Takashima, Yuusuke Tokushima University|Japan Society for the Promotion of Science Tokushima University Educator and Researcher Directory
Tanabe, Masato Tokushima University
Haraguchi, Masanobu Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Naoi, Yoshiki Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
A polarizer with high extinction (ER) ratio was developed in the ultraviolet wavelength region using a germanium subwavelength grating (Ge-SWG). By utilizing an eigenmode with the Ge-SWG, a high ER was numerically predicted to exist without requiring a high structural aspect ratio. After using lithography to fabricate the proposed Ge-SWG, an experimental high ER value of 17.4 dB was reached at a wavelength of 360 nm in the developed Ge-SWG, which had a very low structural aspect ratio of 1.67.
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apop_56_29_8224.pdf 2.23 MB
Science and Technology