New Ultrafast Optical Probe
A new ultrafast optical probe could pave the way for petahertz electronics.
The Bandgap Property
The bandgap is a critical property of solid materials, determining whether a material is an insulator, conductor, or semiconductor, and governing its interaction with light and electricity.
The bandgap is the energy difference between the highest occupied electronic state (valence band) and the lowest empty state (conduction band).
Ultrafast Changes
When a material is hit with intense light, its bandgap can temporarily shrink or expand, with these changes occurring on ultrafast timescales of femtoseconds (millionths of a billionth of a second).
Tracking these changes has long been a challenge due to their extremely small timescales.
The bandgap determines whether a material is an insulator, a conductor, or a semiconductor, and it governs how the material interacts with light and electricity.
Author's summary: New optical probe enables petahertz electronics research.
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