Indium phosphide (InP) and other compound semiconductors are taking on a bigger role as demand rises for highly efficient light emission and ultra-high-frequency transmission. Their lower electron scattering and lower loss characteristics position them to help break through AI's energy and bandwidth barriers.

As the US and China continue to clash over geopolitics and critical materials supply, industry sources say China's restrictions on indium phosphide (InP) substrates for optical communications remain unchanged and are widely seen as part of Beijing's effort to counter US-led AI development.

As AI data centers demand ever-faster networking speeds and more advanced optical interconnects, one of the semiconductor industry's lesser-known materials is emerging as a major constraint.

Export controls on indium phosphide (InP) risk prolonging supply strains in the compound semiconductor market, GCS Holdings warned, affecting optical and RF component makers worldwide. The company said it has secured capacity and diversified sourcing ahead of the second half of 2026, signaling potential relief from first-half 2026 constraints for global customers and partners.