Abstract Hyperbolic metamaterials (HMMs) are used to demonstrate extreme sensitivity biosensing by exciting their high‐ k modes. However, momentum couplers, such as subwavelength diffraction grating or bulky high‐index prism, required excite these nonradiative modes, which is not cost‐effective and thus suitable for point‐of‐care applications. Here, a scalable HMM‐based sensor platform proposed experimentally demonstrated, the Brewster mode of HMM from free‐space. The excitation modes shown...

This paper presents a novel hydrostatic pressure sensor using high birefringence photonic crystal fibers (PCFs), featuring an enhanced sensitivity with wide range of detection along the length fiber. The proposed PCFs exhibit higher order as ~10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> , which is achieved by introduction two elliptical hollow channels stressed at major axis in cladding region. consequence these air holes...

This work reports the development of an ultra-high capacity Nyquist-wavelength division multiplexing (WDM) superchannel based free space optics (FSO) transmission link. In proposed link, 32 independent wavelength channels are multiplexed, each carrying 200 Gbps dual polarization-quadrature phase shift keying (DP-QPSK) data with 60 GHz channel spacing yield net rate 6.4 Tbps spectral efficiency 3.33 bits/s/Hz. The performance FSO link has been numerically investigated under influence dynamic...

A reconfigurable biosensor with different spectral sensitivities could provide new opportunities to increase the label-free selectivity and sensitivity for biomolecules. Here, we propose numerically demonstrate a phase change chalcogenide material (Ge <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Sb Te xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> )-based photonic crystal fiber (PCF) sensor tunable enhanced refractive index...

The detection of pseudomonas bacteria is crucial for multiple reasons, given its substantial impact on the environment, plants, agrifoods, and human health. This article presents improvement in performance a sophisticated surface plasmon resonance technique-based sensor detecting bacteria. proposed structure utilizes three bacterial attachments, namely, toluene, nicotine, poly (trifluoroethyl methacrylate), as affinity layers. Kretschmann design includes silver, silicon, titanate material,...

We consider the nonlinear Schrödinger–Maxwell–Bloch (NLS–MB) equation with variable coefficients. construct Lax pair for NLS–MB system through AKNS formalism. derived two-soliton solution using Darboux transformation. Finally we demonstrate tunneling of two solitons dispersion and barrier or well. Our result shows that can be compressed well exponential decay special choice

The reliability and efficiency of free space optics (FSO) systems is significantly degraded by attenuation caused different climate conditions atmospheric turbulence. In this work, an FSO transmission system with high-speed capability proposed deploying orthogonal frequency division multiplexing (OFDM) to mitigate channel fading effects. Further, we propose the hybridization polarization (PDM) CO-OFDM improve capacity. We perform bit error rate (BER) optical signal noise ratio (OSNR)...

In this paper, a generalized nonlinear Schrödinger–Maxwell–Bloch model with variable dispersion and nonlinearity management functions, which describes the propagation of optical pulses in an inhomogeneous erbium-doped fiber system under certain restrictive conditions, is investigation. We derive Lax pair spectral parameter exact soliton solution generated from Bäcklund transformation. It observed that stable solitons are possible only very condition for other functions. For various forms...

In this paper, we introduce a system of the nonlinear Schrödinger-Maxwell-Bloch equation with variable coefficients which represents propagation optical pulses in an inhomogeneous erbium doped fiber loss/gain driven by external potential. The one and two soliton solutions explicit forms are generated using Darboux transformation associated Lax pair. We consider distributed amplification system, some main features demonstrated graphically. also concept dispersion managed through symbolic...

Abstract This research focuses on the side-polished Single-Mode Optical Fibers (SMOF) as refractive index (RI) sensor utilizing properties of Surface Plasmon Resonance. The SMOF with cladding stripped off shows a D-shaped optical fiber high sensitivity functionalization. Here we show silver protected by graphene oxide (GO) viable candidates. A few layers GO top thin layer were applied material to overcome coating degradation process. silver/GO was characterized using various RIs analyte...

Through theoretical approach, two soliton solutions for nonautonomous inhomogeneous nonlinear Schrödinger - Maxwell Bloch (INLS-MB) equation is attained with the aid of Darboux transformation technique. Based on obtained solutions, bird and butterfly like wave pattern are specific choice coefficients. Especially, by means dispersion management scheme, exponential profile adopted coefficient in governing solutions. Also, through appropriate choices control parameters function, transition from...