2015年4月
Conditions for stronger field enhancement of semiconductor bowtie nanoantennas
OPTICS LETTERS
- ,
- 巻
- 40
- 号
- 8
- 開始ページ
- 1695
- 終了ページ
- 1698
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1364/OL.40.001695
- 出版者・発行元
- OPTICAL SOC AMER
A semiconductor bowtie nanoantenna acts as a high-quality cavity because a strongly enhanced field with a narrow spectral width appears at a nanogap region owing to exciton resonance. We theoretically investigate suitable antenna structures to obtain a strong field enhancement, and the following conditions are found: (i) the antenna structure is long in the direction of light polarization, and (ii) the tip structure near the nanogap is blunt. Condition (ii) is opposite to that for a metallic bowtie nanoantenna because the exciton wave function is distributed to avoid a narrow area near the sharp tip. These conditions are expected to be guidelines for designing efficient semiconductor nanoantennas for various applications. (C) 2015 Optical Society of America
- リンク情報
- ID情報
-
- DOI : 10.1364/OL.40.001695
- ISSN : 0146-9592
- eISSN : 1539-4794
- Web of Science ID : WOS:000353920100020