Superabsorbers: Efficient Mid‐Infrared Light Confinement within Sub‐5‐nm Gaps for Extreme Field Enhancement (Advanced Optical Materials 17/2017). Issue 17 (1st September 2017)

• Record Type: Journal Article
• Authors: Ji, Dengxin; Cheney, Alec; Zhang, Nan; Song, Haomin; Gao, Jun; Zeng, Xie; Hu, Haifeng; Jiang, Suhua; Yu, Zongfu; Gan, Qiaoqiang
• Is Part Of: Advanced optical materials. Volume 5:Issue 17(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-09-01
• Subjects: light confinement -- nanofabrication -- SEIRA -- sub‐5 nm gap, superabsorbers; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201770083
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract : Strong localized fields can significantly enhance the light–matter interaction at nanoscales. In article number 1700223, Qiaoqiang Gan and co‐workers experimentally squeeze 81% of the incident mid‐infrared radiation into a metamaterial absorber with sub‐5‐nm gaps fabricated using atomic layer deposition processes. The strong localized field supported in these nanogaps results in enhancement factors up to around 10 6 –10 7 for surface‐enhanced infrared absorption spectroscopy.