A highly sensitive and compact plasmonic ring nano-biosensor for monitoring glucose concentration

Abstract

In this study, a new plasmonic biosensor is proposed, which is highly sensitive with a compact structure, based on numerical methods for glucose concentration monitoring in different samples. The biosensor is based on a metal-insulator-metal waveguide and a ring resonator, and the calculated results are analyzed. The glucose biosensor operation is based on the refractive index of the glucose solution in the structure. In this study, to improve the sensitivity of the biosensor, the effect of the inner radius size parameter on spectral sensing has been fully analyzed. This biosensor in resonance wavelengths has a linear relationship with the refractive index of the glucose solution. In this structure, the maximum linear sensitivity is in glucose concentration. In addition, compared to other similar sensors, this biosensor has a label-free detection basis and has a very simple and ultra-compact structure: its size is . Considering the special features of this sensor, it could be used as optical on-chip biosensors for glucose concentration monitoring.

A multiple cancer cell optical biosensing metastructure realized by CPA

“…Due to the ability of efficient and precise detection of the RI, it can be widely used in the biomedical field like in the concentration detection of glucose aqueous solution and detection of single waterborne bacteria. 31,32…”

“…Based on eqn (15), the APs forming based on the CPA of the OBM at different fs are calculated. When the value of Dj 2 is 01, a sharp AP forms at about f = 108.92 THz in the case of n D = 1.66.…”

“…Due to the ability of efficient and precise detection of the RI, it can be widely used in the biomedical field like in the concentration detection of glucose aqueous solution and detection of single waterborne bacteria. 31,32 To logically and methodically show the innovations of the OBM, Table 5 lists some related works (cancer cell detection based on optical RI sensing) done before and compares this work with them. The obtained high Q enables more accurate detection of cancer cells.…”

“…13 Romano et al 14 designed an OBM for protein sensing based on photonic crystals supporting bound states in the continuum. Ghorbani et al 15 developed a novel OBM based on numerical techniques for monitoring glucose content in various samples. Sui et al 16 put forward new ideas for the photonic spin Hall effect and designed an OBM with multiple functions based on it.…”

Microstructural characteristics of sandwiched T-shaped metamaterials for three-port splitting

“…In recent years, various multi-port output beam splitters have been proposed, such as even-port beam splitter [6][7][8][9], odd-port output beam splitter [10][11][12], and polarization selective beam splitter [13,14]. Among them, the three-port beam splitter has the features of simple structure and large manufacturing tolerance, so it is widely used in pulse detection [15], sensors [16][17][18][19][20][21], signal processing [22][23][24], and photonic crystal fabrication [25,26]. Therefore, it is necessary to propose an efficient three-port diffraction beam splitter.…”