Exciton and exciton-magnon photoluminescence in the antiferromagnet 
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Kudlacik, D.; Ivanov, V. Yu.; Yakovlev, D. R.; Sapega, V. F.; Schindler, J. J.; Debus, J.; Bayer, М.; Pisarev, R. V.

doi:10.1103/physrevb.102.035128

Cited by 11 publications

(4 citation statements)

References 62 publications

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“…The light source was a regenerative amplifier, which produced 190-fs laser pulses at 6 kHz. The energy of the fundamental light was tuned by an optical parametric amplifier (OPA) to ℏ = 0.703 eV, for which the SHG energy 2ℏ = 1.406 eV was resonant with the d-d transition of Cu 2+ holes between the d x 2 -y 2 and d xy orbitals (4,18,(21)(22)(23). Note that the spectral width of the electronic transition of ~1 meV was one order of magnitude smaller than the energy spread of the incident laser pulse.…”

Section: Resultsmentioning

confidence: 99%

Nonreciprocal second harmonic generation in a magnetoelectric material

et al. 2021

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Mirror symmetries are of particular importance because they are connected to fundamental properties and conservation laws. Spatial inversion and time reversal are typically associated to charge and spin phenomena, respectively. When both are broken, magnetoelectric cross-coupling can arise. In the optical regime, a difference between forward and backward propagation of light may result. Usually, this nonreciprocal response is small. We show that a giant nonreciprocal optical response can occur when transferring from linear to nonlinear optics, specifically second harmonic generation (SHG). CuB2O4 exhibits SHG transmission changes by almost 100% upon reversal of a magnetic field of just ±10 mT. The observed nonreciprocity results from an interference between magnetic-dipole and electric-dipole SHG. Although the former is inherently weaker than the latter, a resonantly enhanced magnetic-dipole transition has a comparable amplitude as a nonresonant electric-dipole transition, thus maximizing the nonreciprocity. Multiferroics and magnetoelectrics are an obvious materials platform to exhibit nonreciprocal nonlinear optical functionalities.

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Section: Resultsmentioning

confidence: 99%

Nonreciprocal second harmonic generation in a magnetoelectric material

et al. 2021

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“…Very unusual effect of direction dependent luminescence induced by magnetic fields has been observed in the photoluminescence of CuB 2 O 4 [13]. Note, that the efficient photoluminescence itself observed in CuB 2 O 4 [13,14] is quite surprising for Cu 2+ oxide compounds. A huge resonance nonreciprocity reaching almost 100% under the reversal of an applied magnetic field has been recently observed in studies of optical second harmonic generation in the range of the lowest-in-energy electronic transition around 1.4055 − 1.4061 eV [15,16].…”

Section: Introductionmentioning

confidence: 86%

“…It is worth noting here that this zero field splitting of the ZP absorption line, as well as the luminescence line, was previously noted in Refs. [14,22], respectively. The observed ZP line splitting is puzzling because the relevant electronic transition takes place between the ground and excited states of a single Cu 2+ ion which are both orbitally nondegenerate.…”

Section: A Absorption Spectra In Zero Magnetic Fieldmentioning

confidence: 99%

Zeeman and Davydov splitting of Frenkel excitons in the antiferromagnet CuB$_2$O$_4$

Kopteva,

Kudlacik,

Yakovlev

et al. 2021

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“…Besides broad studies of the magnetic properties of CuB 2 O 4 and Cu 3 B 2 O 6 crystals, potential magneto-optical, piezoelectric, multiferroic, and photocatalytic applications of CuB 2 O 4 were also reported [ 25 , 26 , 27 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. Furthermore, Cu 3 B 2 O 6 was applied for active electrodes of lithium-ion batteries [ 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Sintering, Microstructure, and Dielectric Properties of Copper Borates for High Frequency LTCC Applications

et al. 2021

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New ceramic materials based on two copper borates, CuB2O4 and Cu3B2O6, were prepared via solid state synthesis and sintering, and characterized as promising candidates for low dielectric permittivity substrates for very high frequency circuits. The sintering behavior, composition, microstructure, and dielectric properties of the ceramics were investigated using a heating microscope, X-ray diffractometry, scanning electron microscopy, energy dispersive spectroscopy, and terahertz time domain spectroscopy. The studies revealed a low dielectric permittivity of 5.1–6.7 and low dielectric loss in the frequency range 0.14–0.7 THz. The copper borate-based materials, owing to a low sintering temperature of 900–960 °C, are suitable for LTCC (low temperature cofired ceramics) applications.

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Exciton and exciton-magnon photoluminescence in the antiferromagnet CuB2O4

Cited by 11 publications

References 62 publications

Nonreciprocal second harmonic generation in a magnetoelectric material

Nonreciprocal second harmonic generation in a magnetoelectric material

Zeeman and Davydov splitting of Frenkel excitons in the antiferromagnet CuB$_2$O$_4$

Sintering, Microstructure, and Dielectric Properties of Copper Borates for High Frequency LTCC Applications

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