Detection of 0.5THz radiation from intrinsic Bi2Sr2CaCu2O8 Josephson junctions

Batov, I. E.; Jin, Xiaoyue; Shitov, S. V.; Koval, Y.; Müller, Paul; Ustinov, A. V.

doi:10.1063/1.2214157

Cited by 73 publications

(64 citation statements)

References 23 publications

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“…7 We succeeded in observation of the intense power of EM emission of $5 lW, which have never been achieved before. It is indeed 5-6 orders of magnitude stronger than that from single Josephson junction, and even a couple of orders of magnitude stronger than the previous reports [3][4][5]. For the emission it is required to fulfill two conditions: Eqs.…”

Section: Discussionmentioning

confidence: 95%

Direct observation of tetrahertz electromagnetic waves emitted from intrinsic Josephson junctions in single crystalline Bi2Sr2CaCu2O8+

Kadowaki

Yamaguchi

Kawamata

et al. 2008

Physica C: Superconductivity and its Applications

155

174

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Section: Discussionmentioning

confidence: 95%

Direct observation of tetrahertz electromagnetic waves emitted from intrinsic Josephson junctions in single crystalline Bi2Sr2CaCu2O8+

Kadowaki

Yamaguchi

Kawamata

et al. 2008

Physica C: Superconductivity and its Applications

155

174

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“…Experimentally, radiation from the high-temperature layered superconductor BSCCO at relatively low frequencies, 7-16 GHz, was detected by Hechtfischer et al [29]. Some indirect evidence of radiation at higher frequencies has been recently reported by Kadowaki et al [30] and Batov et al [31] reported radiation at the frequency 0.5 THz with power 1 pW from BSCCO mesa consisting 100 junctions in zero dc magnetic field.…”

Section: Introductionmentioning

confidence: 95%

Radiation from Flux Flow in Josephson Junction Structures

Bulaevskiǐ

Koshelev

2006

J Supercond

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We derive the radiation power from a single Josephson junction (JJ) and from layered superconductors in the flux-flow regime. For the JJ case we formulate the boundary conditions for the electric and magnetic fields at the edges of the superconducting leads using the Maxwell equations in the dielectric media and find dynamic boundary conditions for the phase difference in JJ which account for the radiation. We derive the fraction of the power fed into JJ transformed into the radiation. In a finite-length JJ this fraction is determined by the dissipation inside JJ and it tends to unity as dissipation vanishes independently of mismatch of the junction and dielectric media impedances. We formulate also the dynamic boundary conditions for the phase difference in intrinsic Josephson junctions in highly anisotropic layered superconductors of the Bi 2 Sr 2 CaCu 2 O 8 type at the boundary with free space. Using these boundary conditions, we solve equations for the phase difference in the linear regime of Josephson oscillations for rectangular and triangular lattices of Josephson vortices. In the case of rectangular lattice for crystals with the thickness along the c-axis much larger than the radiation wavelength we estimate the radiation power per unit length in the direction of magnetic field at the frequency 1 THz as ∼ N µW/cm for Tl 2 Ba 2 CaCu 2 O 8 and ∼ 0.04 N µW/cm for Bi 2 Sr 2 CaCu 2 O 8 . For crystals with thickness smaller than the radiation wavelength we found that the radiation power in the resonance is independent on number of layers and can be estimated at 1 THz as 0.5 W/cm (Tl 2 Ba 2 CaCu 2 O 8 ) and 24 mW/cm (Bi 2 Sr 2 CaCu 2 O 8 ). For rectangular lattice, due to superradiation regime, up to half of power fed into the crystal may be converted into the radiation. In the case of triangular or random lattice in the direction perpendicular to the layers the fraction of power converted into the radiation depends on the dissipation rate and is much lower than for rectangular lattice in the case of high-temperature superconductors with nodes in the gap.

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“…Radiation from BSCCO with injection of quasiparticles has been reported [20,21,22,23,24]. Alternatively, the terahertz radiation without a magnetic field has also been attempted [25,26,27,28,29]. Recently, a strong coherent radiation from BSCCO in the absence of a magnetic field was observed [27,29], where the mesa of the single crystal of BSCCO forms a cavity.…”

Section: Introductionmentioning

confidence: 99%

Phase dynamics in intrinsic Josephson junctions and their electrodynamics

Lin

2009

Phys. Rev. B

174

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We present a theoretical description of the phase dynamics and its corresponding electrodynamics in a stack of inductively coupled intrinsic Josephson junctions of layered high-Tc superconductors in the absence of an external magnetic field. Depending on the spatial structure of the gauge invariant phase difference, the dynamic state is classified into: state with kink, state without kink, and state with solitons. It is revealed that in the state with phase kink, the plasma is coupled to the cavity and the plasma oscillation is enhanced. In contrast, in the state without kink, the plasma oscillation is weak. It points a way to enhance the radiation of electromagnetic from high-Tc superconductors. We also perform numerical simulations to check the theory and a good agreement is achieved. The radiation pattern of the state with and without kink is calculated, which may serve as a fingerprint of the dynamic state realized by the system. At last, the power radiation of the state with solitons is calculated by simulations. The possible state realized in the recent experiments is discussed in the viewpoint of the theoretical description. The state with kink is important for applications including terahertz generators and amplifiers.

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Detection of 0.5THz radiation from intrinsic Bi2Sr2CaCu2O8 Josephson junctions

Cited by 73 publications

References 23 publications

Direct observation of tetrahertz electromagnetic waves emitted from intrinsic Josephson junctions in single crystalline Bi2Sr2CaCu2O8+

Direct observation of tetrahertz electromagnetic waves emitted from intrinsic Josephson junctions in single crystalline Bi2Sr2CaCu2O8+

Radiation from Flux Flow in Josephson Junction Structures

Phase dynamics in intrinsic Josephson junctions and their electrodynamics

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