@article{72ac8f99b5674c04aba2cc1f3601c10d,
title = "Determination of the element-specific complex permittivity using a soft x-ray phase modulator",
abstract = "We report on directly determining the complex permittivity tensor using a method combining a developed light source from a segmented cross undulator of synchrotron radiation and the magneto-optical Kerr effect. The empirical permittivity, which carries the electronic and magnetic information of a material, has element specificity and has perfect confirmation using the quantum-mechanical calculation for itinerant electrons systems. These results help in understanding the interaction of light and matter, and they provide an interesting approach to seek the best materials as optical elements, for example, in extended-ultraviolet lithographic technologies or in state-of-the-art laser technologies.",
author = "Y. Kubota and Y. Hirata and J. Miyawaki and S. Yamamoto and H. Akai and R. Hobara and Sh Yamamoto and K. Yamamoto and T. Someya and K. Takubo and Y. Yokoyama and M. Araki and M. Taguchi and Y. Harada and H. Wadati and M. Tsunoda and R. Kinjo and A. Kagamihata and T. Seike and M. Takeuchi and T. Tanaka and S. Shin and I. Matsuda",
note = "Funding Information: This research was partially supported by the Ministry of Education, Culture, Sports, Science, and Technology of Japan (X-ray Free Electron Laser Priority Strategy Program and Photon and Quantum Basic Research Coordinated Development Program), the Research Foundation for Opto-Science and Technology, the Hyogo Science and Technology Association, and the Japan Society for the Promotion of Science under a Grant-in-Aid for Scientific Research (C) (Grant No. 26400328). The experiment was performed using the facilities of the Synchrotron Radiation Research Organization, The University of Tokyo (Proposals No. 2014A7401, No. 2014B7401, No. 2014B7473, No. 2015A7401, No. 2015B7401, No. 2016A7403, No. 2016A7504, and No. 2016B7403). We thank Masato Kotsugi for valuable discussion and Hiroshi Narita for building the experimental equipment. Yoshinobu Takahashi is acknowledged for his support during the experiment. M.T. acknowledges Hiroshi Daimon for supporting his research with valuable discussion. Y.K. acknowledges support from the ALPS programs of the University of Tokyo. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = dec,
day = "11",
doi = "10.1103/PhysRevB.96.214417",
language = "English",
volume = "96",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "21",
}