Photonic and Thermal Modelling of Microrings in Silicon, Diamond and GaN for Temperature Sensing

At a Glance

Metadata	Details
Publication Date	2020-05-12
Journal	Nanomaterials
Authors	Lukas Weituschat, Walter Dickmann, J. Guimbao, Daniel Ramos, Stefanie Kroker
Institutions	Universidad Autónoma de Madrid, Physikalisch-Technische Bundesanstalt
Citations	25
Analysis	Full AI Review Included

ERROR: File too large (15.3MB)

View Original Abstract

Staying in control of delicate processes in the evermore emerging field of micro, nano and quantum-technologies requires suitable devices to measure temperature and temperature flows with high thermal and spatial resolution. In this work, we design optical microring resonators (ORRs) made of different materials (silicon, diamond and gallium nitride) and simulate their temperature behavior using several finite-element methods. We predict the resonance frequencies of the designed devices and their temperature-induced shift (16.8 pm K−1 for diamond, 68.2 pm K−1 for silicon and 30.4 pm K−1 for GaN). In addition, the influence of two-photon-absorption (TPA) and the associated self-heating on the accuracy of the temperature measurement is analysed. The results show that owing to the absence of intrinsic TPA-processes self-heating at resonance is less critical in diamond and GaN than in silicon, with the threshold intensity I th = α / β , α and β being the linear and quadratic absorption coefficients, respectively.

Tech Support

Original Source

DOI: https://doi.org/10.3390/nano10050934

References

2012 - Thermometry at the nanoscale [Crossref]
2018 - Towards replacing resistance thermometry with photonic thermometry [Crossref]
2010 - Silicon photonic temperature sensor employing a ring resonator manufactured using a standard CMOS process [Crossref]
2014 - Ultra-sensitive chip-based photonic temperature sensor using ring resonator structures [Crossref]
2004 - Ultrahigh-quality-factor silicon-on-insulator microring resonator [Crossref]