Compact Submillimeter/Terahertz Gas Sensor With Efficient Gas Collection, Preconcentration, and ppt Sensitivity

Neese, Christopher F.; Medvedev, Ivan R.; Plummer, Grant M.; Frank, Arthur J.; Ball, Catherine; Lucia, Frank C. De

doi:10.1109/jsen.2012.2195487

Cited by 85 publications

(44 citation statements)

References 32 publications

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“…17 FT-MRR instruments best utilize the high power sources (>25 mW) to perform sensitive spectroscopy on roomtemperature gases, reaching the same sensitivity level 10,000 times faster than the fastest absorption-based AMC driven spectrometers described in the literature. 1,[18][19][20][21] The advantages of FT-based millimeter wave techniques are similar to those of Fourier transform nuclear magnetic resonance (FT-NMR) over absorption methods. As in FT-NMR, a variety of pulse sequences can be applied to extract more information than the ordinary absorption spectrum can provide.…”

Section: The Development Of Broadband Ft-mrrmentioning

confidence: 99%

Fourier transform molecular rotational resonance spectroscopy for reprogrammable chemical sensing

et al. 2015

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Molecular rotational resonance (MRR) spectroscopy gives spectral signatures with high chemical selectivity. At roomtemperature, the peak intensity of the MRR spectrum occurs in the 100 GHz -1 THz frequency range for volatile species with mass ≤ 100 amu. Advances in high-power sub-mm-wave light sources has made it possible to implement time-domain Fourier transform (FT) spectroscopy techniques that are similar to FT nuclear magnetic resonance (FT-NMR) measurements. In these measurements, the gas sample is excited by a short (200 ns) excitation pulse that creates a macroscopic sample polarization. The electric field of the subsequent transient molecular emission is detected using a heterodyne receiver and a high-speed digitizer. FT-MRR spectroscopy offers speed and sensitivity improvements over absorption spectroscopy. For chemical analysis, FT-MRR spectrometers combine the benefits of broad chemical coverage typical of gas chromatography -mass spectrometry (GC-MS) instruments and the direct measurement capabilities of infrared gas sensors all in a reprogrammable platform. Pulse sequence measurements can be implemented for advanced spectroscopic analysis. Trace level quantitation of volatile species at ppbv concentration can be performed on the time scale of a minute. In cases where the sample is a complex mixture, a double-resonance pulse sequence can be used to achieve chemical selectivity even in cases where spectral overlap occurs. These measurement capabilities are illustrated using the application of FT-MRR spectroscopy to residual solvent analysis of pharmaceutical products.

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Section: The Development Of Broadband Ft-mrrmentioning

confidence: 99%

Fourier transform molecular rotational resonance spectroscopy for reprogrammable chemical sensing

et al. 2015

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“…In the past few years, the advances of low cost high performance CMOS technology [1][2][3][4][5][6][7][8][9][10][11][12][13][14] and low loss, low cost organic packaging has opened a new perspective for system designers and service providers since it enables the development of mmW radios at the same cost structure of radios operating in the gigahertz range or less. A fully integrated 60GHz CMOS/PCB based portable beamformer solution embedded into a standard QFN package, including embedded antenna phased array, is the foundation for a high volume manufacturing (HVM) low cost solution as shown in Figure 2.…”

Section: Millimeter Wave Digital Cmos Radio Architecturesmentioning

confidence: 99%

CMOS millimeter wave digital radio architectures for Communication and Sensing

Banerjee

Hanif

Shanthi

et al. 2013

2013 IEEE MTT-S International Microwave Symposium Digest (MTT)

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The mmW and sub-THz frequency bands hold enormous potential for high-speed multi-Gb/s communications as well as sensing and imaging applications. With the tremendous leap in the operating frequencies with scaling, CMOS becomes the technology of choice for highly integrated solutions for many of these applications, enabling smaller size, lower power consumption and lower cost. This paper will focus on the recent developments in radio architectures for gigabit wireless communication, radars and gas sensing in the 60 GHz, 77 GHz and 180 -300 GHz bands using standard digital CMOS technology. The authors will present a 200 GHz receiver front-end designed in a standard CMOS technology along with injection-locking based frequency generation schemes at mmW and THz frequencies.

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“…This is the case for the THz spectral region where the most intense pure rotational spectra of small and medium-sized molecules are typically found. Numerous applications such as, breath analysis [4], environmental surveillance [5,6], food spoilage monitoring [7], or detection of explosive taggants [8], should be feasible if sufficient instrument sensitivity and spectral resolution can be obtained. Despite numerous advances observed at THz frequencies including THz Quantum Cascade Lasers [9][10][11], solid-state electronic devices [12], photonic conversions [13], detectors [14,15], this spectral region remains hindered by its immature technology compared to the neighbouring microwave and infrared domains.…”

Section: Introductionmentioning

confidence: 99%

Terahertz gas phase spectroscopy using a high-finesse Fabry–Pérot cavity

Hindle¹,

Bocquet²,

Pienkina³

et al. 2019

Optica

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THz and submillimeter gas phase spectroscopy appears as the perfect tool for analytical chemical analysis due an exceptional degree of resolution. Despite many attractive applications such as breath analysis, environmental surveillance, food spoilage monitoring, or detection of explosive taggants, there is no commercially available versatile THz or submillimeter chemical analyzer. An important factor hindering the development of a THz chemical analyzer are the difficulties encountered to adapt ultrasensitive techniques, such as Cavity-Enhanced Techniques and Cavity Ring Down Spectroscopy to the THz and submillimeter domain. Here, we describe a low-cost high finesse THz resonator based on a low loss oversized corrugated waveguide along with high reflective photonic mirrors, and how those critical components enable a Fabry-Perot THz Absorption Spectrometer obtaining a kilometer equivalent interaction length. In addition, the intracavity optical power have allowed nonlinear interactions such as Lamb-Dip effect to be studied with a low-power emitter.

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Compact Submillimeter/Terahertz Gas Sensor With Efficient Gas Collection, Preconcentration, and ppt Sensitivity

Cited by 85 publications

References 32 publications

Fourier transform molecular rotational resonance spectroscopy for reprogrammable chemical sensing

Fourier transform molecular rotational resonance spectroscopy for reprogrammable chemical sensing

CMOS millimeter wave digital radio architectures for Communication and Sensing

Terahertz gas phase spectroscopy using a high-finesse Fabry–Pérot cavity

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