Tunable Mid-Infrared Nanoscale Graphene-Based Refractive Index Sensor

Dolatabady, Alireza; Asgari, Somayyeh; Granpayeh, Nosrat

doi:10.1109/jsen.2017.2778003

Cited by 69 publications

(14 citation statements)

References 45 publications

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“…Therefore, the FOM values of the two modes decrease with increasing n 3 ( Figure 6 d). Nevertheless, compared to other graphene-based refractive index sensors [ 48 , 49 ], this sensor exhibits an excellent sensing performance with high S and FOM values. Most notably, this sensor has an obvious advantage in measuring various gas surroundings with low refractive index values, because the S x 1 mode exhibits higher FOM values than the other sensor [ 50 ] in this case.…”

Section: Transmission Characteristics Of This Grating With a Perpendi...mentioning

confidence: 99%

Excitation of Surface Plasmon Polariton Modes with Double-Layer Gratings of Graphene

et al. 2022

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A long-range surface plasmon polariton (SPP) waveguide, composed of double-layer graphene, can be pivotal in transferring and handling mid-infrared electromagnetic waves. However, one of the key challenges for this type of waveguide is how to excite the SPP modes through an incident light beam. In this study, our proposed design of a novel grating, consisting of a graphene-based cylindrical long-range SPP waveguide array, successfully addresses this issue using finite-difference time-domain simulations. The results show that two types of symmetric coupling modes (SCMs) are excited through a normal incident light. The transmission characteristics of the two SCMs can be manipulated by changing the interaction of the double-layer gratings of graphene as well as by varying various parameters of the device. Similarly, four SCMs can be excited and controlled by an oblique incident light because this light source is equivalent to two orthogonal beams of light. Furthermore, this grating can be utilized in the fabrication of mid-infrared optical devices, such as filters and refractive index sensors. This grating, with double-layer graphene arrays, has the potential to excite and manipulate the mid-infrared electromagnetic waves in future photonic integrated circuits.

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Section: Transmission Characteristics Of This Grating With a Perpendi...mentioning

confidence: 99%

Excitation of Surface Plasmon Polariton Modes with Double-Layer Gratings of Graphene

et al. 2022

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“…In the literature, different FOM definitions can be found depending on the scenario and the application conditions of the sensor. Some authors consider, at a fixed frequency, the transmission change induced by a change in the refractive index [29,30], FOM = ∆T /(T ∆n) where ∆T /T is the normalized change in the transmission spectra and ∆n is the change in the refraction index. This definition is convenient for single-frequency characterization systems, such as when lasers are used for illumination with one wavelength output.…”

Section: Performance Of Lossy Metasurfaces As Refraction Index Sensorsmentioning

confidence: 99%

Loss-induced performance limits of all-dielectric metasurfaces for terahertz sensing

Álvarez-Sanchis¹,

Vidal²,

Tretyakov³

et al. 2022

Preprint

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Metasurfaces providing resonances arising from quasi-bound states in the continuum have been proposed as sensors in the THz band due to the existence of strong resonances characterized by high quality factors. Controlling geometrical parameters, the quality factor can be adjusted and, theoretically, designed at will. However, losses in materials critically bound the metasurface performance and limit the quality factor of the resonances. For this reason, all-dielectric metasurfaces have been proposed as an alternative to metal-dielectric structures to reduce losses and achieve extreme functionalities. When implemented by low-loss materials, these structures are usually considered lossless and proposed as ultrasensitive sensors in the THz band. In this paper, we examine the effect of losses in all-dielectric metasurfaces considering realistic materials and study the limitations in the quality factor. In addition, we compare the performance of these structures as sensors with a nanostructure supporting extraordinary optical transmission. Our results show that material loss, even in low-loss materials, severely limits the sensing performance in all-dielectric metasurfaces, and that their performance can be surpassed by structures supporting extraordinary optical transmission.

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“…In addition, the waveguide can act as a carrier, on which 2D materials can be deposited, for novel RI sensors developments. Surface plasmon waves or evanescent wave are tuned by the liquid medium on the surface of Graphene [ 38 ] and MoS 2 [ 39 ] to realize RI sensing.…”

Section: Ri Sensing and Technologiesmentioning

confidence: 99%

Optofluidics Refractometers

Bai

Zhang

et al. 2018

Micromachines

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Refractometry is a classic analytical method in analytical chemistry and biosensing. By integrating advanced micro- and nano-optical systems with well-developed microfluidics technology, optofluidics are shown to be a powerful, smart and universal platform for refractive index sensing applications. This paper reviews recent work on optofluidic refractometers based on different sensing mechanisms and structures (e.g., photonic crystal/photonic crystal fibers, waveguides, whisper gallery modes and surface plasmon resonance), and traces the performance enhancement due to the synergistic integration of optics and microfluidics. A brief discussion of future trends in optofluidic refractometers, namely volume sensing and resolution enhancement, are also offered.

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Tunable Mid-Infrared Nanoscale Graphene-Based Refractive Index Sensor

Cited by 69 publications

References 45 publications

Excitation of Surface Plasmon Polariton Modes with Double-Layer Gratings of Graphene

Excitation of Surface Plasmon Polariton Modes with Double-Layer Gratings of Graphene

Loss-induced performance limits of all-dielectric metasurfaces for terahertz sensing

Optofluidics Refractometers

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