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Improved sensitivity of terahertz detection by GaAs photoconductive antennas excited at 1560 nm
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10.1063/1.3519480
/content/aip/journal/apl/97/20/10.1063/1.3519480
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/20/10.1063/1.3519480
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic illustration of the photoconductive antenna. (b) Time domain traces of the observed terahertz signals. The traces were shifted vertically and horizontally for clarity. (c) Amplitude spectra of the time domain traces.

Image of FIG. 2.
FIG. 2.

Peak-to-peak amplitude in the time domain traces as functions of the spot size of the probe pulses. The numerical values are the gap length of the antenna.

Image of FIG. 3.
FIG. 3.

Incident power dependence of the (a) peak-to-peak amplitude in the time domain traces and (b) the conductance of the antenna. The lines represent the dependence of for the probe power .

Image of FIG. 4.
FIG. 4.

Averaged values of the noise spectra observed without terahertz waves as a function of the incident power on the detector antenna. The dashed line indicates the value of the amplifier noise obtained without the antenna.

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/content/aip/journal/apl/97/20/10.1063/1.3519480
2010-11-19
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Improved sensitivity of terahertz detection by GaAs photoconductive antennas excited at 1560 nm
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/20/10.1063/1.3519480
10.1063/1.3519480
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