Landau Level Spectroscopy: Interband Effects and Faraday Rotation

Keßler, F. R.; Metzdorf, J.

doi:10.1016/b978-0-444-88535-7.50018-2

Cited by 5 publications

(10 citation statements)

References 255 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dependence of transitions energies on N results in the periodic oscillatory structure of both absorption and MCD spectra (Figure B.1b), which is a signature of the Landau level spectroscopy. 213 Furthermore, the spinorbit splitting of the Landau states shown in Figure B.1a leads to both positive and negative MCD bands. As emphasized in the main text, in addition to robust MCD signal at high temperature (above 300 K) and low field (below 1 T), the absence of any periodic variations in either absorption or MCD spectra and the presence of only negative MCD signal at high temperatures demonstrate that carrier polarization in plasmonic semiconductor NCs reported in this work is associated with circular magnetoplasmonic resonance as a collective behaviour of free electrons.…”

Section: Appendix B Landau Level Spectroscopymentioning

confidence: 98%

“…B.1a). 213 The transition energies for the corresponding MCD spectra in Faraday where g E is the optical bandgap energy, r m  is the reduced effective mass of the bands and c  is the associated cyclotron frequency, and g is the combined g-factor of both bands. The dependence of transitions energies on N results in the periodic oscillatory structure of both absorption and MCD spectra (Figure B.1b), which is a signature of the Landau level spectroscopy.…”

Section: Appendix B Landau Level Spectroscopymentioning

confidence: 99%

See 1 more Smart Citation

Plasmon-induced carrier polarization in semiconductor nanocrystals

et al. 2018

View full text Add to dashboard Cite

Spintronics and valleytronics are emerging quantum electronic technologies that rely on using electron spin and multiple extrema of the band structure (valleys), respectively, as additional degrees of freedom. There are also collective properties of electrons in semiconductor nanostructures that potentially could be exploited in multifunctional quantum devices. Specifically, plasmonic semiconductor nanocrystals offer an opportunity for interface-free coupling between a plasmon and an exciton. However, plasmon-exciton coupling in single-phase semiconductor nanocrystals remains challenging because confined plasmon oscillations are generally not resonant with excitonic transitions. Here, we demonstrate a robust electron polarization in degenerately doped InO nanocrystals, enabled by non-resonant coupling of cyclotron magnetoplasmonic modes with the exciton at the Fermi level. Using magnetic circular dichroism spectroscopy, we show that intrinsic plasmon-exciton coupling allows for the indirect excitation of the magnetoplasmonic modes, and subsequent Zeeman splitting of the excitonic states. Splitting of the band states and selective carrier polarization can be manipulated further by spin-orbit coupling. Our results effectively open up the field of plasmontronics, which involves the phenomena that arise from intrinsic plasmon-exciton and plasmon-spin interactions. Furthermore, the dynamic control of carrier polarization is readily achieved at room temperature, which allows us to harness the magnetoplasmonic mode as a new degree of freedom in practical photonic, optoelectronic and quantum-information processing devices.

show abstract

Section: Appendix B Landau Level Spectroscopymentioning

confidence: 98%

Section: Appendix B Landau Level Spectroscopymentioning

confidence: 99%

Plasmon-induced carrier polarization in semiconductor nanocrystals

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Magneto-optical phenomena originating from the loss of symmetry between left and right circularly polarized light in the presence of a magnetic field are widely used for characterization of different kinds of matter 1,2 . Magnetic circular dichroism (MCD) spectra help to assign overlapping bands and give insight into magnetic properties of the ground and excited states.…”

Section: Introductionmentioning

confidence: 99%

“…In approach (3), such a numerical noise is supressed automatically. Approach (3) also allows us to work under purely periodic boundary conditions as opposed to approach (2), where contributions of open boundaries should be treated carefully [24][25][26] .…”

Section: Introductionmentioning

confidence: 99%

Orbital magneto-optical response of periodic insulators from first principles

et al. 2019

View full text Add to dashboard Cite

Magneto-optical response, i.e. optical response in the presence of a magnetic field, is commonly used for characterization of materials and in optical communications. However, quantum mechanical description of electric and magnetic fields in crystals is not straightforward as the position operator is ill defined. We present a reformulation of the density matrix perturbation theory for timedependent electromagnetic fields under periodic boundary conditions, which allows us to treat the orbital magneto-optical response of solids at the ab initio level. The efficiency of the computational scheme proposed is comparable to standard linear-response calculations of absorption spectra and the results of tests for molecules and solids agree with the available experimental data. A clear signature of the valley Zeeman effect is revealed in the continuum magneto-optical spectrum of a single layer of hexagonal boron nitride. The present formalism opens the path towards the study of magneto-optical effects in strongly driven low-dimensional systems.arXiv:1806.09886v4 [cond-mat.mtrl-sci]

show abstract

“…The angle between the major axis and the incident polarization direction defines the Faraday rotation (FR) in a transmission and the magnetooptic Kerr rotation (KR) in a reflection. Both effects can be phenomenologically described by the off-diagonal Εxy component of the dielectric tensor in the presence of a longitudinal magnetic • field: i xy = Δ^/2 with ΔΈ = F--+, where -+ are the complex dielectric functions for right and left circularly polarized light (σ+) [14]. The angles of the FR and KR can be calculated from the formulas: When the sample is a thin film or has a multilayer structure, like in MQWs, the multiple internal reflections cause the superposition of the FR and KR in the reflection configuration and we can talk about some effective magnetorotation (MR).…”

mentioning

confidence: 99%

Large Filling-Factor-Dependent Spin Splitting in Magnetooptic Kerr Effect in GaAs/AlGaAs Multiple Quantum Wells

et al. 1998

View full text Add to dashboard Cite

Magnetooptic Kerr effect in GaAs/Al0.312 Ga0.688 As multiple quantum wells was investigated in the integer quantum Hall regime. The measurements have been performed in magnetic fields up to 14.5 T, at the temperature of 1.8 K. Experimental data indicate the discontinuous behavior of the magnetooptic Kerr effect spectrum as a function of the filling factor. For odd filling factor values v = 3 and 5 we observe the large spin splitting. The effects cannot be explained in the one-particle model.PACS numbers: 78.20. Ls, 73.20.Dx, 78.66.Fd Interband magnetooptical spectroscopy in strong magnetic fields is a sensitive method in studies of two-dimensional electron gas (2DΕG) [1][2][3][4][5]. It allows us to study the correlations between the optical properties of 2DΕG and the integer and fractional quantum Hall effects (ΙQHE and FQHE). Many experimental and theoretical papers are devoted to quantum Hall state with filling factor v = 1, when all electrons occupy the spin-split lowest Landau level [6][7][8][9]. It was established that the v = 1 state is governed predominantly by the ferromagnetic many-body exchange interaction (the skyrmions). Our report concerns the magnetooptical properties of the 2DΕG at higher filling factors v > 1.In most cases the method of photoluminescence (PL), photoluminescence excitation (PLE), and the method of reflectance were used. The PL and PLE depend on complicated relaxation effects that take place before the electrons relax to the lowest energy state. Therefore, some people prefer to use the magnetoabsorption [2,6,8].

show abstract

Landau Level Spectroscopy: Interband Effects and Faraday Rotation

Cited by 5 publications

References 255 publications

Plasmon-induced carrier polarization in semiconductor nanocrystals

Plasmon-induced carrier polarization in semiconductor nanocrystals

Orbital magneto-optical response of periodic insulators from first principles

Large Filling-Factor-Dependent Spin Splitting in Magnetooptic Kerr Effect in GaAs/AlGaAs Multiple Quantum Wells

Contact Info

Product

Resources

About