Quantum theory of luminescence in multiple-quantum-well Bragg structures

Schäfer, Martin; Werchner, M.; Hoyer, W.; Kira, M.; Koch, S. W.

doi:10.1103/physrevb.74.155315

Cited by 11 publications

(7 citation statements)

References 28 publications

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“…The found decrease in luminescence for Bragg structures is equivalent to the so-called subradiance effect obtained in Ref. 25 on the basis of the fully quantum calculations. We demonstrate here that this effect has a purely classical origin and is caused by the formation of polariton stop band in Bragg MQW systems.…”

Section: ͑50͒supporting

confidence: 82%

“…Since we will be interested in the effects of photonic environment on the luminescence rather than in a microscopic description of the processes of the exciton relaxation and recombination, we will base our theory on macroscopic Maxwell's equations with a noncoherent polarization source term, which would simulate noncoherent exciton population created by a nonresonant pumping. The phenomenological nature of our work distinguishes it from a recent paper, 25 in which microscopic theory of spontaneous emission of Bragg MQW structures was based on an approach in which both electron-hole dynamics and electromagnetic field were treated quantum mechanically. 26 Phenomenological nature of our theory allows for establishing a direct and clear connection between global optical properties of MQW structures and their luminescence spectra, which is important for understanding an intimate relationship between geometrical structure of MQW systems and their emission properties.…”

Section: Introductionmentioning

confidence: 91%

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Exciton luminescence in one-dimensional resonant photonic crystals: A phenomenological approach

et al. 2007

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A phenomenological theory of luminescence properties of one-dimensional resonant photonic crystals is developed within the framework of classical Maxwell's equations with fluctuating polarization terms representing noncoherent sources of emission. The theory is based on an effective general approach in determining linear response of these structures and takes into account formation of polariton modes due to coherent radiative coupling between their constituting elements. The general results are applied to Bragg multiplequantum-well structures, and theoretical luminescence spectra of these systems are compared with experimental results. The relation between absorption and luminescence spectra is also discussed.

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Section: ͑50͒supporting

confidence: 82%

Section: Introductionmentioning

confidence: 91%

Exciton luminescence in one-dimensional resonant photonic crystals: A phenomenological approach

et al. 2007

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“…Thus, for atomic chains this thrust is still ongoing. In this respect, the noble metal chains on Ge(001) attract attention [4,12,13]. The recently discovered Au chains [4] have a uniquely elevated architecture and a pronounced spatial separation, suggestive of low inter-chain coupling.…”

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confidence: 99%

Strictly one-dimensional electron system in Au chains on Ge(001) revealed by photoelectronk-space mapping

et al. 2011

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Atomic nanowires formed by Au on Ge(001) are scrutinized for the band topology of the conduction electron system by k-resolved photoemission. Two metallic electron pockets are observed. Their Fermi surface sheets form straight lines without undulations perpendicular to the chains within experimental uncertainty. The electrons hence emerge as strictly confined to one dimension. Moreover, the system is stable against a Peierls distortion down to 10 K, lending itself for studies of the spectral function. Indications for unusually low spectral weight at the chemical potential are discussed.

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“…A recent addition to the class of surface defined 1D systems are atomic nanowires on the Ge(001) surface, formed by Pt [13,14,15] and Au [16,17]. Specifically the Au nanowires have a highly pronounced 1D architecture, see Fig.…”

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Symmetry-Breaking Phase Transition without a Peierls Instability in Conducting Monoatomic Chains

et al. 2011

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The one-dimensional (1D) model system Au/Ge(001), consisting of linear chains of single atoms on a surface, is scrutinized for lattice instabilities predicted in the Peierls paradigm. By scanning tunneling microscopy and electron diffraction we reveal a second-order phase transition at 585 K. It leads to charge ordering with transversal and vertical displacements and complex interchain correlations. However, the structural phase transition is not accompanied by the electronic signatures of a charge density wave, thus precluding a Peierls instability as origin. Instead, this symmetry-breaking transition exhibits three-dimensional critical behavior. This reflects a dichotomy between the decoupled 1D electron system and the structural elements that interact via the substrate. Such substrate-mediated coupling between the wires thus appears to have been underestimated also in related chain systems.

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Quantum theory of luminescence in multiple-quantum-well Bragg structures

Cited by 11 publications

References 28 publications

Exciton luminescence in one-dimensional resonant photonic crystals: A phenomenological approach

Exciton luminescence in one-dimensional resonant photonic crystals: A phenomenological approach

Strictly one-dimensional electron system in Au chains on Ge(001) revealed by photoelectronk-space mapping

Symmetry-Breaking Phase Transition without a Peierls Instability in Conducting Monoatomic Chains

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