（テラヘルツ関連）アメリカ・カリフォルニア大学ロサンゼルス校／UCLA engineers shrink powerful terahertz systems onto a single semiconductor chip

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Approach could advance ultrafast wireless communication,
imaging and remote sensing

Key takeaways

• Terahertz waves have major potential in high-speed communication, imaging, security screening and sensing, but are still underused due to complex and bulky systems.
• UCLA researchers integrated laboratory-sized terahertz systems onto one semiconductor chip, opening the door to compact, scalable devices. 
• The breakthrough focused on quantum well semiconductor structures — ultrathin layers engineered to control light — that can generate, detect, modulate and amplify terahertz signals on a single chip.

High-frequency waves classified as terahertz occupy a relatively underused region of the electromagnetic spectrum between infrared light and microwaves. Researchers have long recognized its unique potential for applications including ultrafast wireless communication, security screening, remote sensing and medical imaging.