Design of a new two-dimensional optical biosensor using photonic crystal waveguides and a nanocavity

Mohsenirad, Hamideh; Olyaee, Saeed; Seifouri, Mahmood

doi:10.1515/plm-2015-0033

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…This type of biosensor could be deployed for real-time medical applications. Olyaee et al [8] 63.1 3960 Olyaee et al [16] 65.7 1999.86 Zhang et al [17] 20.34 605 Mohsenirad et al [14] 83.75 3051 Proposed 136.6 3915…”

Section: Discussionmentioning

confidence: 99%

Photonic crystal-based optical biosensor: a brief investigation

2018

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In this paper, a two-dimensional photonic crystal biosensor for medical applications based on two waveguides and a nanocavity was explored with different shoulder-coupled nanocavity structures. The most important biosensor parameters, like the sensitivity and quality factor, can be significantly improved. By injecting an analyte into a sensing hole, the refractive index of the hole was changed. This refractive index biosensor senses the changes and shifts its operating wavelength accordingly. The transmission characteristics of light in the biosensor under different refractive indices that correspond to the change in the analyte concentration are analyzed by the finite-difference time-domain method. The band gap for each structure is designed and observed by the plane wave expansion method. These proposed structures are designed to obtain an analyte refractive index variation of about 1-1.5 in an optical wavelength range of 1.250-1.640 µm. Accordingly, an improved sensitivity of 136.6 nm RIU −1 and a quality factor as high as 3915 is achieved. An important feature of this structure is its very small dimensions. Such a combination of attributes makes the designed structure a promising element for label-free biosensing applications.

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Section: Discussionmentioning

confidence: 99%

Photonic crystal-based optical biosensor: a brief investigation

2018

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“…Most of the photonic crystal biosensors are able to detect chemical and biochemical molecules. Biosensors can be designed according to different photonic crystal structures such as photonic crystal fibers [10,11], photonic crystal-based waveguides [12,13], photonic crystal-based resonators [14][15][16][17][18][19][20], and ring resonators [21][22][23][24]. Now, research on the photonic crystal resonator-based sensors has more attention.…”

Section: Photonic Crystal Chemical/biochemical Sensorsmentioning

confidence: 99%

“…A new sensor for sensing DNA molecules has been investigated in 2016 by Mohsenirad et al [16]. The structure of this biosensor consists of hexagonal lattice of air holes in a silicon slab and its operation based on two waveguides and nano-cavity that have been created in this lattice.…”

Section: Photonic Crystal Biosensor Based On Waveguide and Nano-cavitymentioning

confidence: 99%

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Photonic Crystal Chemical/Biochemical Sensors

Olyaee¹,

Mohsenirad²,

Bahabady³

2016

Progresses in Chemical Sensor

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In this chapter, the definitions of the photonic crystals (PhCs) are presented and the photonic crystal-based sensors are described. The structures of some photonic crystal biosensors that can detect chemical or biochemical molecules are also investigated. Sensing mechanism in the most photonic crystal sensors is based on the refractive index (RI) change mechanism. By binding the chemical or biochemical molecules to active sensing surface, the refractive index will be changed. So, the resonant wavelength or the intensity of the transmission spectrum is changed. This process can be used as a way to measure the concentration of the molecules. To simulate the optical wave behavior in the structure and evaluating the ability of biosensing, the two-dimensional finitedifference time-domain (2D-FDTD) and plane-wave expansion (PWE) methods are used. The sensors that are presented in this chapter are mostly based on photonic crystal resonators. Some structures based on micro-/nano-resonators, structures based on LX resonators, and structures based on ring resonator are investigated. Important parameters on sensing applications for these structures are also calculated.This chapter is organized as follows: an introduction to photonic crystal structures is presented in Section 1. Then, sensing mechanism in chemical sensors based on photonic crystals is described in Section 2. Quality factor, full width at half maximum (FWHM), free spectral range (FSR), detection limit (DL), and sensitivity are the most important parameters in sensing applications which are introduced in Section 3. Finally, the last section describes some structures of photonic crystal chemical/biochemical sensors.

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“…Optical sensors have many advantages over other types of sensors since they can be used in flammable, exotic, and long‐distant environments with immunity to electromagnetic interferences and real‐time response . Different schemes of optical sensors used so far operate on the basis of evanescent waves, Fabry–Perot cavities, modal interferences, surface plasmon resonance, and PC cavities (PCCs) . Among all these, PCCs that provide strong field confinement and long lifetime show higher sensitivity to the refractive index (RI) change in the air holes which results in resonance wavelength shift .…”

Section: Introductionmentioning

confidence: 99%

A Highly Accurate Refractive Index Sensor with Two Operation Modes Based on Photonic Crystal Ring Resonator

Vakili

Noori

2019

Annalen der Physik

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A 2D hole-type hexagonal lattice photonic crystal is utilized, herein, to detect the refractive index change of the material infiltrated into the designed circular sensing area which also resembles a ring resonator. The accuracy of the detection process is enhanced considering the simultaneous shift of the resonance wavelengths and the intensity modulation which occur in two separate spectral regions. The presented structure has the ability to detect liquids, material concentrations in fluids and gases having refractive indices in the range of n = 1-2 with sensitivity and quality factor of 61 nm/RIU and 3000, respectively, for resonance-wavelength-shift-based operation. The detection range of n = 1-1.4 with the sensitivity of S = 0.69 NI/RIU is achieved for the intensity-based measurement and the results show good linearity in the operating range.

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Design of a new two-dimensional optical biosensor using photonic crystal waveguides and a nanocavity

Cited by 11 publications

References 9 publications

Photonic crystal-based optical biosensor: a brief investigation

Photonic crystal-based optical biosensor: a brief investigation

Photonic Crystal Chemical/Biochemical Sensors

A Highly Accurate Refractive Index Sensor with Two Operation Modes Based on Photonic Crystal Ring Resonator

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