Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} intrinsic Josephson junction stacks with improved cooling: Coherent emission above 1 THz
- National Institute for Materials Science, Tsukuba 3050047 (Japan)
- Physikalisches Institut and Center for Collective Quantum Phenomena in LISA+, Universität Tübingen, D-72076 Tübingen (Germany)
- Research Institute of Superconductor Electronics, Nanjing University, Nanjing 210093 (China)
- Kotel'nikov Institute of Radio Engineering and Electronics, 125009 Moscow (Russian Federation)
We report on Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} (BSCCO) intrinsic Josephson junction stacks with improved cooling, allowing for a remarkable increase in emission frequency compared to the previous designs. We started with a BSCCO stack embedded between two gold layers. When mounted in the standard way to a single substrate, the stack emits in the range of 0.43–0.82 THz. We then glued a second, thermally anchored substrate onto the sample surface. The maximum voltage of this better cooled and dimension-unchanged sample was increased and, accordingly, both the emission frequencies and the tunable frequency range were significantly increased up to 1.05 THz and to 0.71 THz, respectively. This double sided cooling may also be useful for other “hot” devices, e.g., quantum cascade lasers.
- OSTI ID:
- 22350757
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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