dimensional semiconductor heterostructures。