M-line spectroscopy on mid-infrared Si photonic crystals for fluid sensing and chemical imaging

Lavchiev, Ventsislav; Jakoby, Bernhard; Hedenig, Ursula; Grille, Th.; Kirkbride, James M. R.; Ritchie, Grant A. D.

doi:10.1364/oe.24.000262

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…For example, a sensor structure consists of parallel PC waveguides has been designed for fluid sensing and chemical imaging in Ref. [41]. Moreover, a holey and a slotted PC waveguide structures that are based on Si are designed to detect Triethylphosphate at MIR wavelength [42].…”

Section: Potential Fabrication Platform For Proposed Pc Based Sensormentioning

confidence: 99%

Mid-infrared T-shaped photonic crystal waveguide for optical refractive index sensing

Turduev

Giden

Babayigit

et al. 2017

Sensors and Actuators B: Chemical

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In this paper, we propose and design a new type of an integrated optical sensor that performs sensing in a wide wavelength range corresponding to mid-infrared (mid-IR) spectrum. By engineering the structural parameters of square-lattice photonic crystal (PC) slab incorporated with a T-shaped air-slot, strong light confinement and interaction with the analytes are assured. Numerical analyses in the time and frequency domain are conducted to determine the structural parameters of the design. The direct interaction between the slot waveguide mode and the analyte infiltrated into the slot gives rise to highly sensitive refractive index sensors. The highest sensitivity of the proposed T-slotted PC sensor is 1040 nm/RIU within the range of analytes’ refractive indices n = 1.05-1.10, and the overall sensitivity corresponding to the higher refractive index range of n = 1.10-1.30 is around 500 nm/RIU. Moreover, for a realistic PC slab structure, we determined an average refractive index sensitivity of 530 nm/RIU within the range of n = 1.10-1.25 and an average sensitivity of 390 nm/RIU within the range of n = 1.00-1.30. Furthermore, we speculate on the possible approach for the fabrication and the optical characterization of the device. The assets of the device include being compact, having a feasible measurement and fabrication technique, and possessing label-free sensing characteristic. We expect that the presented work may lead to the further development of the mid-IR label-free biochemical sensor devices for detection of various materials and gases in the near future.Peer ReviewedPostprint (published version

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Section: Potential Fabrication Platform For Proposed Pc Based Sensormentioning

confidence: 99%

Mid-infrared T-shaped photonic crystal waveguide for optical refractive index sensing

Turduev

Giden

Babayigit

et al. 2017

Sensors and Actuators B: Chemical

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“…We recently have worked on silicon based waveguides which interact with fluid samples placed in their evanescent fields, see, e.g. [30,31]. We expect that there will be significant developments in this spectral range as integrated photonics technology thus far is concentrated on the near infrared but condition monitoring applications would require mid-IR absorption data.…”

Section: Review On Selected Physical Sensor Devices and Device Princi...mentioning

confidence: 99%

Fluidic Physical Sensors and Sensor Systems

Jakoby

2016

7th Forum on New Materials - Part D

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Silicon-based MEMS technology has furthered the introduction of sensors and actuators in many applications. Particularly in inertial sensing, where no contact with a medium to be sensed is required, highly reliable and cost-effective solutions have been developed. For application in fluidic environments, special demands regarding the interaction can occur. Also, silicon-based technology is not cost-effective in low-volume applications.In our recent work, we thus consider hybrid technologies and concentrate on physical sensor principles, which often provide more robustness in process control and condition monitoring than dedicated chemical sensors featuring chemical reactions with the environment by means of specific chemical interfaces. The latter are frequently prone to reliability issues, e.g. due to poisoning, drift, etc. Examples for physical parameters are thermal and electrical conductivity, permittivity, viscosity, speed of sound, and density. In this contribution, sensing concepts addressing these target parameters are reviewed.

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“…Among the sensing approaches, optical techniques in the infrared fingerprint region of the investigated substance are particularly promising because of their high selectivity. The possibility to use photonic structures like waveguides for evanescent-wave absorption sensing was recently discussed for liquids [1]. Recently we also demonstrated that silicon waveguides with sub-wavelength dimensions can be used as sensing units for carbon dioxide detection [2].…”

Section: Introductionmentioning

confidence: 99%

Evanescent-Wave Gas Sensing Using an Integrated Thermal Light Source

Consani

Ranacher

Tortschanoff

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

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The last years showed an increased request for miniaturised, CMOS-compatible gas detectors. In contrast to sensors utilizing metal-oxide chemical interfaces, optical strategies are potentially faster and more robust. Recently we demonstrated CO2 detection by evanescent-wave absorption in the mid-infrared using a combination of an external laser source and silicon waveguides based on CMOS technology. We now go one step further and demonstrate the feasibility of detection of CO2 down to a concentration of 3% with a low-cost integrated thermal source. These results are promising for further technological developments towards on-chip mid-infrared photonic gas sensors, and new designs are currently devised to increase the yet relatively low sensitivity.

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M-line spectroscopy on mid-infrared Si photonic crystals for fluid sensing and chemical imaging

Cited by 10 publications

References 23 publications

Mid-infrared T-shaped photonic crystal waveguide for optical refractive index sensing

Mid-infrared T-shaped photonic crystal waveguide for optical refractive index sensing

Fluidic Physical Sensors and Sensor Systems

Evanescent-Wave Gas Sensing Using an Integrated Thermal Light Source

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