A high-sensitivity temperature sensor based on the enhanced Goos-Hanchen effect in a symmetrical metal-cladding waveguide is theoretically proposed and experimentally demonstrated. Owing to the high sensitivity of the ultrahigh-order modes, any minute variation of the refractive index and thickness in the guiding layer induced by the thermo-optic and thermal expansion effects will easily give rise to a dramatic change in the position of the reflected light. In our experiment, a series of Goos-Hanchen shifts are measured at temperatures varying from 50.0 °C to 51.2 °C with a step of 0.2 °C. The sensor exhibits a good linearity and a high resolution of approximately 5×10(-3) °C. Moreover, there is no need to employ any complicated optical equipment and servo techniques, since our transduction scheme is irrelevant to the light source fluctuation.

High-sensitivity temperature sensor using the ultrahigh order mode-enhanced Goos-Hänchen effect

A nanometeric temperature sensor based on plasmonic waveguide with an ethanol-sealed rectangular cavity

Instrumental performance and sensitivity of surface plasmon polariton or resonance (SPR) sensors are crucially affected by ambient temperature fluctuations. Apart from temperature-induced opto-mechanical displacements, resonance conditions and associated output quantities vary, due to thermo-physical properties of optical components, like prism, semi-transparent metal-film and aqueous analyte solution. The variation of instrumental sensitivity S as function of environmental temperature has been exploited experimentally in the temperature region 275 K T 320 K . A compact, robust commercial SPR device has been used, operating in the angular interrogation mode. At temperature 300  K, S θ steadily deteriorates from 120 ° /RIU to 30 ° /RIU. For comparison, the thermal device characteristics also has been evaluated theoretically within the range 273 K T 370 K for both, angular interrogation mode (AIM) and wavelength interrogation mode (WIM). Fresnel’s equation system and established analytical sensitivity expressions have been elaborated, and differences assigned to simplifications in the analytical form. An appropriate thermo-physical data set of experimentally verified optical materials parameters n ( λ , T ) and ɛ ( λ , T ) for all, BK7 glass prism, gold metal film, and aqueous analyte has been used. A singularity has been identified in the simulations near the freezing point of water, while a soft transition appears in the experiment. Towards higher device temperatures at 300 K T 370 K, S θ , λ decreases weakly. The effect is more pronounced at shorter wavelength ≤ 550 nm, and in the wavelength interrogation mode. A steady increase towards higher T was observed for the SPR-line broadening parameter in the AIM, but a distinct maximum resolved at 305 K for wavelength interrogation.

Temperature-dependent sensitivity of surface plasmon resonance sensors at the gold–water interface

The possibility of constructing an optical sensor for temperature monitoring based on the Goos-Hanchen (GH) effect is explored using a theoretical model. This model considers the lateral shift of the incident beam upon reflection from a metal-dielectric interface, with the shift becoming a function of temperature due mainly to the temperature dependence of the optical properties of the metal. It is found that such a sensor can be most effective by using long wavelength p-polarized incident light at almost grazing incidence onto the metal, where significant variation of negative GH shifts can be observed as a function of the temperature.

/pdf/optical-temperature-sensing-based-on-the-goos-hanchen-effect-2d3i4mgm5y.pdf

Optical temperature sensing based on the Goos-Hänchen effect

Effects of temperature on the surface plasmon resonance at a metal–semiconductor interface

http://web.pdx.edu/%7Ehopl/Opt_Comm_2004.pdf

S.U. Jen

Papers

Surface plasmon resonance monitoring of temperature via phase measurement