THz Superradiance from a GaAs: ErAs Quantum Dot Array at Room Temperature
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We report that an ErAs quantum-dot array in a GaAs matrix under 1550 nm pulsed excitation produces cooperative spontaneous emission—Dicke superradiance—in the terahertz frequency region at room temperature. Two key points pertain to the experimental evidence: (i) the pulsed THz emission power is much greater than the continuous wave (CW) photomixing power; and (ii) the ultrafast time-domain waveform displays ringing cycles. A record of ~117 μW pulsed THz power was obtained, with a 1550 nm-to-THz power conversion efficiency of ~0.2%.
2000 ◽
Vol 39
(Part 1, No. 7A)
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pp. 3860-3862
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2005 ◽
Vol 17
(6)
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pp. 1139-1141
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