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イノウエ リョウタロウ
井上 亮太郎 所属 追手門学院大学 理工学部 電気電子工学科 職種 准教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2021 |
| 形態種別 | 論文 |
| 査読 | 査読あり |
| 標題 | A better understanding of terahertz emission from semiconductor surfaces with a phased-array effect |
| 執筆形態 | 共著・編著（代表編著を除く） |
| 掲載誌名 | AIP Advances |
| 掲載区分 | 国外 |
| 出版社・発行元 | AIP Publishing |
| 巻・号・頁 | 11(125021) |
| 著者・共著者 | A. Mannan,R. Inoue,F. Murakami,K. Serita,H. Murakami,M. Tonouchi |
| 概要 | We studied the phased-array effects in terahertz emission from semiconductor surfaces upon femtosecond laser illumination. A finite-difference time-domain simulation and experimental observation of the radiation patterns were utilized to examine the optical excitation at normal to the semiconductor surface and oblique angles of 30 & DEG; and 45 & DEG; with diameters of & SIM;10 and 275 mu m. The results revealed that there exists a clear phased-array effect for the defocusing conditions. The larger diameter induced a pronounced directivity of the emission owing to the constructive interference of multiple point sources obeying the law of linear superposition, whereas the radiation patterns at smaller diameters were explained as the dipole point source. This finding, in addition to previous studies, will provide a better understanding and contribute to applications of terahertz emission spectroscopy in the field of semiconductor research and development |
| DOI | 10.1063/5.0077054 |
| ISSN | /2158-3226 |