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We report the observation of all-optically tunable Raman fluorescence from a single quantum dot. The Raman photons are produced in an optically-driven Lambda-system defined by subjecting the single electron charged quantum dot to a magnetic…

介观与纳米尺度物理 · 物理学 2009-04-10 G. Fernandez , T. Volz , R. Desbuquois , A. Badolato , A. Imamoglu

Differences in the confinement of electrons and holes in quantum dots are shown to profoundly impact the magnitude of scattering with acoustic phonons in materials where crystal deformation shifts the conduction and valence band in the same…

介观与纳米尺度物理 · 物理学 2013-04-03 A. Nysteen , P. Kaer , J. Mork

The singlet-triplet relaxation in nanowire-based quantum dots induced by confined phonons is investigated theoretically. Due to the quasi-one-dimensional nature of the confined phonons, the singlet-triplet relaxation rates exhibit…

介观与纳米尺度物理 · 物理学 2010-11-05 Y. Yin

Resonance fluorescence from atomic systems consists of a single spectral peak that evolves into a Mollow triplet for a strong excitation field. Photons from different peaks of the triplet show distinct photon correlation that make the…

量子物理 · 物理学 2022-12-29 Boon Long Ng , Chang Hoong Chow , Christian Kurtsiefer

A polarization degenerate microcavity containing charge-controlled quantum dots (QDs) enables equal coupling of all polarization degrees of freedom of light to the cavity QED system, which we explore through resonant laser spectroscopy. We…

We present spectroscopic measurements of the Autler-Townes doublet and the sidebands of the Mollow triplet in a driven superconducting qubit. The ground to first excited state transition of the qubit is strongly pumped while the resulting…

介观与纳米尺度物理 · 物理学 2009-06-21 M. Baur , S. Filipp , R. Bianchetti , J. M. Fink , M. Göppl , L. Steffen , P. J. Leek , A. Blais , A. Wallraff

We develop a theoretical formalism to model the linear spectrum of a quantum dot embedded in a high quality cavity, in presence of an arbitrary mechanism modifying the homogeneous spectrum of the quantum dot. Within the simple assumption of…

其他凝聚态物理 · 物理学 2010-02-08 Guillaume Tarel , Vincenzo Savona

The incoherent, inelastic part of the resonance fluorescence spectrum of a laser-driven atom is known as the Mollow spectrum [B. R. Mollow, Phys. Rev. 188, 1969 (1969)]. Starting from this level of description, we discuss theoretical…

量子物理 · 物理学 2007-05-23 Joerg Evers , Ulrich D. Jentschura , Christoph H. Keitel

We analyze a photon transport through an 1D open waveguide side coupled to the $N$-photon microwave cavity with embedded artificial two- level atom (qubit). The qubit state is probed by a weak signal at the fundamental frequency of the…

介观与纳米尺度物理 · 物理学 2017-05-17 Ya. S. Greenberg , A. N. Sultanov

We study the processes in a quantum dot and its surrounds under resonant excitation with the addition of weak non-resonant light. We observe a decrease in inhomogeneous emission linewidth, as well as previously observed enhancement of…

量子物理 · 物理学 2017-02-15 O. Gazzano , T. Huber , V. Loo , S. Polyakov , E. B. Flagg , G. S. Solomon

We investigate the dynamics of single- and multi-photon emission from detuned strongly coupled systems based on the quantum-dot-photonic-crystal resonator platform. Transmitting light through such systems can generate a range of…

In this paper we report on a tuneable few electron lateral triple quantum dot design. The quantum dot potentials are arranged in series. The device is aimed at studies of triple quantum dot properties where knowing the exact number of…

介观与纳米尺度物理 · 物理学 2015-05-13 L. Gaudreau , A. Kam , G. Granger , S. A. Studenikin , P. Zawadzki , A. S. Sachrajda

We use an on-chip superconducting resonator as a sensitive meter to probe the properties of graphene double quantum dots at microwave frequencies. Specifically, we investigate the charge dephasing rates in a circuit quantum electrodynamics…

We predict that phonon subband quantization can be detected in the non-linear electron current through double quantum dot qubits embedded into nano-size semiconductor slabs, acting as phonon cavities. For particular values of the dot level…

介观与纳米尺度物理 · 物理学 2009-11-07 S. Debald , T. Brandes , B. Kramer

We discuss the fine-tuning of the optical properties of self-assembled quantum dots by the strain perturbation introduced by laser-induced surface defects. We show experimentally that the quantum dot transition red-shifts, independently of…

介观与纳米尺度物理 · 物理学 2012-10-15 Cristian Bonato , Evert van Nieuwenburg , Jan Gudat , Susanna Thon , Hyochul Kim , Martin P. van Exter , Dirk Bouwmeester

We study the evolution of an exciton confined in a quantum dot adiabatically controlled by a frequency-swept (chirped) laser pulse in the presence of carrier-phonon coupling. We focus on the dynamics induced by a linearly polarized beam and…

介观与纳米尺度物理 · 物理学 2013-01-16 K. Gawarecki , S. Lüker , D. E. Reiter , T. Kuhn , M. Glässl , V. M. Axt , A. Grodecka-Grad , P. Machnikowski

It is widely believed that, due to its discrete nature, excitonic states in a quantum dot coupled to dispersionless LO phonons form everlasting mixed states (exciton polarons) showing no line broadening in the spectrum. This is indeed true…

其他凝聚态物理 · 物理学 2009-11-11 E. A. Muljarov , R. Zimmermann

Motivated by recent experiments, we analyse the phonon-assisted steady-state gain of a microwave field driving a double quantum-dot in a resonator. We apply the results of our companion paper, which derives the complete set of fourth-order…

介观与纳米尺度物理 · 物理学 2017-02-01 Clemens Müller , Thomas M. Stace

We investigate the influence of the electron-phonon interaction on the decay dynamics of a quantum dot coupled to an optical microcavity. We show that the electron-phonon interaction has important consequences on the dynamics, especially…

介观与纳米尺度物理 · 物理学 2012-08-17 P. Kaer , T. R. Nielsen , P. Lodahl , A. -P. Jauho , J. Mork

This work demonstrates the unique approach of introducing divacancy imperfections in topological Stone-Wales type defected graphene quantum dots for harvesting both singlet and triplet excitons, essential for fabricating fluorescent organic…

介观与纳米尺度物理 · 物理学 2022-08-09 Tushima Basak , Tista Basak , Alok Shukla