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

Kadowaki, K.; Yamaguchi, Hiroshi; Kawamata, Kohei; Yamamoto, Takashi; Minami, Hidetoshi; Kakeya, Itsuhiro; Welp, U.; Özyüzer, L.; Koshelev, A. E.; Kurter, Cihan; Gray, K. E.; Kwok, W. K.

doi:10.1016/j.physc.2007.11.090

Cited by 155 publications

(183 citation statements)

References 7 publications

Supporting

Mentioning

174

Contrasting

Order By: Relevance

“…We showed that the emission frequency is proportional to 1/w, where w is the width of the mesa indicating that the cavity resonance synchronizes the oscillations of the IJJ, resulting in strong radiation. 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].…”

Section: Introductionmentioning

confidence: 97%

Terahertz wave emission from intrinsic Josephson junctions in high-T_csuperconductors

Özyüzer

Simsek

Köseoğlu

et al. 2009

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Recently, we experimentally demonstrated that rectangular mesa structures of intrinsic Josephson junctions (IJJ) in Bi 2 Sr 2 CaCu 2 O 8+d (Bi2212) can be used as a compact solid-state generator of continuous, coherent and polarized terahertz (THz) radiation. In the present work, we will exhibit tall mesas (over 600 junctions) which were fabricated using UV lithography, e-beam lithography with photoresist and e-beam lithography with a Ti selective etching technique. We will present measurements of the c-axis resistance as a function of temperature and of current-voltage characteristics of THz emitting mesas with lateral sizes ranging from 30 × 300 to 100 × 300 μm 2 . Furthermore, we will discuss the dependence of the characteristics of the mesa structures on the oxygen doping level of the Bi2212 crystals. We will also experimentally show that the voltage-frequency relation of the ac Josephson effect has to match the cavity resonance for successful emission.

show abstract

Section: Introductionmentioning

confidence: 97%

Terahertz wave emission from intrinsic Josephson junctions in high-T_csuperconductors

Özyüzer

Simsek

Köseoğlu

et al. 2009

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Stimulated by the recent progress in radiation of terahertz (THz) electromagnetic waves using a mesa of Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO) single crystal [1,2], we investigated the dynamics of superconductivity phase of the intrinsic Josephson junctions with strong inductive couplings. A new dynamics state was found in the absence of an external magnetic field, in which the gauge invariant phase difference in each junction is characterized by static ±π phase kinks stacked periodically along the c axis, in addition to a phase term evolving linearly with time according to the ac Josephson relation and the plasma term [3,4].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional phase-kink state in a thick stack of Josephson junctions and terahertz radiation

Lin

2008

Phys. Rev. B

View full text Add to dashboard Cite

The dynamics of superconductivity phase in thick stack of Josephson junctions with strong inductive coupling, such as the one realized in layered high-Tc cuprates and possibly the recently discovered FeAs-based superconductors, is investigated under a c-axis bias voltage and in the absence of an external magnetic field. The kink state found previously by the present authors is extended to three dimensions for both rectangular and cylindrical geometries. The IV characteristics are calculated and the distributions of electromagnetic field inside the samples are clarified. The solution for a cylindrical mesa exhibits a higher resonating frequency than that of a square mesa with the same linear size by a factor of ∼ 2.4. More importantly, from the radius dependence of the resonance frequency for the cylinder geometry it is possible to confirm directly the kink state, and thus to reveal the mechanism of the strong radiation discovered in recent experiments.

show abstract

“…Furthermore, in the non-uniform S/FI/S junction, several applications such as spin-current emitter by utilizing spin-wave excitation in the FI 41 may be also possible in analogy with the emission of coherent THz radiation in the high-T c cuprate, [42][43][44] 7/10…”

Section: Summary and Discussionmentioning

confidence: 99%

“…In fact, the inhomogeneity of the junction was one of essential factors to realize the emission without external magnetic field. [42][43][44] However, novel devices using the S/FI/S junction are beyond the scope of the present paper and will be studied elsewhere.…”

mentioning

confidence: 99%

Zero-Field Fiske Resonance Coupled with Spin-Waves in Ferromagnetic Josephson Junctions

2014

View full text Add to dashboard Cite

AC Josephson current density in a Josephson junction with DC bias is spatially modulatedby an external magnetic field, and induces an electromagnetic (EM) field inside the junction.The current-voltage (I-V ) curve exhibits peaks due to the resonance between the EM field and the spatially modulated AC Josephson current density. This is called Fiske resonance.Such a spatially modulated Josephson current density can be also induced by a non-uniform insulating barrier and the Fiske resonance appears without external magnetic field. This is called zero-field Fiske resonance (ZFFR). In this paper, we theoretically study the ZFFR coupled with spin-waves in a superconductor/ferromagnetic insulator/superconductor junction (ferromagnetic Josephson junction) with a non-uniform ferromagnetic insulating barrier.The resonant mode coupled with spin-waves can be induced without external magnetic field.We find that the I-V curve shows resonant peaks associated with composite excitations of spin-waves and the EM field in the junction. The voltage at the resonance is obtained as a function of the normal modes of EM field. The ZFFRs coupled with spin-waves are found as peak structures in the DC Josephson current density as a function of bias voltage.

show abstract

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

Cited by 155 publications

References 7 publications

Terahertz wave emission from intrinsic Josephson junctions in high-T_csuperconductors

Terahertz wave emission from intrinsic Josephson junctions in high-T_csuperconductors

Three-dimensional phase-kink state in a thick stack of Josephson junctions and terahertz radiation

Zero-Field Fiske Resonance Coupled with Spin-Waves in Ferromagnetic Josephson Junctions

Contact Info

Product

Resources

About

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

Cited by 155 publications

References 7 publications

Terahertz wave emission from intrinsic Josephson junctions in high-Tcsuperconductors

Terahertz wave emission from intrinsic Josephson junctions in high-Tcsuperconductors

Three-dimensional phase-kink state in a thick stack of Josephson junctions and terahertz radiation

Zero-Field Fiske Resonance Coupled with Spin-Waves in Ferromagnetic Josephson Junctions

Contact Info

Product

Resources

About

Terahertz wave emission from intrinsic Josephson junctions in high-T_csuperconductors

Terahertz wave emission from intrinsic Josephson junctions in high-T_csuperconductors