Polaron Induced Anomalies in the Interband Magnetoabsorption of InSb

Johnson, E. J.; Larsen, David M.

doi:10.1103/physrevlett.16.655

Cited by 171 publications

(64 citation statements)

References 6 publications

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“…In the following, we verify this phonon-induced Fano effect and demonstrate the molecular polaron and its characteristics as an optophononic transparency. Similar in nature, resonant polaron states were described for the regime of cyclotron resonance 29,31 and in multiquantum wells 30 .…”

Section: Resultsmentioning

confidence: 88%

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Optophononics with coupled quantum dots

et al. 2014

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Modern technology is founded on the intimate understanding of how to utilize and control electrons. Next to electrons, nature uses phonons, quantized vibrations of an elastic structure, to carry energy, momentum and even information through solids. Phonons permeate the crystalline components of modern technology, yet in terms of technological utilization phonons are far from being on par with electrons. Here we demonstrate how phonons can be employed to render a single quantum dot pair optically transparent. This phonon-induced transparency is realized via the formation of a molecular polaron, the result of a Fano-type quantum interference, which proves that we have accomplished making typically incoherent and dissipative phonons behave in a coherent and non-dissipative manner. We find the transparency to be widely tunable by electronic and optical means. Thereby we show amplification of weakest coupling channels. We further outline the molecular polaron's potential as a control element in phononic circuitry architecture.

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Section: Resultsmentioning

confidence: 88%

“…The concept of a polaron was first introduced by Landau as a quasi-particle formed by a charge and the deformation of the lattice it causes 28 . Particularly favourable are resonant polaron states as they can exhibit very long coherence times [29][30][31] . Here, a novel resonant polaron, a molecular polaron in a QDM, is being introduced.…”

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confidence: 99%

Optophononics with coupled quantum dots

et al. 2014

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“…If the two levels interact repulsively, then the energies of each will be perturbed so as to avoid crossing each other. Such a phenomenon is not rare in semiconductor physics and has been observed between two vibrational modes 41,42 , two electronic transitions 43,44 , and between an electronic transition and a vibrational mode [45][46][47][48][49] . Whether or not the two levels interact is determined by their symmetries and the requirement of the conservation of energy.…”

Section: Experimental Techniquesmentioning

confidence: 98%

Pressure dependence of donor excitation spectra in AlSb

2003

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We have investigated the behavior of ground to bound excited-state electronic transitions of Se and Te donors in AlSb as a function of hydrostatic pressure. Using broadband far-infrared Fourier transform spectroscopy, we observe qualitatively different behaviors of the electronic transition energies of the two donors. While the pressure derivative of the Te transition energy is small and constant, as might be expected for a shallow donor, the pressure derivatives of the Se transition energies are quadratic and large at low pressures, indicating that Se is actually a deep donor. In addition, at pressures between 30 and 50 kbar, we observe evidence of an anti-crossing between one of the selenium electronic transitions and a two-phonon mode.

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“…When such conditions are realized using high magnetic fields, a characteristic anticrossing behavior called the resonant magnetopolaron effect can be observed. 3,4 The splitting of the donor states resulting from the resonant interaction with the LO phonon provides a direct measure of the electron-phonon interaction. [5][6][7] That is why the resonant magnetopolaron effect has been widely studied in bulk semiconductors 3,4,8,9 as well as in low-dimensional systems including quantum wells 10,11 and quantum dots.…”

Section: Introductionmentioning

confidence: 99%

“…3,4 The splitting of the donor states resulting from the resonant interaction with the LO phonon provides a direct measure of the electron-phonon interaction. [5][6][7] That is why the resonant magnetopolaron effect has been widely studied in bulk semiconductors 3,4,8,9 as well as in low-dimensional systems including quantum wells 10,11 and quantum dots. 12,13 In the classical far-infrared experiments the intradonor 1s-2p +1 transition energy 10,14 or cyclotron frequency 11 has been tuned by means of a high magnetic field into resonance with the LO phonon energy.…”

Section: Introductionmentioning

confidence: 99%

Magnetopolaron effect on shallow donors in GaN

et al. 2006

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Resonant interaction between longitudinal-optic ͑LO͒ phonons and electrons bound on shallow donors in GaN is studied using magnetoluminescence of neutral-donor bound excitons ͑D 0 X͒. The experiments were performed on high-quality freestanding GaN material and heteroepitaxial GaN layers grown on sapphire. In addition to the principal recombination channel of D 0 X, in which donors are left in their ground states, two-electron satellites ͑TES͒ involving different excited donor excitations, as well as replicas of the principal D 0 X transition due to LO phonons, were observed for the oxygen and silicon donors. In order to separate transitions involving ground and excited D 0 X states, variable-temperature experiments were performed. The application of high magnetic fields allows tuning of the donor excitations into resonance with the LO phonon energy. This results in a strong enhancement of TES intensity and the appearance of several anticrossing processes in the vicinity of a LO phonon replica of the principal D 0 X transition. The observed behavior is explained in terms of a resonant interaction between LO phonons and donor-bound electrons ͑magnetopolaron effect͒. The experimental data are described using a phenomenological model that combines the theory of a hydrogen atom in a magnetic field with a model which includes the effects of nonparabolicity, nonresonant polaron corrections, and the resonant magnetopolaron effect on electrons bound to donors. It was found that the interaction in the resonant magnetopolaron regime is stronger for the oxygen than for the silicon donor.

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Polaron Induced Anomalies in the Interband Magnetoabsorption of InSb

Cited by 171 publications

References 6 publications

Optophononics with coupled quantum dots

Optophononics with coupled quantum dots

Pressure dependence of donor excitation spectra in AlSb

Magnetopolaron effect on shallow donors in GaN

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