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Hybrid lead halide perovskites, such as methylammonium lead halides CH3NH3PbX3 (MAPbX3, X = I, Br, Cl), are emerging as an excellent class of materials for various optoelectronic applications including solar cells, light-emitting diodes, lasers, and photodetectors [1,2]. As for these perovskite-based devices, deep understanding of transport properties of excitons and charge carriers in perovskite...
The latest advances in the design and implementation of semiconductor sources of quantum light show their competence to efficiently deliver indistingishable single photons [1-3] or photon pairs with high degree of entanglement [4-5]. These achievements combined with the possibility of photon storage [6] show the potential of quantum dots to become building blocks of a quantum network.
It is commonly understood that, to cast light into a state with sub-Poissonian statistics, a strong optical nonlinearity is needed. The most common examples are resonance fluorescence of a two-level system, or a Kerr medium where the Kerr energy per photon U is much larger than the optical linewidth κ. In both cases, a single-photon nonlinearity is realized, whereby the presence of a single photon...
In the early 1950s, Fermi, Pasta and Ulam (FPU) published a seminal report in which they numerically investigated the dynamics of a one-dimensional anharmonic chains of particles [1]. They argued that, owing to the nonlinear coupling, the system would irreversibly relax to a state of thermal equilibrium, in which the energy is equidistributed among all modes. Instead of such a thermalization process,...
Making use of the attractive properties of silicon (Si), a wide array of highly functional photonic devices have been demonstrated over the past few decades [1]. Although planar platforms are still the most prominent choice for integrated systems, more recently silicon fibres have gained increased attention due to their simple fabrication methods and flexible device designs [2]. However, despite their...
Graphene plasmonics is a promising building block for high speed communication devices that takes advantage of strong confinement of the electromagnetic energy at sub-wavelength scales, tunable via charge carrier density through a gate voltage.[1] The fabrication of integrated optoelectronic devices based on graphene plasmons however is extremely challenging, and launching and conveying graphene plasmons...
Surface plasmons resonances occur when a metallic nano-particle is excited by an external electric field. Within the quasi-static limit, Ouyang and Isaacson [1] have shown that the plasmon modes are the solutions of an eigenvalue problem. This boundary element method (BEM) [2] has been extensively used to compute nano-particle plasmon resonances [3,4]. Depending on the geometry of the particle, the...
Solving large optimization problems lies at heart of modem science and technology from social sciences to technological applications, i.e. protein design [1]. Recently, we proposed a new platform for an analog Hamiltonian simulator based on polariton graphs [2], which benefit from continuous read-out and single site control. Ability to control and engineer a wide range of strengths of coupling interactions...
In a DBR microcavity with quantum wells embedded, strong coupling between excitons inside the quantum wells with the microcavity photons results in a new particle called exciton polariton. These bosonic particles are partly light and partly matter, thus they can be seen as an effective nonlinearity for light. Because of their bosonic lightweight nature, stimulated scattering into a certain state occurs...
Ultra-strong light-matter interactions can be realized in various physical systems and has thus attracted many experimental and theoretical investigations [1-4]. One possible realization is to couple strongly subwavelength split ring resonators (SRR) to the Landau level transition of a two dimensional electron (or hole) gas [2, 3]. In a previous work on parabolic AlGaAs/GaAs QWs, we showed that very...
We have realized a hybrid opto-electro-mechanical system [1], consisting of a radiofrequency (rf) resonato: capacitively coupled to a nanomechanical membrane, and read-out at the shot noise level by an optica interferometer. The oscillation of the mechanical resonator can alter the capacitance of the radiofrequency resonator leading to the modulation of transmitted signal. In our setup the rf resonator...
Lithium niobate whispering-gallery resonators (WGRs) show high intensity enhancement due to small mode volumes and high Q-factors. With bulk WGRs, shaped by diamond-blade-cutting tools followed by surface polishing, Q-factors in the range of 1011 have been demonstrated, which make them of significant interest for e.g. nonlinear-optical frequency conversion [1]. However, WGRs are still rare in commercial...
Yb:YAG thin-disk (TD) oscillators are able to deliver energetic femtosecond pulses without external amplification at hundreds of watts average power and MHz repetition rates [1, 2]. Such compact, high-power, low-noise sources are beneficial for scientific experiments and industrial micromachining. They also serve as a great starting point for spectral broadening, which allows transferring their power...
Strong interaction between two single photons [1], is a long standing and important goal in quantum photonics. This would enable a new regime of nonlinear optics and unlock several applications in quantum information science, including photon-photon gates and deterministic Bell-state measurements for quantum networking. In the context of quantum networks [2], a particularly important case is to achieve...
Controlling the interaction of light and matter is the basis for diverse applications ranging from light technology to quantum information processing. Nowadays, many of these applications are based on nanophotonic structures. It turns out that the confinement of light in such nanostructures imposes an inherent link between its local polarization and its propagation direction, also referred to as spin-momentum...
We report the formation of hybrid states of H-aggregates of organic self-assembled aromatic polycyclic molecules (PTCDI-C7) and surface plasmons polaritons (SPP). Strong coupling has already been reported in molecular systems in a number of studies [1], for the most part in J-aggregates [2]. In our system, we consider an ultra-dense layer of self organised PTCDI-C7 molecules forming H-aggregates with...
Entangled photon pair is key factor for realization of quantum communication, quantum information, etc. For long distance quantum communication, it is necessary to generate narrow band biphoton for interaction with atomic based quantum memory. In recent years, generation of time-frequency entangled photon pairs based on spontaneous four-wave mixing (SFWM) process in atomic ensemble have been reported...
Within recent years many ultra-short pulsed lasers with extremely high pulse energies as well as average powers were developed for laser material processing. To flexibly guide the beam from the laser to the workpiece hollow-core photonic crystal fibers (HC-PCF) have shown to be the best and unique choice to deliver these high peak power pulses. Also it has been reported that to largely reduce the...
Mechanically interlocked molecules represent chemical architectures whose composing elements are linked because of their topology instead of covalent bonds [1]. Among them, the catenanes are analogous to an ensemble of interlaced rings, globally locked yet locally independent. We disclose in this work the equivalent of such exotic molecules in the realm of nonlinear Photonics. They appear as interlocked...
While further increasing the capacity of the SSMF is bounded by the nonlinear Shannon Limit, the annual traffic growth already exceeds the growth of the transmission capacity. In the nearest years, new traffic demands can only be accommodated by lighting a new fiber leading to a linear increase of the cost per bit. The development of communication systems based on multi-mode fibers is considered as...
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