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Updated: Jul 3, 2025

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

150 Gbps THz Chipscale Topological Photonic Diplexer.

Manoj Gupta^1,2, Abhishek Kumar^1,2, Prakash Pitchappa³

¹Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.

Advanced Materials (Deerfield Beach, Fla.)

|February 13, 2024

Summary

This summary is machine-generated.

This study introduces a silicon topological diplexer for on-chip communication. It enables two high-speed terahertz channels using topological edge modes, achieving 150 Gbit/s capacity with minimal interference.

Keywords:

Silicon photonics demultiplexer multiplexer photonic filter terahertz 6G to XG wireless communications terahertz interconnects terahertz topological photonic integrated circuits topological waveguides

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Area of Science:

Photonics
Quantum Physics
Electrical Engineering

Background:

Photonic diplexers are crucial for high-speed on-chip communication.
Efficiently dividing the spectrum into non-overlapping sub-bands for frequency-selective channels remains a challenge.

Purpose of the Study:

To report an on-chip topological diplexer for terahertz frequency band filtering.
To demonstrate high-speed data transfer using topological edge modes and Klein tunneling.

Main Methods:

Fabrication of a silicon topological diplexer chip.
Utilizing Klein tunneling of topological edge modes for frequency filtering.
Implementing quadrature amplitude modulation (QAM) for data transmission.

Main Results:

Achieved two high-speed channels, each with 12.5 GHz bandwidth, at 305 and 321.6 GHz carrier frequencies.
Demonstrated a combined diplexer capacity of 150 Gbit/s.
Successfully suppressed interference between adjacent channels using a guard band.

Conclusions:

Topologically protected edge modes effectively mitigate frequency-selective fading for broadband signals.
The developed topological diplexer shows significant promise for integrated photonic applications in terahertz and telecommunications.
Potential applications include lossless topological multiplexers, interconnects, antennas, and modulators for future wireless generations (6G and beyond).