Emission of Terahertz Waves From Stacks of Intrinsic Josephson Junctions

Terahertz wave emission from intrinsic Josephson junctions in high-Tcsuperconductors

“…These studies stimulated further work on THz generation from intrinsic Josephson junctions in Bi2212 mesas and recently one order of magnitude larger radiation power (∼5 μW) and higher harmonics (up to fourth order, corresponding to 2.5 THz) have been obtained [11]. Tunability of the THz emission and local temperature properties have also been studied [12][13][14].…”

Terahertz emission and detection both based on high-Tc superconductors: Towards an integrated receiver

“…[http://dx.doi.org/10.1063/ 1.4794072] In recent years the investigation of coherent terahertz (THz) emission from stacks of intrinsic Josephson junctions (IJJs) made of the high temperature superconductor Bi 2 Sr 2 CaCu 2 O 8 (BSCCO) has become a major field of research, in terms of both experiment [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] and theory; [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] for reviews, see Refs. 38 and 39.…”

“…2,6,7,37 In both regimes the emission frequency often can be tuned, for various reasons, within $10%. 5,7,10,16 In comparison, the high bias regime still has some advantages. At low bias the IJJs can easily switch from the resistive state to the zero voltage state, affecting the stability of the oscillator.…”

High-T c Josephson junctions

“…The superconducting CuO 2planes are separated by coupling layers of some tenth of a nanometer. On the one hand, such effects can be applied for radiation sources (Gray et al, 2009;Tachiki et al, 2005), while on the other hand they lead to a complex behaviour and additional noise contributions, see e.g. For example the magnetic field dependence of the critical Josephson current is still a Fraunhofer-like dependence, eq.…”

“…Reprinted with permission from Gray KE, Ozyuzer L, Koshelev AE, Kurter C, Kadowaki K, et al (2009), 'Emission of terahertz waves from stack of intrinsic junctions', IEEE Trans. The geometrical resonances lead to restrictions in the emitted frequencies but Gray et al (2009) have demonstrated that a proper shape of the resonator like a trapezoidal mesa cross-section yields to THz-sources with voltage-tunable emission frequencies. Supercond.…”