Details

Autor(en) / Beteiligte

• Qian, Qinglu
• Liang, Youjian
• Liang, Yue
• Shao, Hongyan
• Zhang, Menglai
• Xiao, Ting
• Wang, Jicheng

Titel

Tunable Multiple-Step Plasmonic Bragg Reflectors with Graphene-Based Modulated Grating

Ist Teil von

• Sensors (Basel, Switzerland), 2016-12, Vol.16 (12), p.2039-2039

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We propose a novel plasmonic Bragg reflector (PBR) based on graphene with multiple-step silicon structure. The monolayer graphene bears locally variable optical properties by modulation of electric fields, and the periodical change of effective refractive index on graphene can be obtained by external bias voltage in the mid-infrared region. Through patterning the PBR units into multiple-step structures, we can decrease the insertion loss and suppress the rippling in transmission spectra. By introducing the defect into the multiple-step PBRs, the multiple resonance modes are formed inside the stopband by increasing the step number. This work may pave the ways for the further development of ultra-compact low-cost hyperspectral sensors in the mid-infrared region.