Electromagnetically induced transparency due to intervalence band coherence in a GaAs quantum well

Phillips, Mark C.; Wang, Hailin

doi:10.1364/ol.28.000831

Cited by 166 publications

(75 citation statements)

References 9 publications

(6 reference statements)

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“…24 Experimental results have demonstrated nonradiative relaxation times that are orders of magnitude longer than in QW structures. [25][26][27] There have been studies of midinfrared photodetectors using QDs, 28,29 and optimization issues have been addressed. 30 In addition the room temperature ultraweak absorption of a single buried semiconductor QD was measured.…”

Section: -20mentioning

confidence: 99%

Microscopic model for intersubband gain from electrically pumped quantum-dot structures

2014

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We study theoretically the performance of electrically pumped self-organized quantum dots as a gain material in the mid-IR range at room temperature. We analyze an AlGaAs/InGaAs based structure composed of dots-in-a-well sandwiched between two quantum wells. We numerically analyze a comprehensive model by combining a many-particle approach for electronic dynamics with a realistic modeling of the electronic states in the whole structure. We investigate the gain both for quasi-equilibrium conditions and current injection. Comparing different structures we find that steady-state gain can only be realized by an efficient extraction process, which prevents an accumulation of electrons in continuum states, that make the available scattering pathways through the quantum dot active region too fast to sustain inversion. The tradeoff between different extraction/injection pathways is discussed. Comparing the modal gain to a standard quantum-well structure as used in quantum cascade lasers, our calculations predict reduced threshold current densities of the quantum dot structure for comparable modal gain. Such a comparable modal gain can, however, only be achieved for an inhomogeneous broadening of a quantum-dot ensemble that is close to the lower limit achievable today using self-organized growth.

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Section: -20mentioning

confidence: 99%

Microscopic model for intersubband gain from electrically pumped quantum-dot structures

2014

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“…where r 3 and r 4 are the decoherence rate for both dipole transitions, and r 2 is the nonradiative decoherence rate [1][2][3][4][5].…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…Due to the small effective electron mass, it has advantages of high nonlinear optical coefficients and large electric dipole moments. Several typical interesting phenomena such as electromagnetically induced transparency (EIT) [1][2][3][4][5], lasing without inversion [6], highly efficient four-wave mixing [7], all-optical switching [8], and slow light [1] have been demonstrated. As a method to study quantum coherent control and interference, the relative phase of the applied laser fields has been widely used, which is usually termed as phase control, in several important processes in atomic, molecular, and solid-state systems [9][10][11][12][13][14], but the study of amplification and absorption properties in double-Λ system of GaAs/AlGaAs MQWs has not been reported.…”

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confidence: 99%

Tunable amplification and absorption properties in double-Λ system of GaAs/AlGaAs multiple quantum wells

Yan

Wang

et al. 2012

Chin. Sci. Bull.

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We study the optical amplification and absorption properties in a double-Λ four level system of GaAs/AlGaAs multiple quantum wells (MQWs) under realistic experimental conditions. The amplification and absorption responses of two weak fields can be achieved by adjusting the relative phase, the probe detuning, and the two pump Rabi frequencies appropriately. The investigation is much more practical than its atomic counterpart because of its flexible design and the wide adjustable parameters. It may provide a new possibility in technological applications for the light amplifier working on quantum coherence effects in MQWs solid-state system. In recent years, semiconductor quantum wells has drawn significant attention for the reasons that it can be viewed as the two dimensional electron gas, having properties similar to atomic vapors such as the discrete levels. Due to the small effective electron mass, it has advantages of high nonlinear optical coefficients and large electric dipole moments. Several typical interesting phenomena such as electromagnetically induced transparency (EIT) [1][2][3][4][5], lasing without inversion [6], highly efficient four-wave mixing [7], all-optical switching [8], and slow light [1] have been demonstrated. As a method to study quantum coherent control and interference, the relative phase of the applied laser fields has been widely used, which is usually termed as phase control, in several important processes in atomic, molecular, and solid-state systems [9][10][11][12][13][14], but the study of amplification and absorption properties in double-Λ system of GaAs/AlGaAs MQWs has not been reported. In this paper, we study controllable optical amplification and absorption responses of the probe and the signal laser fields in a double-Λ four-level system on GaAs/AlGaAs MQWs under realistic experimental conditions [1,3,15]. The main advantages of applying our considered MQWs scheme over other approaches are as follows. The MQWs medium studied here is a solid, which is much more practical than that in gaseous medium due to its flexible design and the wide adjustable parameters. The MQWs medium here provides a highly tunable quantum system. The quantum properties of these nanostructures such as the transition energies and dipole moments can be well-manipulated by accurately tailoring their shapes and sizes while they can hardly be found in the models for cold atom media.

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“…[12][13][14][15][16][17][18] For example, Sadeghi et al, 13 in an asymmetric QW, showed that EIT may be obtained with appropriate driving fields, provided that the coherence between the intersubbands considered is preserved for a sufficiently long time. So, quantum coherence and interference in QW structures have attracted great interest due to the potentially important applications in optoelectronics and solid-state quantum information science.…”

Section: -9mentioning

confidence: 99%

Transient and Steady-State Absorptions of a Weak Probe Field in a Coupled Double Quantum-Well Structure

Yang

Lee

2009

Mod. Phys. Lett. B

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We propose and analyze an efficient scheme for suppressing the absorption of a weak probe field based on intersubband transitions in a four-level asymmetric coupled quantum well (CQW) driven coherently by a probe laser field and a control laser field. We study the steady-state process analytically and numerically, and our results show that the probe absorption can be completely eliminated under the condition of Raman resonance (i.e. two-photon detuning is zero). Besides, we can observe one transparency window without requiring one-or two-photon detuning to exactly vanish. This investigation may provide a possible scheme for EIT in solids by using the CQW.

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Electromagnetically induced transparency due to intervalence band coherence in a GaAs quantum well

Abstract: We demonstrate electromagnetically induced transparency in the transient optical response in a GaAs quantum well by using the nonradiative coherence between the heavy-hole and the light-hole valence bands.

Cited by 166 publications

References 9 publications

Microscopic model for intersubband gain from electrically pumped quantum-dot structures

Microscopic model for intersubband gain from electrically pumped quantum-dot structures

Tunable amplification and absorption properties in double-Λ system of GaAs/AlGaAs multiple quantum wells

Transient and Steady-State Absorptions of a Weak Probe Field in a Coupled Double Quantum-Well Structure

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