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Surface-emitting terahertz quantum cascade laser source based on intracavity difference-frequency generation
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10.1063/1.3009198
/content/aip/journal/apl/93/16/10.1063/1.3009198
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/16/10.1063/1.3009198
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Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic drawing of the ridge waveguide structure with the gold grating on top. (b) The mode profiles for the terahertz wave generated via DFG and the two mid-IR pumps ( and ). The mode profiles were calculated for the waveguide without grating that consists of a 400 nm thick layer of gold, a 200 nm thick InP plasmon layer ( doped ), a thick InP cladding layer ( doped ), a thick active region, and an InP substrate ( doped ). The position of the active region and depth of the grating grooves are indicated in gray. The grating is etched through the top plasmon layer and 100 nm into the lower doped top InP cladding layer.

Image of FIG. 2.
FIG. 2.

(a) The mid-IR emission spectrum collected from the edge of a typical device operated in pulsed mode at 80 K. (b) The terahertz emission spectrum from the surface of the device in (a).

Image of FIG. 3.
FIG. 3.

The characteristics of the device of Fig. 2 for (a) the terahertz signal and (b) the two mid-IR pump beams measured in pulsed mode at 80 K.

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/content/aip/journal/apl/93/16/10.1063/1.3009198
2008-10-24
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Surface-emitting terahertz quantum cascade laser source based on intracavity difference-frequency generation
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/16/10.1063/1.3009198
10.1063/1.3009198
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