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Author |
Siddiqi, I.; Prober, D. E. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Nb–Au bilayer hot-electron bolometers for low-noise THz heterodyne detection |
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Journal Article |
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Year |
2004 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
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Volume |
84 |
Issue |
8 |
Pages |
1404 |
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Keywords |
HEB, mixers, dynamic range, saturation, LO power, local oscillator power, Nb |
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Abstract |
The sensitivity of present Nb diffusion-cooled hot-electron bolometer (HEB) mixers is not quantum limited, and can be improved by reducing the superconducting transition temperature TC. Lowering TC reduces thermal fluctuations, resulting in a decrease of the mixer noise temperature TM. However, lower TC mixers have reduced dynamic range and saturate more easily due to background noise. We present 30 GHz microwave measurements on a bilayer HEB system, Nb–Au, in which TC can be tuned with Au layer thickness to obtain the maximum sensitivity for a given noise background. These measurements are intended as a guide for the optimization of THz mixers. Using a Nb–Au mixer with TC = 1.6 K, we obtain TM = 50 K with 2 nW of local oscillator (LO) power. Good mixer performance is observed over a wide range of LO power and bias voltage and such a device should not exhibit saturation in a THz receiver. |
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0003-6951 |
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571 |
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Author |
Zwiller, V.; Aichele, T.; Seifert, W.; Persson, J.; Benson, O. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Generating visible single photons on demand with single InP quantum dots |
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Journal Article |
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Year |
2003 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
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Volume |
82 |
Issue |
10 |
Pages |
1509-1511 |
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Keywords |
single photon, quantum dot, InP |
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0003-6951 |
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no |
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503 |
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Author |
Ganzevles, W. F. M.; Gao, J. R.; de Korte, P. A. J.; Klapwijk, T. M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Direct response of microstrip line coupled Nb THz hot-electron bolometer mixers |
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Journal Article |
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Year |
2001 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
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79 |
Issue |
15 |
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2483-2485 |
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0003-6951 |
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311 |
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Zwiller, Vale<cc><81>ry; Blom, Hans; Jonsson, Per; Panev, Nikolay; Jeppesen, Sören; Tsegaye, Tedros; Goobar, Edgard; Pistol, Mats-Erik; Samuelson, Lars; Björk, Gunnar |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Single quantum dots emit single photons at a time: Antibunching experiments |
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Journal Article |
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Year |
2001 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
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78 |
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17 |
Pages |
2476 |
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antibunching, quantum dot |
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0003-6951 |
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no |
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502 |
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Author |
Mason, Whitney; Waterman, J. R. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Electrical and optical characteristics of two color mid wave HgCdTe infrared detectors |
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Journal Article |
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Year |
1999 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
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Volume |
74 |
Issue |
11 |
Pages |
1633-1635 |
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0003-6951 |
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no |
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RPLAB @ s @ |
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461 |
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