Strong quantum-confined Stark effect in germanium quantum-well structures on silicon

Strong quantum-confined Stark effect in germanium quantum-well structures on silicon

Silicon chips dominate electronics while optical fibres dominate long-distance information transfer. Recent work, in search of the best of both worlds, has led to silicon devices capable of modulating light; these show promise but still rely on weak physical mechanisms found in silicon itself. Now a team working at Stanford University and at Hewlett-Packard's Palo Alto labs has developed thin germanium ‘quantum well’ nanostructures grown on sili…

Ultrafast Optical Switching In Germanium: A Breakthrough For Multicolored Applications In Telecommunications And Computing

Germanium achieves ultrafast multicolored transparency switching with a single laser pulse, offering potential for faster telecommunications and optical computing.

Ultrafast Multivalley Optical Switching in Germanium for High-Speed Computing and Communications

Multicolored optical switching is essential for potential advancements in telecommunication and optical computing. However, most materials typically exhibit only single-colored optical nonlinearity under intense laser illumination. To address this, researchers have demonstrated that exciting the multivalley semiconductor germanium with a single-color pulse laser enables ultrafast transparency switching across multiple wavelengths. This breakthro…

Multicolored switching opens up optical computing

Multicolored optical switching is an important phenomenon with potential applications in fields such as telecommunications and optical computing From the Wasedi University report: Opaque materials can transmit light when excited by a high-intensity laser beam. This process, known as optical bleaching, induces a nonlinear effect that temporarily alters the properties of a material. Remarkably, when […] The post Multicolored switching opens up opt…

Ultrafast Multivalley Optical Switching in Germanium Advances High-Speed

In a groundbreaking advancement poised to revolutionize optical communication and computing, researchers have demonstrated ultrafast multivalley optical switching in germanium (Ge) using a single-color pulsed laser. This innovative approach enables precise and dynamic control over material transparency across multiple wavelengths simultaneously, a feat previously unattainable due to inherent limitations in conventional optical switching material…