JNCASR silicon chip carries terahertz signals past a barrier at 100 Gbit/s, a step towards 6G

4 November 2026

Researchers at the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru, have built a silicon chip for terahertz signals.
JNCASR is an autonomous institute of the Department of Science and Technology (DST).
Terahertz waves lie between microwaves and infrared light and are expected to carry future 6G networks.
Using topological photonics, the team patterned triangular holes in silicon in a honeycomb, graphene-like layout.
The signal crossed an engineered barrier with only about 1–2% loss — an effect called photonic Klein tunnelling.
A power-splitter device carried data at 100 Gbit/s, and tests across 310–360 GHz matched simulations.