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Continuous wave terahertz radiation from an InAs/GaAs quantum-dot photomixer device
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10.1063/1.4747724
/content/aip/journal/apl/101/8/10.1063/1.4747724
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/8/10.1063/1.4747724
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental setup and (inset) LD pump wavelength ranges with LD temperature variation. ASL—aspheric lenses; BS—beamsplitter cube; and PCA—photoconductive antenna.

Image of FIG. 2.
FIG. 2.

Typical CW THz output power trends from a QD photomixer test device. (a) Monitored as the optical pump power is held constant and the PCA bias and accelerating E-field is increased; (b) as the PCA bias is held constant and the optical pump power is increased.

Image of FIG. 3.
FIG. 3.

Example THz output power trend observed as the structure is optically pumped by a Ti:Sapphire laser, operating at 780 nm with a pulsewidth of 150fs. Initially, the square-law dependence of output power on optical pump power is observed, then the structure begins to exhibit THz output saturation characteristics.

Image of FIG. 4.
FIG. 4.

PL spectrum from the QD-based structure showing the distinct ground state, excited state, and second-excited state PL peaks at around 1256 nm, 1189 nm, and 1111 nm, respectively.

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/content/aip/journal/apl/101/8/10.1063/1.4747724
2012-08-23
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Continuous wave terahertz radiation from an InAs/GaAs quantum-dot photomixer device
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/8/10.1063/1.4747724
10.1063/1.4747724
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