Lasing without inversion

Mompart, J.; Corbalán, R.

doi:10.1088/1464-4266/2/3/201

Cited by 291 publications

(146 citation statements)

References 97 publications

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“…An intricate photon emission pattern emerges as a result of cavity coupling, periodic driving, and strong electron-phonon coupling [21]. Our results can be understood in analogy to lasing without inversion in atomic physics [14].…”

Section: Introductionmentioning

confidence: 59%

“…As mentioned in the Introduction, such a strongly driven twolevel system coupled to a cavity is analogous to systems commonly studied in atomic physics to realize lasing without inversion [14]. An important distinction, however, is that, because of the strong driving, we are not allowed to make the rotating wave approximation in describing the two-level dynamics.…”

Section: Driven Dqd Gain Mediummentioning

confidence: 99%

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Double Quantum Dot Floquet Gain Medium

et al. 2016

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Strongly driving a two-level quantum system with light leads to a ladder of Floquet states separated by the photon energy. Nanoscale quantum devices allow the interplay of confined electrons, phonons, and photons to be studied under strong driving conditions. Here, we show that a single electron in a periodically driven double quantum dot functions as a "Floquet gain medium," where population imbalances in the double quantum dot Floquet quasienergy levels lead to an intricate pattern of gain and loss features in the cavity response. We further measure a large intracavity photon number n c in the absence of a cavity drive field, due to equilibration in the Floquet picture. Our device operates in the absence of a dc current-one and the same electron is repeatedly driven to the excited state to generate population inversion. These results pave the way to future studies of nonclassical light and thermalization of driven quantum systems.

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Section: Introductionmentioning

confidence: 59%

Section: Driven Dqd Gain Mediummentioning

confidence: 99%

Double Quantum Dot Floquet Gain Medium

et al. 2016

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“…Quantum coherence and interference in atomic systems can lead to many interesting effects such as lasing without inversion (LWI), electromagnetically induced transparency (EIT), coherent population trapping (CPT) and so on, in which LWI gets special attention due to its important application value [1]. A kind of coherence can be created by interference of spontaneous emission (usually called as the vacuum-induced coherence (VIC) or spontaneously generated coherence (SGC)), and it depends on the nonorthogonality of dipole matrix elements.…”

Section: Introductionmentioning

confidence: 99%

Effect of Incoherent Pumping on Phase??qdependent Absorption Property of Atomic Systems

Li¹,

Liu²

2018

Proceedings of the 8th International Conference on Social Network, Communication and Education (SNCE 2018)

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Abstract. We find that in the open and closed ladder systems with vacuum induced coherence, the relative phase between the probe and driving fields has an important manipulation role on the absorption property, while the incoherent pumping has a considerable effect on the phase-dependent absorption property. In the both systems, by adjusting the incoherent pumping the switching from absorption to gain and from lasing with inversion to lasing without inversion (LWI) can be realized and the largest LWI gain can be gotten. However, when the incoherent pumping is absent, for any value of the relative phase, LWI still can't be obtained in the closed system but can in the open system; moreover, in the open system, for suitable values of the relative phase, LWI gain gotten when the incoherent pumping is absent is obviously larger than that obtained when the incoherent pumping presents.

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“…There are many interesting phenomena in quantum optics and atomic physics, induced by quantum coherence and quantum interference. Examples include electromagnetically induced transparency (EIT) [1,2,3]], coherent population trapping (CPT) [4], cancelation of spontaneous emission [5], superluminal and subluminal light propagation [6,7], lasing without inversion [8,9], and so on. The effect of electromagnetically induced transparency (EIT) has led to many interesting nonlinear optical phenomena.…”

Section: Introductionmentioning

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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Lasing without inversion

Cited by 291 publications

References 97 publications

Double Quantum Dot Floquet Gain Medium

Double Quantum Dot Floquet Gain Medium

Effect of Incoherent Pumping on Phase??qdependent Absorption Property of Atomic Systems

Controllable Kerr Nonlinearity via Incoherent Pump Fields in Semiconductor Quantum Wells

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