Effect of dispersion-enhanced sensitivity in a two-mode optical waveguide with an asymmetric diffraction grating

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Effect of dispersion-enhanced sensitivity in a two-mode optical waveguide with an asymmetric diffraction grating. / Tsarev, Andrei.

In: Sensors, Vol. 21, No. 16, 5492, 02.08.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{b98bcf39eab442fb84de2f36b32fec8c,

title = "Effect of dispersion-enhanced sensitivity in a two-mode optical waveguide with an asymmetric diffraction grating",

abstract = "Analysis of trends in the development of silicon photonics shows the high efficiency regarding the creation of optical sensors. The concept of bimodal sensors, which suggests moving away from the usual paradigm based only on single-mode waveguides and using the inter-mode interaction of guided optical waves in a two-mode optical waveguide, is developed in the present paper. In this case, the interaction occurs in the presence of an asymmetric periodic perturbation of the refractive index above the waveguide surface. Such a system has unique dispersion properties that lead to the implementation of collinear Bragg diffraction with the mode number transformation, in which there is an extremely high dependence of the Bragg wavelength on the change in the refractive index of the environment. This is called the “effect of dispersion-enhanced sensitivity”. In this paper, it is shown by numerical calculation methods that the effect can be used to create optical sensors with the homogeneous sensitivity higher than 3000 nm/RIU, which is many times better than that of sensors in single-mode waveguide structures.",

keywords = "Bimodal interaction, Finite difference time domain (FDTD) method, Numerical modeling, Optical sensors, Segmented grating, Silicon wire",

author = "Andrei Tsarev",

year = "2021",

month = aug,

day = "2",

doi = "10.3390/s21165492",

language = "English",

volume = "21",

journal = "Sensors",

issn = "1424-3210",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "16",

}

RIS

TY - JOUR

T1 - Effect of dispersion-enhanced sensitivity in a two-mode optical waveguide with an asymmetric diffraction grating

AU - Tsarev, Andrei

PY - 2021/8/2

Y1 - 2021/8/2

N2 - Analysis of trends in the development of silicon photonics shows the high efficiency regarding the creation of optical sensors. The concept of bimodal sensors, which suggests moving away from the usual paradigm based only on single-mode waveguides and using the inter-mode interaction of guided optical waves in a two-mode optical waveguide, is developed in the present paper. In this case, the interaction occurs in the presence of an asymmetric periodic perturbation of the refractive index above the waveguide surface. Such a system has unique dispersion properties that lead to the implementation of collinear Bragg diffraction with the mode number transformation, in which there is an extremely high dependence of the Bragg wavelength on the change in the refractive index of the environment. This is called the “effect of dispersion-enhanced sensitivity”. In this paper, it is shown by numerical calculation methods that the effect can be used to create optical sensors with the homogeneous sensitivity higher than 3000 nm/RIU, which is many times better than that of sensors in single-mode waveguide structures.

AB - Analysis of trends in the development of silicon photonics shows the high efficiency regarding the creation of optical sensors. The concept of bimodal sensors, which suggests moving away from the usual paradigm based only on single-mode waveguides and using the inter-mode interaction of guided optical waves in a two-mode optical waveguide, is developed in the present paper. In this case, the interaction occurs in the presence of an asymmetric periodic perturbation of the refractive index above the waveguide surface. Such a system has unique dispersion properties that lead to the implementation of collinear Bragg diffraction with the mode number transformation, in which there is an extremely high dependence of the Bragg wavelength on the change in the refractive index of the environment. This is called the “effect of dispersion-enhanced sensitivity”. In this paper, it is shown by numerical calculation methods that the effect can be used to create optical sensors with the homogeneous sensitivity higher than 3000 nm/RIU, which is many times better than that of sensors in single-mode waveguide structures.

KW - Bimodal interaction

KW - Finite difference time domain (FDTD) method

KW - Numerical modeling

KW - Optical sensors

KW - Segmented grating

KW - Silicon wire

UR - http://www.scopus.com/inward/record.url?scp=85112377866&partnerID=8YFLogxK

U2 - 10.3390/s21165492

DO - 10.3390/s21165492

M3 - Article

C2 - 34450934

AN - SCOPUS:85112377866

VL - 21

JO - Sensors

JF - Sensors

SN - 1424-3210

IS - 16

M1 - 5492

ER -

ID: 29233448