Laser-Induced Quantum Coherence in a Semiconductor Quantum Well

Serapiglia, G. B.; Paspalakis, Emmanuel; Sirtori, Carlo; Vodopyanov, K. L.; Phillips, Chris C.

doi:10.1103/physrevlett.84.1019

Cited by 349 publications

(155 citation statements)

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“…They may, in principle, prove to be useful also as ultralight macroscopic oscillators in demonstrating macroscopic entanglement arising from radiation pressure [32]. At last, extensions from atomic to solid-state materials [33] are highly desir- …”

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confidence: 99%

Optically Tunable Photonic Stop Bands in Homogeneous Absorbing Media

2006

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Resonantly absorbing media supporting electromagnetically induced transparency may give rise to specific periodic patterns where a light probe is found to experience a fully developed photonic band gap yet with negligible absorption everywhere. In ultracold atomic samples the gap is found to arise from spatial regions where Autler-Townes splitting and electromagnetically induced transparency alternate with one another and detailed calculations show that accurate and efficient coherent optical control of the gap can be accomplished. The remarkable experimental simplicity of the control scheme would ease quantum nonlinear optics applications. DOI: 10.1103/PhysRevLett.96.073905 PACS numbers: 42.70.Qs, 03.75.ÿb, 42.30.Rx, 42.50.Gy The ability to mold the flow of light in complex photonic structures, of which photonic crystals [1] are the most familiar ones, is a fundamental issue of scientific and practical importance. Photonic crystals are naturally or artificially structured inhomogeneous materials in which the refractive index varies periodically over a length scale comparable to optical wavelengths. Because their periodic structure leads to Bragg scattering of an incident probe light beam, lightwave propagation in such crystals becomes best described in terms of a photonic band structure [2,3] with band gaps where light does not propagate, akin to the electronic band gaps in crystalline solids.The specific spatial dependence of the optical response in typical photonic crystals and the corresponding photonic band structure are determined once and for all by the way the material periodic structure is grown [1]. The need to design and make photonic crystals with predetermined energy bands could, however, be avoided if one could change their band structure by independent means. Some schemes to tune the band gap structure, e.g., have so far relied on slow electro-and thermo-optics effects of infiltrated liquid crystals [4] or on fast resonant and nonresonant optical nonlinearities in semiconductors [5]. In both instances, modifications do not affect the Brillouin zone while the gross features of the photonic bands remain set by the preassembled periodic structure.We here follow a different approach and show that for a certain class of materials a periodic modulation of the medium optical response can actually be created through externally induced optical nonlinearities. Our specific scheme requires highly effective quantum coherence and interference effects to occur as those commonly observed in multilevel configurations leading to electromagnetically induced transparency [6]. In its simplest form such a transparency is exhibited in a three-level ''lambda'' configuration by a probe in the presence of a plane-wave pump beam [7]. The possibility of using instead a standing-wave pump beam anticipated in Ref. [8] is here exploited to generate photonic periodic structures where regions of weak and strong normal dispersion periodically alternate with one another. The Brillouin zone structure and the band properties are...

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confidence: 99%

Optically Tunable Photonic Stop Bands in Homogeneous Absorbing Media

2006

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“…The population decay rates and dephasing decay rates are added phenomenologically in the above equations [40]. The population decay rates for subband |i denoted by γ i , are due primarily to longitudinal optical (LO) phonon emission events at low temperature.…”

Section: Models and Equationmentioning

confidence: 99%

Controllable Kerr Nonlinearity via Incoherent Pump Fields in Semiconductor Quantum Wells

Hamedi¹,

Sahrai²,

Tajalli³

2013

Quant. Phys. Lett.

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Abstract:A theoretical investigation is carried out into the impact of incoherent pumping fields and quantum interference induced by incoherent pumping fields on the Kerr nonlinearity in a three-level asymmetric semiconductor quantum well system. It is found that Kerr nonlinearity is so sensitive to the rate of incoherent pumping fields, but insensitive to the quantum interference induced by incoherent pumping fields. In addition, it is demonstrated that an enhanced Kerr nonlinearity with reduced absorption can be achieved just via the strength of Fano-type interference and without applying any coherent laser field. The obtained results are very different from the conventional schemes which coherent coupling fields are used to control the Kerr nonlinearity. This advantages make our electronic medium much more practical than its atomic counterpart due to its flexible design and the controllable interference strength.

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“…The transparency of the medium takes place when the absorption on both transitions is suppressed due to destructive interference between excitation pathways to the common upper level. In addition to the absorption eliminated via quantum interference, the EIT effect has also been shown to be an active mechanism to slow down or stop a light pulse completely in various systems, such as an ultracold gas of sodium atoms [38], rare-earth-ion-doped crystals [39], semiconductor quantum wells [40], quantum dot exciton systems [41], and systems with four-level or multi-level cells [42]. Recently, it has been proposed to use a superconductive analogy to EIT in a persistent-current flux qubit biased in a configuration to probe small qubit errors due to decoherence or imperfect state preparation [43,44].…”

Section: Introductionmentioning

confidence: 99%

Nanomechanical-resonator-assisted induced transparency in a Cooper-pair box system

et al. 2008

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We propose a scheme to demonstrate the electromagnetically induced transparency (EIT) in a system of a superconducting Cooper-pair box coupled to a nanomechanical resonator. In this scheme, the nanomechanical resonator plays an important role to contribute additional auxiliary energy levels to the Cooper-pair box so that the EIT phenomenon could be realized in such a system. We call it here resonator-assisted induced transparency (RAIT). This RAIT technique provides a detection scheme in a real experiment to measure physical properties, such as the vibration frequency and the decay rate, of the coupled nanomechanical resonator.

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Laser-Induced Quantum Coherence in a Semiconductor Quantum Well

Cited by 349 publications

References 31 publications

Optically Tunable Photonic Stop Bands in Homogeneous Absorbing Media

Optically Tunable Photonic Stop Bands in Homogeneous Absorbing Media

Controllable Kerr Nonlinearity via Incoherent Pump Fields in Semiconductor Quantum Wells

Nanomechanical-resonator-assisted induced transparency in a Cooper-pair box system

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