Mid-infrared gas detection using optically immersed, room-temperature, semiconductor devices

Crowder, John Graham; Hardaway, H. R.; Elliott, C.T.

doi:10.1088/0957-0233/13/6/308

Cited by 15 publications

(10 citation statements)

References 6 publications

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“…The study of widely used gas sensing methods based on the optical absorption measurements at particular wavelengths is the main focus of this article. Being non-dispersive gas sensing methods utilizing spectro-photometry, non-dispersive infrared, tunable diode laser spectroscopy and photo-acoustic spectroscopy [9][10][11].…”

Section: High Sensitivity and Selectivitymentioning

confidence: 99%

Optical Gas Sensors

Mishra¹,

Rashmi²,

Sukriti³

2023

Metal-Oxide Gas Sensors

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Miniature and highly efficient optical-based gas sensors have gained enormous consideration over the last few years. Materials based on the group-IV elements, namely silicon, germanium and their compounds, are deemed to be the potential candidates for the optical gas sensors. Optical gas sensors based on these materials offer appreciable sensitivity and high-density integration. Basically, these sensors paved the path for the flexible applications areas, namely internet of things (IoT), point-of-care testing, information and communication technology, etc. because of their potential candidature for being integrated with the several other photonic or electronic devices for on-chip signal processing and communication. Herein, we review optical gas sensors and discuss their basic principles, applications, recent advancement in the devices, etc. Gas concentrations can be easily detected and measured utilizing the characteristic optical absorption of gas species. This detection is crucial both for interpretation and observing of a wider range of phenomena extended from industrial practices to overall environmental change. Based on the findings, this review extends over a comprehensive overview of plethora of individual gas detection techniques, namely non-dispersive infrared, spectro-photometry, tunable diode laser spectroscopy and photo acoustic spectroscopy. This article focalizes over the discussion of the basic principle of the techniques introduced, their latest advancements and performance constraints, etc.

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Section: High Sensitivity and Selectivitymentioning

confidence: 99%

Optical Gas Sensors

Mishra¹,

Rashmi²,

Sukriti³

2023

Metal-Oxide Gas Sensors

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“…The pulsed laser sources operating in the 3~5 μm mid-infrared range have many particular characteristics such as containing important transparent window of the atmosphere and nearly all fundamental rovibrational absorption bands of molecules, and have been widely used in many application fields such as defense, laser microsurgery, mid-infrared spectroscopy, remote communication [1][2][3][4]. Benefitting from simple structure, strong expandability and excellent tuning performance, the nonlinear frequency down-conversion including OPO and DFG using the PPLN crystals has become one of the most promising candidates to generate pulsed midinfrared radiation.…”

Section: Introductionmentioning

confidence: 99%

Highly-Efficient Pulsed Mid-Infrared Generation Based on Intracavity Difference Frequency Mixing

Wang

et al. 2021

IEEE Photonics J.

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We demonstrated highly-efficient pulsed mid-infrared generation based on intracavity difference frequency mixing inside a continuous-wave (CW) PPLN optical parametric oscillator (OPO). The near-infrared pulsed fiber source was located at 1120 nm with variable pulse width and repetition rate. The pump source of OPO was a CW linearly-polarized high-power 1060 nm fiber laser. The 1120 nm and 1060 nm pump beams were simultaneously incident into the OPO cavity. The 1060 nm pump beam built parametric oscillation firstly and generated high-power resonant signal beam inside the cavity. By controlling the PPLN temperature properly, the phase-matched difference frequency generation (DFG) occurred between the signal beam and 1120 nm pulsed pump beam in the PPLN crystal. Finally, the pulsed 1120 nm pump beam was successfully transformed to 3593 nm mid-infrared radiation at every power level and temporal characteristic. Both the slope efficiency and pump-to-idler conversion efficiency of the intracavity DFG process reached over 20%. In addition, the pulse shape of newly generated 3593 nm idler beam was basically the same as 1120 nm pump beam. The experimental results exhibited huge potential in frequency down conversion of low-power laser sources with special temporal characteristics.

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“…Extremely narrow band gap found in these SLs [1] makes them important for fabrication of far infrared detectors and light emitting diodes that have potential applications such as pollutant gas sensing, molecular spectroscopy, process monitoring, disease analysis and infrared scene projection. [2][3][4] The cyclotron resonance measurements in these SLs found out linear in-plane electron spectrum starting from unusually small energy of about 10 meV. [5] In general, nonparabolicity of electron spectrum is well known.…”

Section: Introductionmentioning

confidence: 99%

In-plane spectrum in superlattices

2017

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We show that the existing theory does not give correct in-plane spectrum of superlattices at small in-plane momentum. Magneto-absorption experiments demonstrate that the energy range of the parabolic region of the spectrum near the electron subband bottom is by the order of magnitude lower than the value predicted by the traditional approach. We developed a modified theory according to which the energy range of the parabolic region and carrier in-plane effective masses are determined by the effective bandgap of the superlattice rather than by the bulk bandgaps of the superlattice layers. The results of the new theory are consistent with the experiment

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Mid-infrared gas detection using optically immersed, room-temperature, semiconductor devices

Cited by 15 publications

References 6 publications

Optical Gas Sensors

Optical Gas Sensors

Highly-Efficient Pulsed Mid-Infrared Generation Based on Intracavity Difference Frequency Mixing

In-plane spectrum in superlattices

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