Surface Plasmon Resonance Based Temperature Sensors in Liquid Environment

Abstract

The aim of this work is to measure the temperature variations by analyzing the plasmon signature on a metallic surface that is periodically structured and immersed in a liquid. A change in the temperature of the sample surface induces a modification of the local refractive index leading to a shift of the surface plasmon resonance (SPR) frequency due to the strong interaction between the evanescent electric field and the metallic surface. The experimental set-up used in this study to detect the refractive index changes is based on a metallic grating permitting a direct excitation of a plasmon wave, leading to a high sensibility, high-temperature range and contactless sensor within a very compact and simple device. The experimental set-up demonstrated that SPR could be used as a non-invasive, high-resolution temperature measurement method for metallic surfaces.

Ultra-Narrow SPP Generation from Ag Grating

“…In this context, plasmonics in the mid-infrared (MIR) region and their usage for sensor applications have emerged as a field of interest in the recent years [1]. These surface effects allow monitoring different physical or chemical properties at material interfaces in a non-invasive way [2][3][4][5] or even several physical properties at once [6,7]. Besides such sensing applications, the list of use-cases in the field of plasmonic research in the mid-and near-infrared region also covers waveguides [8], selective thermal emitters [9,10] and infrared (IR) detectors [11].…”

IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes

“…In spite of the fact that it is difficult and still challenging to fabricate metal gratings of high quality and low cost and despite the lower RI sensitivity, which is <1000 nm per refractive index unit (RIU) [ 16 ], the grating-based coupling systems are very promising in integrated sensing devices [ 18 ]. The SPR grating structures are fabricated by various techniques, such as a laser interference lithography [ 20 , 21 ], nanoimprint lithography [ 22 ], electron beam (e-beam) lithography [ 23 , 24 ] and focused ion beam (FIB) [ 25 ], then often followed by etching methods. Many of these fabrication methods of gratings consist of several steps, which leads to a longer time required to structure fabrication.…”

“…For this reason, many research groups used optical discs as structural template for fabrication of metallic gratings [ 26 , 28 , 32 , 33 , 34 ]. The grating-coupled SPR sensors were used as temperature sensors [ 21 ], RI sensors [ 24 , 25 , 33 , 35 ] and as biosensors [ 10 , 18 , 19 , 32 , 36 , 37 , 38 , 39 , 40 ]. Gold-coated polymer gratings brought an efficient way for fabrication of SPR gratings instead of using thick metal layers [ 29 , 30 , 35 , 41 , 42 , 43 ].…”

Theoretical Study of the Impact of Vacancies and Disorder on the Electronic Properties of Cu2–xSe

“…19,20,22,23,26,36−39 In addition, the LSPR is known to be influenced by the NP size, 40,41 surrounding medium such as solvent and surface ligands, 26,42 and environment temperature. 43 The Cu atoms in the cubic phase of Cu 2−x Se are known to be partially disordered 44,45 and have been characterized as superionic due to high Cu mobility. 27,46−49 However, to the best of our knowledge, the effect of Cu disorder on the optical properties of Cu 2−x Se has not been quantified, either from experiments or from theory.…”