| 講演名 | 2021-11-11 Theoretical and Experimental Analysis of Terahertz Scattering from Rough Surfaces Suyun Wang(NICT), Takayoshi Yamada(NICT), Kun-Shan Chen(Guilin University of Technology), Yasuko Kasai(NICT), |
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| 抄録(和) | In this paper, we explore the terahertz scattering from statistically-specified randomly rough surfaces at 480 GHz. These contain eight reference surfaces made from Durable Resin V2 by 3D printing with the prescribed power spectral density and height probability density function, along with the RMS heights and correlation lengths. The dielectric constant of the material was measured by terahertz time-domain spectroscopy (THz-TDS). To better understand the physical mechanism of the terahertz scattering from random rough surfaces, the effects of root-mean-square (RMS) height, correlation length, dielectric constant, and probing frequency, polarization, and incidence angle were investigated. We applied the well-known advanced integral equation model (AIEM) to calculate HH- and VV-polarized scattering coefficients, both coherent and incoherent. Numerical results indicate that the diffuse scattering is enhanced when the RMS height increases, particularly in backscattering. As the correlation length varies, the scattering patterns illustrate a strong azimuthal dependence. We conducted measurements to measure the given rough surfaces by Picometrix T-Ray 4000. The measured results show that, at terahertz region, the reflectivity decreases as the surface roughness increases. Hence it is practically feasible to remote sensing of the rough surface by terahertz scattering. |
| 抄録(英) | In this paper, we explore the terahertz scattering from statistically-specified randomly rough surfaces at 480 GHz. These contain eight reference surfaces made from Durable Resin V2 by 3D printing with the prescribed power spectral density and height probability density function, along with the RMS heights and correlation lengths. The dielectric constant of the material was measured by terahertz time-domain spectroscopy (THz-TDS). To better understand the physical mechanism of the terahertz scattering from random rough surfaces, the effects of root-mean-square (RMS) height, correlation length, dielectric constant, and probing frequency, polarization, and incidence angle were investigated. We applied the well-known advanced integral equation model (AIEM) to calculate HH- and VV-polarized scattering coefficients, both coherent and incoherent. Numerical results indicate that the diffuse scattering is enhanced when the RMS height increases, particularly in backscattering. As the correlation length varies, the scattering patterns illustrate a strong azimuthal dependence. We conducted measurements to measure the given rough surfaces by Picometrix T-Ray 4000. The measured results show that, at terahertz region, the reflectivity decreases as the surface roughness increases. Hence it is practically feasible to remote sensing of the rough surface by terahertz scattering. |
| キーワード(和) | Terahertz Scattering / Rough Surface / THz-TDS / T-Ray |
| キーワード(英) | Terahertz Scattering / Rough Surface / THz-TDS / T-Ray |
| 資料番号 | SANE2021-38 |
| 発行日 | 2021-11-04 (SANE) |
| 研究会情報 | |
| 研究会 | SANE |
|---|---|
| 開催期間 | 2021/11/11(から2日開催) |
| 開催地（和） | オンライン開催 |
| 開催地（英） | Online |
| テーマ（和） | ICSANE2021/地下電磁計測ワークショップ |
| テーマ（英） | ICSANE2021/Workshop on subsurface electromagnetic measurement |
| 委員長氏名（和） | 森山 敏文(長崎大) |
| 委員長氏名（英） | Toshifumi Moriyama(Nagasaki Univ.) |
| 副委員長氏名（和） | 田中 真(東海大) / 網嶋 武(三菱電機) |
| 副委員長氏名（英） | Makoto Tanaka(Tokai Univ.) / Takeshi Amishima(Mitsubishi Electric) |
| 幹事氏名（和） | 夏秋 嶺(東大) / 二ッ森 俊一(電子航法研) |
| 幹事氏名（英） | Ryo Natsuaki(Univ. of Tokyo) / Shunichi Futatsumori(ENRI) |
| 幹事補佐氏名（和） | 北村 尭之(三菱電機) |
| 幹事補佐氏名（英） | Takayuki Kitamura(Mitsubishi Electric) |
| 講演論文情報詳細 | |
| 申込み研究会 | Technical Committee on Space, Aeronautical and Navigational Electronics |
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| 本文の言語 | ENG |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | Theoretical and Experimental Analysis of Terahertz Scattering from Rough Surfaces |
| サブタイトル（和） | |
| キーワード(1)（和/英） | Terahertz Scattering / Terahertz Scattering |
| キーワード(2)（和/英） | Rough Surface / Rough Surface |
| キーワード(3)（和/英） | THz-TDS / THz-TDS |
| キーワード(4)（和/英） | T-Ray / T-Ray |
| 第 1 著者 氏名（和/英） | Suyun Wang / Suyun Wang |
| 第 1 著者 所属（和/英） | National Institute of Information and Communications Technology(略称：NICT) National Institute of Information and Communications Technology(略称：NICT) |
| 第 2 著者 氏名（和/英） | Takayoshi Yamada / Takayoshi Yamada |
| 第 2 著者 所属（和/英） | National Institute of Information and Communications Technology(略称：NICT) National Institute of Information and Communications Technology(略称：NICT) |
| 第 3 著者 氏名（和/英） | Kun-Shan Chen / Kun-Shan Chen |
| 第 3 著者 所属（和/英） | Guilin University of Technology(略称：Guilin University of Technology) Guilin University of Technology(略称：Guilin University of Technology) |
| 第 4 著者 氏名（和/英） | Yasuko Kasai / Yasuko Kasai |
| 第 4 著者 所属（和/英） | National Institute of Information and Communications Technology(略称：NICT) National Institute of Information and Communications Technology(略称：NICT) |
| 発表年月日 | 2021-11-11 |
| 資料番号 | SANE2021-38 |
| 巻番号（vol） | vol.121 |
| 号番号（no） | SANE-236 |
| ページ範囲 | pp.36-39(SANE), |
| ページ数 | 4 |
| 発行日 | 2021-11-04 (SANE) |