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A Silicon Optical Transistor.

Leo T Varghese1, Li Fan1, Jian Wang1

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

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|January 31, 2017
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Summary
This summary is machine-generated.

We developed an all-optical transistor using microring resonators. This compact, CMOS-compatible device achieves high output/input and ON/OFF ratios for optical signal modulation.

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Area of Science:

  • Photonics
  • Optoelectronics
  • Integrated Optics

Background:

  • Optical transistors are crucial for high-speed optical signal processing.
  • Existing optical switching technologies face challenges in compactness and energy efficiency.
  • Complementary metal-oxide-semiconductor (CMOS) compatibility is essential for scalable photonic integrated circuits.

Purpose of the Study:

  • To demonstrate a novel all-optical transistor.
  • To achieve high performance metrics including output/input and ON/OFF ratios.
  • To ensure the device is ultra-compact and compatible with existing CMOS fabrication processes.

Main Methods:

  • Utilized microring resonators for device fabrication.
  • Implemented an all-optical modulation scheme.
  • Characterized the device performance, focusing on signal ratios.

Main Results:

  • Achieved an all-optical transistor with a modulated output signal.
  • Demonstrated an output/input ratio exceeding 3 dB.
  • Obtained an ON/OFF ratio greater than 20 dB.

Conclusions:

  • The microring-based all-optical transistor is ultra-compact.
  • The device exhibits excellent signal modulation capabilities.
  • The CMOS compatibility of the device paves the way for integrated photonic circuits.