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Updated: Jul 31, 2025

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Compact silicon nitride interferometers.

Fahimeh Armin, Cedrik Coia, Frederic Nabki

|May 9, 2023

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We developed a compact silicon nitride interferometer with equal length waveguides for reduced losses and a smaller footprint. This design allows for higher integration density and tunable spectral responses using thermal effects.

Area of Science:

Photonics and optical engineering
Integrated optics
Silicon nitride photonics

Background:

Traditional interferometers often require complex waveguide designs with different lengths and bends, leading to increased losses and larger device footprints.
Achieving high integration densities in photonic circuits is crucial for advanced optical systems.
Controlling spectral response and compensating for fabrication variations are key challenges in integrated photonics.

Purpose of the Study:

To demonstrate a novel compact silicon nitride interferometer design.
To reduce optical losses and device footprint through innovative waveguide structuring.
To investigate the thermal tunability of the interferometer and its potential for fabrication error compensation.

Main Methods:

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Related Experiment Videos

Last Updated: Jul 31, 2025

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Fabrication of a silicon nitride interferometer utilizing waveguides of equal length but differing effective indices.

Integration of a simple aluminum heater for inducing thermo-optical effects.

Characterization of the interferometer's spectral response and tunability.

Main Results:

The proposed design eliminates the need for waveguide bends, significantly reducing optical losses.
The interferometer achieves an order of magnitude smaller footprint compared to conventional designs, enabling higher integration densities.
Demonstrated effective thermal tuning to compensate for fabrication variations, stabilizing the spectral response.

Conclusions:

The developed compact silicon nitride interferometer offers a significant advancement in integrated photonics.
The design's reduced footprint, lower losses, and tunability make it suitable for high-density photonic integrated circuits.
The thermo-optical tuning mechanism provides a practical solution for managing fabrication tolerances and ensuring device performance.