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Gain bandwidth of NbN hot-electron bolometer terahertz mixers on membranes
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10.1063/1.2749302
/content/aip/journal/jap/101/12/10.1063/1.2749302
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/12/10.1063/1.2749302

Figures

Image of FIG. 1.
FIG. 1.

A photo of double slot antennas integrated with bolometers on a thick membrane. The photo is made from the back of the substrate. A few antenna designs were made on the same chip for further antenna investigations.

Image of FIG. 2.
FIG. 2.

The gain bandwidth measurement setup.

Image of FIG. 3.
FIG. 3.

The mixer signal vs IF for HEB mixers on membranes (S001-16,17). The bias points are shown in Table II (and Fig. 3). The roll-off frequency is indicated for all curves. The fitting lines are obtained from (1).

Image of FIG. 4.
FIG. 4.

curves (without LO and with LO) of a mixer on a membrane (S001-16). The bias points, where the GBW was measured, are indicated.

Image of FIG. 5.
FIG. 5.

The mixer signal vs IF for a HEB mixer on a membrane. The bias points are shown in Table II. The roll-off frequencies are indicated for all curves. The fitting lines are obtained from (1).

Image of FIG. 6.
FIG. 6.

An illustration of the electron energy relaxation process in NbN HEB mixers.

Tables

Generic image for table
Table I.

Parameters of HEB mixers. For all devices, the bolometer width was , the length , and the film thickness .

Generic image for table
Table II.

Summary of the measurement results for all samples.

Generic image for table
Table III.

NbN film-substrate transmission coefficient for different substrates, obtained from the electron relaxation time and from the acoustic mismatch theory (Refs. 36 and 37).

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/content/aip/journal/jap/101/12/10.1063/1.2749302
2007-06-26
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Gain bandwidth of NbN hot-electron bolometer terahertz mixers on 1.5μmSi3N4∕SiO2 membranes
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/12/10.1063/1.2749302
10.1063/1.2749302
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