External modulators for TeraHertz Quantum Cascade Lasers based on electrically-driven active metamaterials

External modulators for TeraHertz Quantum Cascade Lasers based on electrically-driven active metamaterials

We have designed, fabricated and measured electrically-driven active metamaterials which operate as external modulators for TeraHertz Quantum Cascade Lasers. The modulation is achieved by applying a voltage to the metamaterial layer which actively displaces carriers from the n-doped layer causing ch...

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Veröffentlicht in:Metamaterials 2010-08, Vol.4 (2), p.83-88
Hauptverfasser: Peralta, X.G., Brener, I., Padilla, W.J., Young, E.W., Hoffman, A.J., Cich, M.J., Averitt, R.D., Wanke, M.C., Wright, J.B., Chen, H.-T., O’Hara, J.F., Taylor, A.J., Waldman, J., Goodhue, W.D., Li, J., Reno, J.
Format: Artikel
Sprache:eng
Schlagworte:
Carriers
Damping
Displacement
Electric potential
Metamaterials
Modulation
Modulators
Quantum Cascade Lasers
TeraHertz
Voltage
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Zusammenfassung:We have designed, fabricated and measured electrically-driven active metamaterials which operate as external modulators for TeraHertz Quantum Cascade Lasers. The modulation is achieved by applying a voltage to the metamaterial layer which actively displaces carriers from the n-doped layer causing changes in damping and frequency location of the lowest metamaterial response. We demonstrate their operation at 2.4 and 2.8 TeraHertz and obtain a maximum modulation depth of ∼60% with a large degree of modulation linearity.
ISSN:1873-1988
1878-0288
DOI:10.1016/j.metmat.2010.04.005