A Microring Resonator Sensor for Sensitive Detection of 1,3,5-Trinitrotoluene (TNT)

Orghici, Rozalia; Lützow, Peter; Burgmeier, Jörg; Koch, Jan; Heidrich, H.; Schade, Wolfgang; Welschoff, Nina; Waldvogel, Siegfried R.

doi:10.3390/s100706788

Cited by 73 publications

(47 citation statements)

References 15 publications

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“…These optical microresonators have been manufactured with different morphologies in the form of capillaries [1][2][3][4], discs [5], rings [6 -8], toroids [9], spheres [10], bubbles [11], bottles [12], etc, using different materials such as silicon, silica, polymers, with applications in areas such as biology [13], medicine [4], physics [14], chemistry [10] and specifically in the area of sensors for the measurement of temperature [15], humidity [12], refractive index [16] and some other physical variables of interest [6]. Specifically, the cylindrical optical microcavities that have been made using different types of materials, experience a series of resonances commonly known as Whispering Gallery modes WGMs, which are characteristic of the cavities that have rotational symmetry and can be explained through the phenomenon of total internal reflection occurring within these cavities when they are excited through an external source.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of an optical sensor based on capillary microresonator for the measurement the hydrostatic pressure in microfluidics

Padilla¹,

Piñeres²,

Torres³

2018

EasyChair Preprints

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Abstract. In this investigation, we report the study of an optical device for the measurement of hydrostatic pressure in fluids. The device studied is a sensor based on a dielectric optical resonator in the form of a capillary that confines the light in its interior through the phenomenon of total internal reflection. In the analytical study of the sensor, the excitation of the azimuthal modes WGMs inside the resonant cavity is considered, so that their sensitivity to changes in the hydrostatic pressure was analyzed as a function of the displacement of wavelengths of resonances in the cavity.

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Section: Introductionmentioning

confidence: 99%

Sensitivity of an optical sensor based on capillary microresonator for the measurement the hydrostatic pressure in microfluidics

Padilla¹,

Piñeres²,

Torres³

2018

EasyChair Preprints

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“…The resonance condition of an MRR shows high sensitivity to small changes in the surrounding refractive index. Enhanced sensitivity and selective gas detection can be achieved by chemical functionalization of the MRR surface [14,15]. More importantly, unlike the widely used electrical gas sensors which are in general restricted to conductive materials, MRRs can be functionalized with a wide range of materials for selective and sensitive gas detection.…”

Section: Introductionmentioning

confidence: 99%

“…Straight forward multiplexing of sensor arrays on a chip is another potential benefit of the silicon nano-photoincs platform for compact multi-gas analysis [11]. One of the silicon photonic components proving to be suitable for sensing applications is an optical micro-ring resonator (MRR) [11][12][13][14][15]. The resonance condition of an MRR shows high sensitivity to small changes in the surrounding refractive index.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, this device still remains complex due to the requirement for an expensive light source and phase sensitive (lock-in) instrumentation. With the potential to selectively detect sub ppm -ppb concentrations using chemically functionalized MRRs, silicon nanophotonic gas sensors can take advantage of their miniature feature and potentially low cost CMOS fabrication for portable sensing applications [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Selective and reversible ammonia gas detection with nanoporous film functionalized silicon photonic micro-ring resonator

Yebo¹,

Sree²,

Levrau³

et al. 2012

Opt. Express

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Portable, low cost and real-time gas sensors have a considerable potential in various biomedical and industrial applications. For such applications, nano-photonic gas sensors based on standard silicon fabrication technology offer attractive opportunities. Deposition of high surface area nano-porous coatings on silicon photonic sensors is a means to achieve selective, highly sensitive and multiplexed gas detection on an optical chip. Here we demonstrate selective and reversible ammonia gas detection with functionalized silicon-on-insulator optical micro-ring resonators. The micro-ring resonators are coated with acidic nano-porous aluminosilicate films for specific ammonia sensing, which results in a reversible response to NH 3 with selectivity relative to CO 2 . The ammonia detection limit is estimated at about 5 ppm. The detectors reach a steady response to NH 3 within 30 and return to their base level within 60 to 90 seconds. The work opens perspectives on development of nano-photonic sensors for real-time, non-invasive, low cost and light weight biomedical and industrial sensing applications. ©2012 Optical Society of America

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“…Furthermore, many applications in medical diagnostics require large dynamical ranges of the sensor systems. During an acute phase response the cardiovascular risk biomarker C-reactive protein (CRP) increases by factors of up to 10 000 in human serum [6]. In general, concentrations of proteins in human blood plasma can vary over up to 11 orders of magnitude [7].…”

Section: Introductionmentioning

confidence: 99%

Microring resonator arrays for label-free biochemical multiparameter analysis

Pergande¹,

Lützow²,

Gausa³

et al. 2012

Biomedical Engineering / Biomedizinische Technik

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There exist growing demands for robust, reliable, low-cost and easy-to-use sensor systems capable of performing multiparameter analysis for biomedical diagnostics. We have recently demonstrated a particularly economic approach to analyze large arrays of microring resonator (MRR) sensor elements coupled to a single bus waveguide. The sensor elements can be individually functionalized to specifically promote the accumulation of target molecules. The binding of target molecules to the surface of a particular MRR results in a resonance displacement to longer wavelengths, which can be measured with high accuracy. In order to measure the response of the individual MRR from an array to external stimuli, we employ a special frequency modulation scheme in which each MRR is independently modulated and phase sensitive lock-in detection is used to filter the respective frequency component from the superimposed complex transmission spectrum of the bus waveguide. We fabricated test arrays comprising up to 12 MRR coupled to a single bus waveguide. A silicon nitride based material system was chosen to fabricate the devices. Each element of an array is equipped with a platinum heater electrode for thermo-optical modulation. A clear readout of the individual MRR resonance frequencies was possible by employing the modulation scheme above. Furthermore, we demonstrated a bulk refractive index sensitivity of 190 nm/RIU for a frequency modulated MRR. With our first results, we point out the large potential for multiplexed label-free detection of diverse bio molecular compounds. Due to the miniaturization of the multisensor arrays the realization of portable sensor systems will be feasible.

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A Microring Resonator Sensor for Sensitive Detection of 1,3,5-Trinitrotoluene (TNT)

Abstract: A microring resonator sensor device for sensitive detection of the explosive 1,3,5-trinitrotoluene (TNT) is presented. It is based on the combination of a silicon microring resonator and tailored receptor molecules.

Cited by 73 publications

References 15 publications

Sensitivity of an optical sensor based on capillary microresonator for the measurement the hydrostatic pressure in microfluidics

Sensitivity of an optical sensor based on capillary microresonator for the measurement the hydrostatic pressure in microfluidics

Selective and reversible ammonia gas detection with nanoporous film functionalized silicon photonic micro-ring resonator

Microring resonator arrays for label-free biochemical multiparameter analysis

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