チップ型近接場テラヘルツ分光イメージャーと量子伝導研究への応用

• 河野 行雄

  東京工業大学 科学技術創成研究院 未来産業技術研究所

書誌事項

タイトル別名

• Chip-Type Near-Field Terahertz Spectroscopic Imagers and Their Application to a Study of Quantum Transport
• チップガタ キンセツジョウ テラヘルツ ブンコウ イメージャー ト リョウシ デンドウ ケンキュウ エ ノ オウヨウ

抄録

Near-field terahertz (THz) spectroscopic imaging, which enables sub-wavelength analysis, is a powerful method for investigating nano- and micro-scale objects such as nanomaterials, polymers, cells, and biomolecules. However, near-field imaging in the THz region remains to be fully explored, compared to other frequency regions. This review explains our chip-type near-field THz spectroscopic imaging technology. We develop a collection-mode near-field THz imager, which is based on an evanescently coupled THz sensor with a two-dimensional electron gas. The utilization of frequency-selective THz detection makes it possible to obtain near-field THz images in separate frequency bands. With this technology, we perform cryogenic near-field THz-emission imaging without external THz sources, and visualize the spatial distribution of THz radiation associated with electron injection from a source electrode in a semiconductor device. Finally, a graphene-based THz detector with wide-band frequency-tunability is presented, in which the detection mechanism is based on Landau-level formation of Dirac fermions of the graphene. This device is promising as a wide-band near-field THz spectroscopic imager.

収録刊行物

• 表面科学

  表面科学 37 (12), 586-592, 2016

  公益社団法人 日本表面科学会

キーワード

• terahertz
• near-field imaging
• two-dimensional electron gas
• quantum transport
• graphene

詳細情報

• CRID: 1390001206459033600
• NII論文ID: 130005434913
• NII書誌ID: AN00334149
• DOI: 10.1380/jsssj.37.586
• ISSN: 18814743
• ISSN: 03885321
• NDL書誌ID: 027791045
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027791045
• Web Site: https://www.jstage.jst.go.jp/article/jsssj/37/12/37_586/_pdf
• 本文言語コード: ja
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