Second-harmonic generation as a tool for studying electronic and magnetic structures of crystals: review

Fiebig, Manfred; Павлов, В. В.; Pisarev, R. V.

doi:10.1364/josab.22.000096

Cited by 443 publications

(417 citation statements)

References 144 publications

Supporting

Mentioning

405

Contrasting

Unclassified

Order By: Relevance

“…Second harmonic generation spectroscopy is recognized as a sensitive experimental technique for probing the symmetry of antiferromagnets [17][18][19][20] . The main physical processes that contribute to SHG are the electric dipole (ED) transitions, which are proportional to the induced electrical polarization, magnetic dipole (MD) transitions (∝ induced magnetization), and electric quadrupole (EQ) transitions (∝ quadrupole polarization).…”

Section: Non-linear Optical Susceptibilities and Their Relation mentioning

confidence: 99%

See 1 more Smart Citation

Electronic structure and magnetic symmetry in MnTiO3analyzed by second harmonic generation

et al. 2013

View full text Add to dashboard Cite

Second harmonic generation (SHG) and linear absorbance spectra of MnTiO3 were measured and the 1.88, 2.41, 2.63, and 3.06 eV SHG features were identified as d-d optical transitions from 6 A1g to 4 T1g( 4 G), 4 T2g( 4 G), { 4 Eg, 4 A1g( 4 G)}, and 4 Eg( 4 D) respectively. These zero-phonon transitions were used to calculate the octahedral crystal field splitting energy (∆0) and the Racah parameters B and C. The SHG spectra showed significant distinctions between the antiferromagnetic and the paramagnetic or spin-flop phases. The polarization dependence of the SHG in the spin-flop phase provided optical evidence that the spins canted from the c-axis toward the a-axis. These distinctions between the three magnetic phases could be useful for mapping 180 • antiferromagnetic domains in MnTiO3.2

show abstract

Section: Non-linear Optical Susceptibilities and Their Relation mentioning

confidence: 99%

“…Second harmonic generation (SHG) is a convenient and effective tool for probing the symmetry of electronic and magnetic states [17][18][19][20] . The enhancement of SHG near an optical resonance makes it a sensitive probe of electronic energy levels including d-d transitions [21][22][23] .…”

Section: Introductionmentioning

confidence: 99%

Electronic structure and magnetic symmetry in MnTiO3analyzed by second harmonic generation

et al. 2013

View full text Add to dashboard Cite

show abstract

“…In the case of energy dissipation or presence of resonance states the interference term can appear similar to the interference of crystallographic and magnetic contributions in the SHG process. 11,55 A microscopic quantummechanical model, developed in Sec. V, considers a general third order polarization for the IED and CED contributions, therefore the phase is preserved for the entire spectral range and the interference term in Eq.…”

Section: ͑4͒mentioning

confidence: 99%

“…Those can be media with broken space-inversion symmetry operation, e.g., at structural or magnetic phase transitions. 11 This explains why the majority of SHG research in solids is focused on piezoelectric and ferroelectric materials oriented to practical applications in nonlinear optics. 12 By contrast the THG process described by a polar fourthrank tensor ijkl ͑3͒ is allowed in materials of any symmetry.…”

Section: Introductionmentioning

confidence: 99%

“…The overwhelming majority of THG studies exploited single laser wavelengths or scanned narrow spectral ranges. Only a spectroscopic approach, as demonstrated by recent SHG studies, 6,11,27,28 allows one to draw unambiguous conclusions on the microscopic nature of the observed nonlinear signals. In particular, THG spectroscopy with high spectral resolution at low temperatures remains to be applied to semiconductors and magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optical third-harmonic spectroscopy of the magnetic semiconductor EuTe

et al. 2010

View full text Add to dashboard Cite

EuTe possesses the centrosymmetric crystal structure m3m of rocksalt type in which the second-harmonic generation is forbidden in electric dipole approximation but the third-harmonic generation ͑THG͒ is allowed. We studied the THG spectra of this material and observed several resonances in the vicinity of the band gap at 2.2-2.5 eV and at higher energies up to 4 eV, which are related to four-photon THG processes. The observed resonances are assigned to specific combinations of electronic transitions between the ground 4f 7 state at the top of the valence band and excited 4f 6 5d 1 states of Eu 2+ ions, which form the lowest energy conduction band. Temperature, magnetic field, and rotational anisotropy studies allowed us to distinguish crystallographic and magnetic-field-induced contributions to the THG. A strong modification of THG intensity for the 2.4 eV band and suppression of the THG for the 3.15 eV band was observed in applied magnetic field. Two main features of the THG spectra were assigned to 5d͑t 2g ͒ and 5d͑e g ͒ subbands at 2.4 eV and 3.15 eV, respectively. A microscopic quantum-mechanical model of the THG response was developed and its conclusions are in qualitative agreement with the experimental results.

show abstract

Second Harmonic Generation Investigation of Symmetry Breaking and Flexoelectricity Induced by Nanoindentations in SrTiO₃

Kolhatkar¹,

Nicklaus²,

Youssef³

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

Strain gradients induced by nanoindentations in bulk undoped strontium titanate (SrTiO 3 ) are investigated. After indenting a 850 nm deep pattern on the SrTiO 3 surface with a 8 GPa hardness and an 83 GPa indentation modulus by a Berkovich tip, the resulting deformation patterns are imaged by Raman spectroscopy and by second harmonic generation microscopy. Cross-shaped compressively stressed regions along the cubic SrTiO 3 primary slip planes are observed. These zones relax toward the unstrained bulk material through localized strain gradients on a length scale of several microns. Second harmonic tomography reveals the reduction of the crystal's centrosymmetry in the vicinity of the crosslike features due to a strain gradient. These results indicate the appearance of flexoelectricity following the nanoindentation process due to the creation of an inhomogeneous strain.

show abstract

Second-harmonic generation as a tool for studying electronic and magnetic structures of crystals: review

Cited by 443 publications

References 144 publications

Electronic structure and magnetic symmetry in MnTiO3analyzed by second harmonic generation

Electronic structure and magnetic symmetry in MnTiO3analyzed by second harmonic generation

Optical third-harmonic spectroscopy of the magnetic semiconductor EuTe

Second Harmonic Generation Investigation of Symmetry Breaking and Flexoelectricity Induced by Nanoindentations in SrTiO₃

Contact Info

Product

Resources

About

Second-harmonic generation as a tool for studying electronic and magnetic structures of crystals: review

Cited by 443 publications

References 144 publications

Electronic structure and magnetic symmetry in MnTiO3analyzed by second harmonic generation

Electronic structure and magnetic symmetry in MnTiO3analyzed by second harmonic generation

Optical third-harmonic spectroscopy of the magnetic semiconductor EuTe

Second Harmonic Generation Investigation of Symmetry Breaking and Flexoelectricity Induced by Nanoindentations in SrTiO3

Contact Info

Product

Resources

About

Second Harmonic Generation Investigation of Symmetry Breaking and Flexoelectricity Induced by Nanoindentations in SrTiO₃