Abbreviated Journal Title
Appl. Phys. Lett.
SINGLE-CRYSTALS; THZ RADIATION; Physics, Applied
To obtain higher power P and frequency f emissions from the intrinsic Josephson junctions in a high-T-c superconducting Bi2Sr2CaCu2O8+delta 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 mu W, an order of magnitude greater than from previous devices, was found at T-b similar to 55K 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 = 10K on an inner I-V branch, but away from cavity resonance frequencies. A possible explanation is presented.
Applied Physics Letters
Kashiwagi, Takanari; Yamamoto, Takashi; Kitamura, Takeo; Asanuma, Kentaro; Watanabe, Chiharu; Nakade, Kurama; Yasui, Takaki; Saiwai, Yoshihiko; Shibano, Yuuki; Kubo, Hiroyuki; Sakamoto, Kazuki; Katsuragawa, Takuya; Tsujimoto, Manabu; Delfanazari, Kaveh; Yoshizaki, Ryozo; Minami, Hidetoshi; Klemm, Richard A.; and Kadowaki, Kazuo, "Generation of electromagnetic waves from 0.3 to 1.6 terahertz with a high-T-c superconducting Bi2Sr2CaCu2O8+delta intrinsic Josephson junction emitter" (2015). Faculty Bibliography 2010s. 6620.