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Related Experiment Video

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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40 dB Optical Nonreciprocal Transmission on a Silicon Chip.

Li Fan1, Jian Wang1, Leo T Varghese1

  • 1School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47906.

Frontiers in Optics. Annual Meeting of the Optical Society of America
|January 27, 2017
PubMed
Summary

Researchers created a silicon optical diode for telecommunication wavelengths, achieving 40 dB nonreciprocal transmission. This represents the highest ratio for CMOS-compatible silicon photonics to date.

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Area of Science:

  • Photonics and Materials Science
  • Integrated Optics
  • Semiconductor Devices

Background:

  • Nonreciprocal devices are crucial for optical communication systems, preventing signal feedback.
  • Existing optical isolators are often bulky, expensive, or incompatible with integrated photonic circuits.
  • Silicon photonics offers a promising platform for miniaturized and cost-effective optical components.

Purpose of the Study:

  • To demonstrate a high-performance, on-chip optical diode using all-silicon technology.
  • To achieve unprecedented levels of nonreciprocal transmission in a CMOS-compatible platform.
  • To advance the integration of nonreciprocal functionalities into silicon photonic integrated circuits.

Main Methods:

  • Fabrication of an all-silicon optical diode using standard CMOS processes.
  • Characterization of the device's transmission properties at telecommunication wavelengths.
  • Measurement of the nonreciprocal transmission ratio (forward vs. backward transmission).

Main Results:

  • Achieved 40 dB of nonreciprocal transmission, a record for silicon photonics.
  • Demonstrated high performance using a compact, integrated all-silicon device.
  • Confirmed compatibility with Complementary Metal-Oxide-Semiconductor (CMOS) fabrication processes.

Conclusions:

  • The demonstrated silicon optical diode offers a significant advancement in integrated nonreciprocal devices.
  • This technology paves the way for miniaturized optical isolators and circulators on a chip.
  • The high nonreciprocal transmission ratio in a CMOS-compatible platform enables scalable photonic integrated circuits.