Real-time and non-destructive hydrocarbon gas sensing using mid-infrared integrated photonic circuits. Issue 13 (19th February 2020)

• Record Type: Journal Article
• Authors: Jin, Tiening; Zhou, Junchao; Lin, Pao Tai
• Is Part Of: RSC advances. Volume 10:Issue 13(2020)
• Page Start: 7452
• Page End: 7459
• Publication Date: 2020-02-19
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra10058j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A chip-scale mid-infrared (mid-IR) sensor was developed for hydrocarbon gas detection. Abstract : A chip-scale mid-infrared (mid-IR) sensor was developed for hydrocarbon gas detection. The sensor consisted of amorphous Si (a-Si) optical ridge waveguides that were fabricated by complementary metal–oxide–semiconductor (CMOS) processes. The waveguide exhibited a sharp fundamental mode through λ = 2.70 to 3.50 μm. Its sensing performance was characterized by measuring methane and acetylene. From the spectral mode attenuation, the characteristic C–H absorption bands associated with methane and acetylene were found at λ = 3.29–3.33 μm and λ = 3.00–3.06 μm, respectively. In addition, real-time methane and acetylene concentration monitoring was demonstrated at λ = 3.02 and 3.32 μm. Hence, the mid-IR waveguide sensor enabled an accurate and instantaneous analysis of hydrocarbon gas mixtures.