Phononic crystals with one-dimensional defect as sensor materials

Aly, Arafa H.; Mehaney, Ahmed

doi:10.1007/s12648-017-0989-z

Cited by 52 publications

(28 citation statements)

References 16 publications

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“…By equating Eqs. (13) and 15, we can obtain the relationship between the state vectors of the i À 1 ðÞ th unit cells and the ith unit cell in the following form:…”

Section: Characteristic Of the Dispersion Relationmentioning

confidence: 99%

“…From the scientific point of view, we should mention that the physical nature of PnCs is different from one of photonic crystals, as well as semiconductors. Generally, the various forms of waves are referred to as: electron waves as scalar waves and optical waves as vector waves, while elastic waves as tensor waves [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Phononic Crystals and Thermal Effects

Aly¹,

Mehaney²

2019

Photonic Crystals - A Glimpse of the Current Research Trends

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In this work, we demonstrate a comprehensive theoretical study of onedimensional perfect and defect phononic crystals. In our study, we investigate the elastic and shear waves with the influences of thermal effects. The numerical calculations based on the transfer matrix method (TMM) and Bloch theory are presented, where the TMM is obtained by applying the continuity conditions between two consecutive sub-cells. Also, we show that by introducing a defect layer in the perfect periodic structures (defect phononic crystals), we obtain localization modes within the band structure. These localized modes can be implemented in many applications such as impedance matching, collimation, and focusing in acoustic imaging applications. Then, we investigate the influences of the incident angle and material types on the number and intensity of the localized modes in both cases of perfect/defect crystals. In addition, we have observed that the temperature has a great effect on the wave localization phenomena in phononic band gap structures. Such effects can change the thermal properties of the PnCs structure such as thermal conductivity, and it can also control the thermal emission, which is contributed by phonons in many engineering structures.

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“…By equating Eqs. (13) and 15, we can obtain the relationship between the state vectors of the i À 1 ðÞ th unit cells and the ith unit cell in the following form:…”

Section: Characteristic Of the Dispersion Relationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phononic Crystals and Thermal Effects

Aly¹,

Mehaney²

2019

Photonic Crystals - A Glimpse of the Current Research Trends

Self Cite

View full text Add to dashboard Cite

show abstract

“…This type of layer arrangement facilitates the selective reflection of the waves and the generation of bandgaps and has been previously used to develop sensing applications. [11][12][13][14][15][16] In order to be able to use phononic crystals as sensors, specific transmission features need to be introduced into the frequency response of the system. Defect modes can be utilized for this purpose.…”

Section: Introductionmentioning

confidence: 99%

“…[17][18] Different sensing applications have been proposed using 1D phononic crystals. Some of the current measures used to characterize phononic crystal sensors are the frequency of maximum transmission, the peak amplitude, and the peak bandwidth [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Use of Transient Time Response as a Measure to Characterize Phononic Crystal Sensors

Arango¹,

Sánchez²,

Torres³

et al. 2018

Preprint

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Phononic crystals are periodic composite structures with specific resonant features that are gaining strength in the field as liquid sensors. The introduction of a structural defect in an otherwise periodic regular arrangement can generate a resonant mode, also called defect mode, inside the characteristic band gaps of phononic crystals. The morphology, as well as the frequency in which these defect modes appear, can give useful information on the composition and properties of an analyte. Currently, only gain, and frequency measurements are performed using phononic crystal sensors. Other measurements like the transient response have been implemented in resonant sensors such as quartz microbalances showing great results and proving to be a great complimentary measure to the gain and frequency measurements. In the present paper, a study of the feasibility of using the transient response as a measure to acquire additional information about the analyte is presented. Theoretical studies using the transmission line model were realized to show the impact of variations in the concentration of an analyte, in this case, lithium carbonate solutions, in the transient time of the system. Experimental realizations were also performed showing that the proposed measurement scheme presents significant changes in the resulting data, indicating the potential use of this measure in phononic crystal sensors. This proposed measure could be implemented as a stand-alone measure or as a compliment to current sensing modalities.

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“…There are many groups currently working on PnC sensors and some of the most interesting applications of this new technology are the measurement of the concentration of analytes in complex mixtures or the conversion rate in micro-reactors. Other interesting applications are the performance of point of care testing due to the portability of the technology [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Differential Phononic Crystal Sensor: Towards a Temperature Compensation Mechanism for Field Applications Development

Arango

Sánchez

Torres

et al. 2017

Sensors

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Phononic crystals are resonant structures with great potential to be implemented in applications as liquid sensors. The use of the symmetry reduction technique allows introducing relevant transmission features inside bandgaps by creating defect modes in a periodic regular structure. These features can be used as measures to quantify changes in the speed of sound of liquid samples that could be related to the concentration of analytes or the presence of pathogens among other interesting applications. In order to be able to implement this new technology in more challenging applications, such as biomedical applications, it is necessary to have a very precise and accurate measurement. Changes in temperature greatly affect the speed of sound of the liquid samples, causing errors in the measurements. This article presents a phononic crystal sensor that, by introducing additional defect modes, can carry out differential measurements as a temperature compensation mechanism. Theoretical studies using the transmission line model and analytes at various temperatures show that the proposed temperature compensation mechanism enhances the performance of the sensor in a significant way. This temperature compensation strategy could also be implemented in crystals with different topologies.

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Phononic crystals with one-dimensional defect as sensor materials

Cited by 52 publications

References 16 publications

Phononic Crystals and Thermal Effects

Phononic Crystals and Thermal Effects

Use of Transient Time Response as a Measure to Characterize Phononic Crystal Sensors

Differential Phononic Crystal Sensor: Towards a Temperature Compensation Mechanism for Field Applications Development

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