CMOS-compatible athermal silicon microring resonators.

Area of Science:

• Photonics
• Materials Science
• Optical Engineering

Background:

• Resonant silicon optical devices are crucial for integrated photonics.
• Temperature fluctuations can significantly degrade the performance of these devices.
• Existing temperature compensation methods often require active control, increasing complexity and power consumption.

Purpose of the Study:

• To propose and demonstrate a novel class of passively temperature-compensated resonant silicon optical devices.
• To achieve stable operation of silicon photonic devices over a wide temperature range.
• To provide a fundamental principle for enhancing the thermal stability of various resonant photonic devices.

Main Methods:

• Designing a device combining a ring resonator with a Mach-Zehnder interferometer.
• Passively compensating for temperature variations by precisely controlling optical mode confinement in waveguides.
• Testing device performance across an 80-degree temperature range.

Main Results:

• Successful demonstration of a resonant silicon optical device with passive temperature compensation.
• Stable device operation verified over a wide temperature range (80 degrees).
• The proposed method effectively mitigates thermal drift issues.

Conclusions:

• The developed resonant silicon optical device offers robust performance independent of temperature fluctuations.
• The passive temperature compensation strategy is effective and applicable to a broad range of silicon photonic devices.
• This work paves the way for more reliable and efficient integrated photonic systems.