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We predict collective 'free-space' lasing in a dense nanoscopic emitter arrangement where dipole-dipole coupled atomic emitters synchronize their emission and exhibit lasing behavior without the need for an optical resonator. At the example…

Quantum Physics · Physics 2025-09-26 Anna Bychek , Raphael Holzinger , Helmut Ritsch

We investigate mode-locking processes in lasers displaying a variable degree of structural randomness, from standard optical cavities to multiple-scattering media. By employing methods mutuated from spin-glass theory, we analyze the…

Optics · Physics 2009-03-18 L. Leuzzi , C. Conti , V. Folli , L. Angelani , G. Ruocco

Computer simulations with Synopsys' Sentaurus TCAD of opto-electrical characteristics of separate-confinement heterostructure laser based on AlGaAs are used as an example to study the role of the width and depth of Quantum Well (QW) active…

Materials Science · Physics 2011-12-02 Zbigniew Koziol

A multimode model of a continuously pumped atom laser is shown to be unstable below a critical value of the scattering length. Above the critical scattering length, the atom laser reaches a steady state, the stability of which increases…

Condensed Matter · Physics 2009-11-07 S. A. Haine , J. J. Hope , N. P. Robins , C. M. Savage

A numerical modeling of the radiation emitted from a Luminescent dye embedded in a finite one-dimensional photonic crystal is presented. The Photonic Band Structure and the Photonic Density of States are derived using classical…

Optics · Physics 2010-12-30 J. Manzanares-Martinez , P. Castro-Garay

We investigate theoretically quantum effects of a cavity-atom system in which the upper two levels of a cascade-type three-level atom interact with a cavity field mode in the ultrastrong coupling regime. By exploiting the virtual photons…

Quantum Physics · Physics 2014-03-19 Jin-Feng Huang , C. K. Law

We study the collective emission of a beam of atomic dipoles into an optical cavity. Our focus lies on the effect of a finite detuning between the atomic transition frequency and the cavity resonance frequency. By developing a theoretical…

Quantum Physics · Physics 2021-11-24 Simon B. Jäger , Haonan Liu , John Cooper , Murray J. Holland

A major trend within the field of cavity QED is to boost the interaction strength between the cavity field and the atomic internal degrees of freedom of the trapped atom by decreasing the mode volume of the cavity. In such systems, it is…

Quantum Physics · Physics 2018-08-29 Lukas Neumeier , Darrick E. Chang

Random lasers with low spatial coherence have important potential applications in high quality imaging and displaying. Here, a random laser with tunable angular spectra is proposed and fabricated through directly coupling an asymmetric…

Optics · Physics 2021-10-08 Huihui Shen , Yaoxing Bian , Junyan Li , Weinian Liu , Hanyi Xue , Zhaona Wang

We formulate quantum optics to include frequency dependence in the modeling of optical networks. Entangled light pulses available for quantum cryptography are entangled not only in polarization but also, whether one wants it or not, in…

Quantum Physics · Physics 2009-09-29 John M. Myers

The lasing behavior of one dimensional GaAs nanobeam cavities with embedded InAs quantum dots is studied at room temperature. Lasing is observed throughout the quantum dot PL spectrum, and the wavelength dependence of the threshold is…

It was shown by a study of the incoherent part of the low-frequency resonance fluorescence spectrum of the polar quantum emitter driven by semiclassical external laser field and damped by non-squeezed vacuum reservoir that the emitted…

Quantum Physics · Physics 2021-12-23 Andrey V. Soldatov

We investigate the power-dependent photoluminescence spectra from a strongly coupled quantum dot-cavity system using a quantum master equation technique that accounts for incoherent pumping, pure dephasing, and fermion or boson statistics.…

Mesoscale and Nanoscale Physics · Physics 2013-05-31 P. Yao , P. K. Pathak , E. Illes , S. Hughes , S. Munch , S. Reitzenstein , P. Franeck , A. Loffler , T. Heindel , S. Höfling , L. Worschech , A. Forchel

We presented a detailed experimental study on lasing in GaAs microstadium with various shapes. Unlike most deformed microcavities, the lasing threshold varies non-monotonically with the major-to-minor-axis ratio of the stadium. Under…

Optics · Physics 2007-05-23 W. Fang , G. S. Solomon , H. Cao

The light force on particles trapped in the field of a high-Q cavity mode depends on the quantum state of field and particle. Different photon numbers generate different optical potentials anddifferent motional states induce different field…

Quantum Physics · Physics 2009-04-17 András Vukics , Wolfgang Niedenzu , Helmut Ritsch

We examine off-resonant light scattering from ultracold atoms in the quantum Hall regime. When the light scattering is spin dependent, we show that images formed in the far field can be used to distinguish states of the system. The spatial…

Quantum Gases · Physics 2011-11-14 James S. Douglas , Keith Burnett

In this paper, we consider the transmission characteristics of an optical cavity loaded with ultra cold atoms in a one dimensional optical lattice at absolute zero temperature. In particular, we consider the situation when the many body…

Quantum Gases · Physics 2015-04-17 Jasleen Lugani , K. Thyagarajan , Sankalpa Ghosh

We study spectral singularities of an infinite planar slab of homogeneous optically active material in focus of a thin lens under illumination of a Gaussian beam. We describe the field distribution of the Gaussian beam under this…

Optics · Physics 2022-12-14 Mehrdad Bavaghar , Rasoul Aalipour , Kazem Jamshidi-Ghaleh

We consider a laser-driven and dissipative system of two coupled cavities with Jaynes-Cummings nonlinearity. In particular, we investigate both incoherent and coherent laser driving, corresponding to different experimental situations. We…

Mesoscale and Nanoscale Physics · Physics 2011-02-28 Michael Knap , Enrico Arrigoni , Wolfgang von der Linden , Jared H. Cole

The self-organization of a Bose-Einstein condensate in a transversely pumped optical cavity is a process akin to crystallization: when pumped by a laser of sufficient intensity, the coupled matter and light fields evolve, spontaneously,…

Quantum Gases · Physics 2010-11-03 Sarang Gopalakrishnan , Benjamin L. Lev , Paul M. Goldbart