Selective Mid-IR Metamaterial-Based Gas Sensor System: Proof of Concept and Performances Tests

Abstract

In this paper, we propose a highly selective and efficient gas detection system based on a narrow-band IR metasurface emitter integrated with a resistive heater. In order to develop the sensor for the detection of specific gases, both the microheater and metasurface structures have been optimized in terms of geometry and materials. Devices with different metamaterial structures and geometries for the heater have been tested. Our prototype showed that the modification of the spectral response of metasurface-based structures is easily achieved by adapting the geometrical parameters of the plasmonic micro-/nanostructures in the metasurface. The advantage of this system is the on-chip integration of a thermal source with broad IR radiation with the metasurface structure, obtaining a compact selective radiation source. From the experimental data, narrow emission peaks (FWHM as low as 0.15 μm), corresponding to the CO2, CH4, and CO absorption bands, with a radiant power of a few mW were obtained. It has been shown that, by changing the bias voltage, a shift of a few tens of nm around the central emission wavelength can be obtained, allowing fine optimization for gas detection applications.

Dual-band infrared metamaterial perfect absorber for narrow-band thermal emitters

“…To further elucidate the advantages of our proposed MM, we conducted a comparative analysis on the full width at half maximum (FWHM) between our MM and other studies, as shown in table 2. Our MM offered the advantage of a narrower emission band with a reduced FWHM, compared to the studies in [27,31] and [32]. The emission power of our metasurface at a temperature of 300 • C was approximately 1.04 mW, which was three times lower than the reported value of 3 mW in [27].…”

Advances in Engine Efficiency: Nanomaterials, Surface Engineering, and Quantum-Based Propulsion

“…Another example is the work by Mihai et al [67], which proposed a metamaterialbased device consisting of an array of cylindrical pillars made of a non-linear material. When an incident electromagnetic wave was incident on the device, the nonlinear material generated harmonics at frequencies different from the incident frequency, which in turn generated a net force on the device due to the asymmetric radiation of the harmonics.…”

Greenhouse Gas Detection Based on Infrared Nanophotonic Devices

“…7(a), the selection of wavelength is achieved by adjusting the geometry of the MPA and changing the bias. Using this method, Dana Cristea's team [110] achieved narrow-band CO 2 , CO, and CH 4 detection with high selectivity of the whole system.…”