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Characterization of Anisotropic Leaky Mode Modulators for Holovideo

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Published on: March 19, 2016

Integrated ultra-high-performance graphene optical modulator.

Elham Heidari¹, Hamed Dalir², Farzad Mokhtari Koushyar¹

¹Microelectronics Research Center, Electrical and Computer Engineering Department, University of Texas at Austin, Austin, TX 78758, USA.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

This summary is machine-generated.

Researchers developed a compact, energy-efficient graphene electro-optic modulator on silicon photonics. This device achieves 60 GHz speed, paving the way for high-density, high-performance photonic integrated circuits.

Keywords:

2D material ASIC graphene optical modulator photonics integrated circuits

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Area of Science:

Photonics
Materials Science
Electrical Engineering

Background:

Optoelectronic devices face challenges balancing high speed with energy efficiency for data processing.
Existing heterogeneous material integration in photonics offers speed but lacks compactness.
A need exists for compact, high-speed, and energy-efficient electro-optic modulators for on-chip integration.

Purpose of the Study:

To develop a high-speed, energy-efficient, and compact electro-optic modulator.
To integrate a double-layer graphene modulator onto a silicon photonics platform.
To enhance electro-optic modulation using a vertical distributed-Bragg-reflector cavity.

Main Methods:

Integration of a double-layer graphene optical modulator on a silicon photonics platform.
Utilizing a vertical distributed-Bragg-reflector cavity to enhance electro-optic response.
Characterization of modulation speed, compactness, and energy efficiency.

Main Results:

Achieved 60 GHz speed (3 dB roll-off).
Demonstrated micrometer-scale compactness.
Reached an energy efficiency of 2.25 fJ/bit.
Reduced driving voltage by approximately 40 times using the DBR cavity.
Maintained a modulation depth of 5.2 dB/V.

Conclusions:

The developed graphene electro-optic modulator offers a significant advancement in speed, efficiency, and size.
This technology enables high photonic chip density and performance for advanced applications.
Potential applications include signal processing, sensor platforms, and analog/neuromorphic photonic processors.