Compact on-Chip Temperature Sensors Based on Dielectric-Loaded Plasmonic Waveguide-Ring Resonators

Abstract

The application of a waveguide-ring resonator based on dielectric-loaded surface plasmon-polariton waveguides as a temperature sensor is demonstrated in this paper and the influence of temperature change to the transmission through the waveguide-ring resonator system is comprehensively analyzed. The results show that the roundtrip phase change in the ring resonator due to the temperature change is the major reason for the transmission variation. The performance of the temperature sensor is also discussed and it is shown that for a waveguide-ring resonator with the resonator radius around 5 μm and waveguide-ring gap of 500 nm which gives a footprint around 140 μm2, the temperature sensitivity at the order of 10−2 K can be achieved with the input power of 100 μW within the measurement sensitivity limit of a practical optical detector.

High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities

“…Plasmonics have attracted considerable research interest because of their special capability to confine light to subwavelength dimensions and overcome the traditional optical diffraction limit [1,2,3,4,5,6,7]. As we know, there has been remarkable progress in developing plasmonic nanostructures, such as surface-enhanced Raman spectroscopy [8], bio/chemical sensors [9,10,11,12], optical waveguides [13,14], lasers [15], absorbers [16], reflectors [17,18], and logic devices [19,20].…”

Active Nanophotonic Circuitry Based on Dielectric‐loaded Plasmonic Waveguides

“…Looking from another prospective, this means that the WRR transmission is sensitive to the ambient temperature, leading to the idea of a WRR-based temperature sensor. [ 197,198 ] The temperature variations of about ≈1 °C were monitored with the estimation of a minimal detectable level…”

Explorative technology transfer in photonics

“…Here a Laser LED couples light into the straight bus waveguide with the width, w = 500 nm, height t = 550 nm deposited on 60 nm gold film and pass a ring with the radius of approximately R = 5 μm and a gap G = 0,5 μm. The sensing area is compact and gives a footprint around 140 μm 2 [6]. …”