Publikationsdatum:
2015-03-05
Beschreibung:
To obtain higher power P and frequency f emissions from the intrinsic Josephson junctions in a high- T c superconducting Bi 2 Sr 2 CaCu 2 O 8+ δ single crystal, we embedded a rectangular stand-alone mesa of that material in a sandwich structure to allow for efficient heat exhaust. By varying the current-voltage ( I-V ) bias conditions and the bath temperature T b , f is tunable from 0.3 to 1.6 THz. The maximum P of a few tens of μ W, an order of magnitude greater than from previous devices, was found at T b ∼ 55 K on an inner I-V branch at the TM(1,0) cavity resonance mode frequency. The highest f of 1.6 THz was found at T b = 10 K on an inner I–V branch, but away from cavity resonance frequencies. A possible explanation is presented.
Print ISSN:
0003-6951
Digitale ISSN:
1077-3118
Thema:
Physik