High-speed modulation of a terahertz quantum cascade laser by coherent acoustic phonon pulses

HIGHLIGHTS

• who: Aniela Dunn from the SchoolUniversity of Leeds, Leeds , JT, UK have published the paper: High-speed modulation of a terahertz quantum cascade laser by coherent acoustic phonon pulses, in the Journal: NATURE COMMUNICATIONS NATURE COMMUNICATIONS
• what: The authors demonstrate a previously unexplored approach to modulation of a QCL, through ultrafast acoustic modulation of the electronic states and carrier transport.

SUMMARY

Direct laser photoexcitation of carriers in the QCL also allows modulation of the free-carrier absorption and hence THz power23, although the bandwidth is limited by carrier recombination (~700 ns . . .

 



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