High sensitivity lossy mode resonance sensors

Lossy Mode Resonance (LMR) Based Fiber Optic Sensors: A Review

“…1 is the most famous configuration till date for the coupling of light to the surface plasmon modes through ATR, resulting to the phenomenon of SPR. Similar to the SPR phenomenon, a substrate coated with metal oxides, such as indium tin oxide (ITO) [5], [16], [17], titanium dioxide (TiO 2 ) [18], indium oxide (In 2 O 3 ) [19] or polymers [16], [20] in contact with other dielectric media of higher RI support many number of modes called lossy modes or long range guided modes leading to the phenomenon of LMR. These lossy modes are guided in the thin film and can be generated with both TE and TM polarized light.…”

Analysis of Silicon Clad Optical Waveguide for High Extinction Ratio TE/TM Pass Polarizers using Resonant Coupling between Guided Modes and Lossy Modes

“…Multilayer waveguides are used in the implementation of variety of optical devices including modulators, waveguide polarizers, semiconductor lasers, Bragg reflectors, directional couplers and sensors [1][2][3][4][5][6][7]. Polarizer is an important component in optical communication and sensor systems [2,3].…”

“…Polarizer is an important component in optical communication and sensor systems [2,3]. For selecting a particular polarization, different polarizers utilize different techniques like birefringence, resonant mode coupling and different TE/TM level of absorption in multilayer waveguides [5].…”

Optical fiber pH sensor based on gold nanoparticles into polymeric coatings

“…Additionally, the use of nanocoatings combined with optical fiber can enhance the sensing properties and allow novel functionalities [4][5][6]. Many different optical fiber sensing structures based on nanostructured films such as long period gratings (LPGs) [7], interferometric cavities [8], fiber Bragg gratings (FBGs) [9,10], resonance-based sensors [11][12][13][14] or fluorescence-based sensors [15][16][17] have been developed recently, but those that use spectral techniques have shown a better performance because their measurements are more reliable and highly independent from optical power fluctuations. In this document, an optical fiber pH sensor based on the simultaneous generation of two different electromagnetic effects, lossy mode resonance (LMR) and localized surface plasmon resonance (LSPR), is presented.…”

“…When a change in the external medium pH is produced, the thickness and the effective refractive index of the deposited polymeric coating varies. This variation is known as swelling-deswelling effect [14]. As the spectral position of the LMR and LSPR absorption peaks strongly depends on this parameter, a change in the external pH results in a shift of the resonant absorption peaks that can be easily measured using a transmission setup.…”