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Enhanced performance of resonant sub-terahertz detection in a plasmonic cavity
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10.1063/1.3687698
/content/aip/journal/apl/100/8/10.1063/1.3687698
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/8/10.1063/1.3687698
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Micrograph of a 10 μm wide by 14 μm long HEMT with three independently biased gates at the vertex of a broadband antenna. (b) Mounting of the detector with a Si hyper-hemispherical lens is shown. The detector is illuminated through the substrate.

Image of FIG. 2.
FIG. 2.

(Color online) (a) The detector response is mapped as a function of excitation frequency ν and normalized carrier density nSG/n0 under SG. Theoretically derived modes are plotted in solid and dashed lines. Solid lines correspond to A boundary conditions, while dashed lines correspond to S boundary conditions. Mode number and type are indicated for the first five modes. (b) The normalized carrier density modulation for the first four modes, labeled by number and type, is shown with nSG/n0 = 1. (c) The detector voltage signal with 370 GHz excitation and ISD = +500 nA is plotted as a function of nSG/n0 and nDG/n0. (d) The detector voltage signal with 370 GHz excitation and ISD = −500 nA is plotted as a function of both nSG/n0 and nDG/n0.

Image of FIG. 3.
FIG. 3.

(Color online) (a) The detector NEP as modulation frequency is swept with 241 GHz excitation for 100 nA, 300 nA, and 500 nA source-drain bias currents. The detector was operated at 11.5 K for responsivity measurements and 11.0 K for noise density spectrum characterization. The inset shows the detector I-V in the positive quadrant with the bias points, where NEP is calculated, highlighted by their respective colors. (b) The detector noise density spectrum at 11.0 K for with VBG = −2.450 V. The inset highlights the harmonics of environmental noise sources at 60 Hz and 100 Hz.

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/content/aip/journal/apl/100/8/10.1063/1.3687698
2012-02-23
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enhanced performance of resonant sub-terahertz detection in a plasmonic cavity
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/8/10.1063/1.3687698
10.1063/1.3687698
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