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Area of Science:

  • Photonics
  • Materials Science
  • Electrical Engineering

Background:

  • Electro-optic modulators are vital for telecommunications and microwave-photonic systems.
  • Existing chip-scale modulators struggle to meet requirements for CMOS compatibility, high bandwidth, and low loss.
  • Lithium niobate modulators offer superior electro-optic properties but are difficult to integrate on-chip.

Purpose of the Study:

  • To develop monolithically integrated lithium niobate electro-optic modulators.
  • To achieve CMOS-compatible drive voltages, ultra-high bandwidths, and very low optical losses simultaneously.
  • To enable cost-effective, low-power, and ultra-high-speed solutions for advanced photonic applications.

Main Methods:

  • Engineering microwave and photonic circuits for high electro-optical efficiency.
  • Achieving simultaneous group-velocity matching and ultra-low optical losses.
  • Demonstrating monolithic integration of lithium niobate on-chip.

Main Results:

  • Demonstrated chip-scale lithium niobate electro-optic modulators.
  • Achieved CMOS-compatible drive voltages.
  • Supported data rates up to 210 gigabits per second.
  • Exhibited on-chip optical loss of less than 0.5 decibels.

Conclusions:

  • The developed modulators overcome limitations of existing integrated platforms.
  • Scalable modulator devices offer promising solutions for next-generation optical networks and microwave photonics.
  • The approach enables large-scale, ultra-low-loss photonic circuits for quantum and classical applications.