Optical sensor for hydrogen gas based on a palladium-coated polymer microresonator

Eryürek, Mustafa; Karadağ, Yasin; Taşaltın, Nevin; Kılınç, Necmettin; Kiraz, Alper

doi:10.1016/j.snb.2015.01.097

Cited by 47 publications

(26 citation statements)

References 37 publications

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“…In the transmission spectra, both TM and TE mode families are observed as depicted in Figure 5. In each measurement, one WGM is selected and analyzed using a Gaussian fitting algorithm 13 under changing RI of the ambient environment. Smaller wavelength for the same mode number is considered as the TM mode based on the result from the analytical calculations.…”

Section: Analytical Calculationsmentioning

confidence: 99%

Optical sensors of bulk refractive index using optical fiber resonators

Eryürek

Karadağ

Ghafoor

et al. 2017

Optical Sensors 2017

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Optical fiber resonator (OFR) sensor is presented for bulk liquid refractive index (RI) sensing. The sensing mechanism relies on the spectral shifts of whispering gallery modes (WGMs) of OFRs which are excited using a tapered fiber. OFR liquid RI sensor is fully characterized using water solutions of ethanol and ethylene glycol (EG). A good agreement is achieved between the analytical calculations and experimental results for both TE and TM polarizations. The detection limit for bulk RI is calculated to be between 2.7-4.7 × 10 −5 refractive index unit (RIU). The OFR sensor provides a robust, easy-to-fabricate and sensitive liquid refractive index sensor which can be employed in lab-on-a-chip applications.

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Section: Analytical Calculationsmentioning

confidence: 99%

Optical sensors of bulk refractive index using optical fiber resonators

Eryürek

Karadağ

Ghafoor

et al. 2017

Optical Sensors 2017

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“…On the other hand, optical gas sensors based on optical waveguides such as microring resonators (MRR) have also been developed for gas sensing [20][21][22][23][24][25][26][27][28][29][30]. In particular, an Si-MRR has a simple structure and a compact footprint and is promising for large scale integrated optical circuits.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Highly Sensitive Hydrogen Sensor Based on Pt-WO3/Si Microring Resonator

Matsuura

Yamasaku

Nishijima

et al. 2019

Sensors

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Hydrogen gas has attracted attention as a new energy carrier, and simple but highly sensitive hydrogen sensors are required. We fabricated an optical hydrogen sensor based on a silicon microring resonator (MRR) with tungsten oxide (WO 3 ) using a complementary metal-oxide-semiconductor (CMOS)-compatible process for the MRR and a sol-gel method for the WO 3 layer and investigated its sensing characteristics at device temperatures of 5, 20, and 30 • C. At each temperature, a hydrogen concentration of as low as 0.1 vol% was successfully detected. The gas sensitivity increased with decreasing temperature. The dependence of the sensitivity on the device temperature can be attributed to the thickness of tungsten bronze (H x WO 3 ) formed by WO 3 during exposure to hydrogen gas. In addition, a hydrogen gas sensor based on a silicon-MRR-enhanced Mach-Zehnder interferometer (MRR-MZI) is proposed and its significantly high sensing ability using improved changes in the transmittance of light is theoretically discussed.

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“…As compared to other methods, optical sensor devices promise to yield highly sensitive, relatively compact, low-cost, and reliable operation. To date, various different optical detection schemes benefiting from surface plasmon resonances [9,10], photonic crystals [11], Bragg gratings [12][13][14], optical fibers [15], and optical microresonators [16] have been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen sensors that use optical microresonators have great potential to possess very high sensitivities because of the high quality factors (Q-factors) of their optical resonances [17]. In a recent study [16], a hybrid structure of polymer microdisk microresonator coated with a coaxial thin palladium (Pd) layer, a highly favorable element for hydrogen detection [18][19][20], is presented with detection sensitivities down to 0.3%. The sensing mechanism in this study relies on the volumetric expansion of the Pd layer in the presence of hydrogen gas that results in the size change of the polymer microdisk.…”

Section: Introductionmentioning

confidence: 99%

Single-slot hybrid microring resonator hydrogen sensor

2017

Self Cite

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Photonic integrated circuits fabricated on silicon-on-insulator platforms offer convenient foundations to implement highly sensitive, compact, robust, and low-cost technology in sensing applications. The potential of this technology in hydrogen gas sensing is discussed in this study. A single-slot hybrid microring-resonator-(MRR) based hydrogen gas sensor utilizing a coaxial palladium (Pd) microdisk is demonstrated. Detection is based on expansion of Pd upon hydrogen exposure toward the slot between the outer radius of the Pd microdisk and the inner radius of the MRR and the subsequent shift of the whispering gallery modes (WGMs) propagating in the MRR. Finite-difference time-domain simulations indicate a sensitivity as high as 11.038 nm/% hydrogen, provided that optimum geometrical design parameters are chosen. This sensitivity value is ∼23 times higher than other existing WGM-based hydrogen sensor demonstrations.

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Optical sensor for hydrogen gas based on a palladium-coated polymer microresonator

Cited by 47 publications

References 37 publications

Optical sensors of bulk refractive index using optical fiber resonators

Optical sensors of bulk refractive index using optical fiber resonators

Characteristics of Highly Sensitive Hydrogen Sensor Based on Pt-WO3/Si Microring Resonator

Single-slot hybrid microring resonator hydrogen sensor

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