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Wide dynamic range terahertz detector pixel for active spectroscopic imaging with quantum cascade lasers
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10.1063/1.3265958
/content/aip/journal/apl/95/21/10.1063/1.3265958
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/21/10.1063/1.3265958
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Micrograph of a five elements bolometer array. Inset: Scanning electron micrograph of one of the long free standing Nb bridge.

Image of FIG. 2.
FIG. 2.

Frequency response to a blackbody source of the SHAB (continuous line) and of a flat-response pyroelectric detector in the same FT-IR setup (dashed line). Arrows indicate the operation frequency of QCLs used for further experiments. Ticks below the SHAB spectrum indicate the position of the main water vapor absorption lines up to 3 THz. Inset: Bolometer characteristics (line) and noise equivalent power (dots).

Image of FIG. 3.
FIG. 3.

(a) SHAB response to single pulses from QCL1 (thick lines, at 2.5 THz), and from QCL2 (thin lines, at 4.4 THz). (b) Signal current vs optical power at 1.5 THz (triangle), 2.5 THz (full squares) or 4.4 THz (circles) with linear fits (dotted lines). The full line is the electric responsivity, the top dashed line is the maximum current signal and the bottom dashed line represents the rms noise floor in a 30 Hz bandwidth (see text). (c) Baseline and signal stability of the SHAB illuminated by QCL1 in quasi-cw and incident power of at 2.5 THz during a typical frame acquisition time.

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/content/aip/journal/apl/95/21/10.1063/1.3265958
2009-11-23
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Wide dynamic range terahertz detector pixel for active spectroscopic imaging with quantum cascade lasers
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/21/10.1063/1.3265958
10.1063/1.3265958
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