Design of high-sensitive biosensor based on cavity-waveguides coupling in 2D photonic crystal

Harhouz, Ahlam; Hocini, Abdesselam

doi:10.1080/09205071.2015.1012597

Cited by 45 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of very important characteristics of photonic crystal is its light confinement and controlling property. These characteristics allowed the crystal to use in various sensing applications [1][2][3]. The photonic crystal sensors has received considerable attention in developing label-free pressure sensor, besides, refractive index (RI) change is directly linked to the existence of the force onto a sensing surface of the device, the refractive index sensor can realize sensitive detection with small sample volumes.…”

Section: Introductionmentioning

confidence: 99%

Design of Pressure Sensor Based on Two-Dimensional Photonic Crystal

et al. 2017

View full text Add to dashboard Cite

In this work, we design a new pressure sensor based on two-dimensional photonic crystal waveguide coupled to a point-defect resonant microcavity. The mechanism of sensing is based on the change of the germanium refractive index as function of the hydrostatic pressure P . The resonant wavelength will shift when pressure variation induces change in the refractive indexes of the structure. The pressure variation causes the shifting of defect modes. The properties of the refractive index sensor are simulated using the finite-difference time-domain algorithm and the plane wave expansion method. These kinds of sensors have many advantages in compactness, high sensitivity, and various choices of materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of Pressure Sensor Based on Two-Dimensional Photonic Crystal

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The optimization of the sensing area in the MZI allows increasing the sensitivity that can be achieved, because it allows strong confinement of the light in the general waveguide and a long penetration depth of the evanescent field in the sensing area. Our device was evaluated as a biosensor, presenting a bulk sensitivity of 2828 nm/RIU and a surface sensitivity of 2021.85 nm/RIU, both with a power V g = 20 V, demonstrating a sensitivity greater than that achieved by similar devices available from experimental results in the scientific literature [41][42][43][44][45][46][47][48][49][50][51][52].…”

Section: Discussionmentioning

confidence: 98%

Electro-Optical Biosensor Based on Embedded Double-Monolayer of Graphene Capacitor in Polymer Technology

et al. 2021

View full text Add to dashboard Cite

In this work, we present an interferometric polymer-based electro-optical device, integrated with an embedded double-monolayer graphene capacitor for biosensing applications. An external voltage across the capacitor applies an electric field to the graphene layers modifying their surface charge density and the Fermi level position in these layers. This in turn changes the electro-optic properties of the graphene layers making absorption in the waveguide tunable with external voltages. Simultaneously, it is possible to appreciate that this phenomenon contributes to the maximization of the light-graphene interaction by evanescent wave in the sensing area. As a result, it is obtained large phase changes at the output of the interferometer, as a function of small variations in the refractive index in the cladding area, which significantly increasing the sensitivity of the device. The optimum interaction length obtained was 1.24 cm considering a cladding refractive index of 1.33. An absorption change of 129 dB/mm was demonstrated. This result combined with the photonic device based on polymer technology may enable a low-cost solution for biosensing applications in Point of Care (PoC) platform.

show abstract

“…A detailed comparison with other PhC sensors is carried out in terms of sensitivity, sensing range, and DR, as shown in table 1. Compared to most of 1D and 2D SiO 2 /Si PhC sensors [17,21,29,[46][47][48][49][50], our design has a higher sensitivity dual to the stronger light-localization of microcavity. Although the point-or linedefect construction can improve the sensitivity [46], the detectable RI range is too narrow so the sensing for low or high RI index analyte is limited.…”

Section: Effects Of Microcavity Size On the Sensor Performancementioning

confidence: 99%

Ultrawide-detection-range refractive index sensor based on a two-dimensional mirror-image photonic crystal microcavity

Sheng,

She,

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

In this work, a refractive index sensor is theoretically proposed based on a two-dimensional mirror-image SiO2/Si photonic crystal microcavity. The introduction of mirror-image microcavity effectively enhances the light localization and the coupling between light and liquid analyte. Results show that the sensor exhibits a high near-linear sensitivity of 493.5 nm/RIU with a narrow full-width at half-maximum of ~ 20 nm in a broad refractive index range of 1.0 ~ 1.5. Moreover, the detection resolution for the minimum variation of RI reaches to a level of 0.0002 RIU. For the analyses on the sensor performance (such as sensitivity, full-width at half-maximum), the dependences of all structure parameters are discussed in terms of the cylinder diameter, lattice constant, and microcavity size. This design is expected to detect the refractive index of wide-range liquid analytes in the fields of biology, chemistry, and medicine.

show abstract

Design of high-sensitive biosensor based on cavity-waveguides coupling in 2D photonic crystal

Cited by 45 publications

References 18 publications

Design of Pressure Sensor Based on Two-Dimensional Photonic Crystal

Design of Pressure Sensor Based on Two-Dimensional Photonic Crystal

Electro-Optical Biosensor Based on Embedded Double-Monolayer of Graphene Capacitor in Polymer Technology

Ultrawide-detection-range refractive index sensor based on a two-dimensional mirror-image photonic crystal microcavity

Contact Info

Product

Resources

About