Researchers at the University of Illinois at Urbana-Champaign (Champaign, IL) have constructed a light-emitting transistor that has set a new record with a signal-processing modulation speed of 4.3 gigahertz (GHz). By internally connecting the base and collector of this light-emitting transistor, they created a new form of light-emitting diode (LED) that modulates at up to 7 gigahertz, breaking a previously announced record of 3.6 GHz for a plasmonic LED.
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