Mid infrared polarization independent tapered waveguide based multianalyte sensor- a theoretical study

IF 0.9 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Arpita Mishra, K. Rana, Preetam Kumar, T. Srinivas
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引用次数: 0

Abstract

Group-IV photonics has gained a lot of interest in recent years due to its CMOS compatibility. Silicon on Insulator (SOI) has dominated the optical and optoelectronics field for past decades. On the other hand Germanium based platform, GeOI is another promising candidate for the above mentioned field.1 It has wide application in Mid Infrared Sensing due to it’s abundance, transparency and high index contrast (Δn = 2.6 at 3 μm) with reference to silicon on insulator. In order to take the advantage of wide transparency of Germanium in the Mid Infrared applications like chemical sensing, where most hazardous chemical molecules have their fingerprints, we have designed a compact adiabatic tapered waveguide2-4 sensor based on evanescent wave coupling which will be able to sense more than six analytes (Carbon dioxide (CO2), Nitrous oxide (N2O), Nitrogen dioxide (NO2), Nitric oxide (NO), Ammonia (NH3), Ethylene (C2H4), Acetylene (C2H2), Hydrogen Cyanide (HCN) and Methane (CH4)) having absorption peaks in between 2.5 to 3.5 μm. The proposed device provide a suitable method for label-free detection of target molecules and can be integrated on-chip for industrial and environmental monitoring , health analysis and food processing which can be leveraged over hefty conventional spectrometer like Fourier Transform Infrared Spectroscopy (FTIR). We have also studied and found an optimum tapered length of 40 μm for the proposed geometry, having more than 80 % transmission for both fundamental Transverse Electric (TE) and Transverse Magnetic (TM) mode making it polarisation insensitive.
基于中红外偏振无关锥形波导的多分析物传感器的理论研究
群- iv光子学由于其CMOS兼容性近年来获得了很多关注。在过去的几十年里,绝缘体上硅(SOI)一直主导着光学和光电子学领域。另一方面,基于锗的平台GeOI是上述领域的另一个有希望的候选者与绝缘体上硅相比,它具有丰富、透明和高折射率对比度(Δn = 2.6 at 3 μm)的特点,在中红外传感中有着广泛的应用。为了利用锗在化学传感等中红外应用中的广泛透明度,大多数危险化学分子都有指纹,我们设计了一种基于倏逝波耦合的紧凑绝热锥形波导2-4传感器,该传感器能够感应六种以上的分析物(二氧化碳(CO2),氧化亚氮(N2O),二氧化氮(NO2),一氧化氮(NO),氨(NH3),乙烯(C2H4),乙炔(C2H2),氰化氢(HCN)和甲烷(CH4)的吸收峰在2.5 ~ 3.5 μm之间。该装置为目标分子的无标签检测提供了一种合适的方法,可以集成在芯片上,用于工业和环境监测、健康分析和食品加工,可以利用傅立叶变换红外光谱(FTIR)等大型传统光谱仪。我们还研究并发现,对于所提出的几何形状,最佳锥形长度为40 μm,在基本横向电(TE)和横向磁(TM)模式下具有超过80%的透射率,使其极化不敏感。
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来源期刊
Opto-Electronics Review
Opto-Electronics Review 工程技术-工程:电子与电气
CiteScore
1.90
自引率
12.50%
发文量
0
审稿时长
>12 weeks
期刊介绍: Opto-Electronics Review is peer-reviewed and quarterly published by the Polish Academy of Sciences (PAN) and the Association of Polish Electrical Engineers (SEP) in electronic version. It covers the whole field of theory, experimental techniques, and instrumentation and brings together, within one journal, contributions from a wide range of disciplines. The scope of the published papers includes any aspect of scientific, technological, technical and industrial works concerning generation, transmission, transformation, detection and application of light and other forms of radiative energy whose quantum unit is photon. Papers covering novel topics extending the frontiers in optoelectronics or photonics are very encouraged. It has been established for the publication of high quality original papers from the following fields: Optical Design and Applications, Image Processing Metamaterials, Optoelectronic Materials, Micro-Opto-Electro-Mechanical Systems, Infrared Physics and Technology, Modelling of Optoelectronic Devices, Semiconductor Lasers Technology and Fabrication of Optoelectronic Devices, Photonic Crystals, Laser Physics, Technology and Applications, Optical Sensors and Applications, Photovoltaics, Biomedical Optics and Photonics
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