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Generating correlated photons is an essential technology for photonic quantum information experiments. Increasing the generation efficiency of photon pairs via the enhancement of material nonlinearity is important for various applications including a near-on-demand single photon source based on multiplexed photon pair sources [1]. In this regard, photonic crystal nanocavities are attractive nonlinear...
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...
Microresonator Kerr frequency combs have the potential to revolutionize many aspects of modem technology (e.g. in precision metrology, spectroscopy, as well as telecommunications). In Kerr cavities, stable, low-noise, optical frequency combs often take the form of temporal cavity solitons (CSs): ultra-short optical pulses that persist in driven nonlinear resonators [1]. Recently, studies of CSs under...
The emerging field of topological photonics aims to realize photonic structures which are resilient to fabrication imperfections by utilizing ideas developed in topology[1]. In photonics, the topological phases are defined on the reciprocal space and usually are associated with the formation of topologically protected (TP) defect states within photonic band-gaps. In this endeavor the manipulation...
Temporal cavity solitons (CSs) are pulses of light that can persist in an optical cavity without any change to their shape or energy, and in the spectral domain correspond to highly coherent frequency combs. Cavity solitons were recently demonstrated for the first time in crystalline microresonators [1], and have subsequently been reported in a number of other resonator platforms [2-4], further establishing...
Dissipative Kerr-cavity temporal Solitons (DKS) are self-localized light pulses that can be excited in coherently-driven nonlinear optical resonators [1], enabling compact, coherent optical Kerr Frequency Combs (KFC) generation, which have numerous potential applications. Numerical studies based on the Lugiato-Lefever Equation (LLE) predicted that DKS can undergo breathing, i.e. periodic variations...
Temporal cavity solitons (CSs) are pulses of light that persist in coherently driven passive resonators [1], and they play a key role in fibre-based all-optical buffers [2] and coherent micro-resonator frequency combs [3]. They are typically explained as steady-state solutions of the mean-field Lugiato-Lefever equation (LLE), and predicted to correspond to unique attracting states. However, the LLE...
We present, for the first time, the results regarding the production of refractive index (RI) sensors, through the acousto-optic effect in tilted fiber Bragg gratings (TFBGs). The RI is analysed in detail when acoustic waves are turned on using saccharose solutions with different RI from 1.3327 to 1.4249.
Microchip resonator based on Nd:YVO4 with intracavity Er-Glass crystal for frequency stabilization of 1064 nm radiation is presented. Auxiliary 1.55μm beam is absorbed in Er-Glass what leads to resonator optical path-length changes by photothermal effect.
For obtaining a single frequency Q-switched laser output injecting a continuous wave single frequency master laser into a Q-switched laser is a commonly used technique [1]. For a stabilized injection seeding a Fast Fourier Transform (FFT) based single heterodyne beat signal technique will be presented.
Dual-frequency (DF) solid-state lasers provide very interesting characteristics for application in Radar-Lidar, metrology or microwave photonics systems. Indeed, such lasers sustaining the oscillation of two cross-polarized modes with different frequencies provide stable and tunable optically carried microwave beat-notes [1, 2]. Nevertheless, solid-state DF lasers suffer from resonant excess intensity...
Kerr optical frequency combs in high-Q microresonators [1] are attracting growing interest [23], especially after mode-locking via dissipative Kerr solitons (DKS) has been demonstrated on a variety of platforms [3, 4]. Such combs are a promising source for compact applications due to its potential advantages of low power consumption and possibility of chip integration. A traditional approach to obtaining...
In this contribution, we demonstrate that a periodic lattice of frequency-detuned and displaced resonant rods can suppress the THz extinction at the central resonant frequency, leading to an enhanced spectral window of near perfect transparency [1], as shown in Fig. 1(a). The system consists of a periodic lattice of metallic rods of two different sizes as shown in the inset of Fig. 1(a). Each of the...
We investigate theoretically and numerically the transport of light in a three-dimensional (3D) crystal of cavities inside a 3D inverse woodpile photonic crystal. This class of crystals consists of two perpendicular arrays of pores and has a very broad 3D photonic band gap. An individual point defect is formed by reducing the radius of two intersecting pores. An earlier study revealed that an isolated...
Quartz tuning forks (QTFs) have been successfully employed as piezoelectric optoacoustic transducers in a quartz enhanced photoacoustic spectroscopic sensor (QEPAS) for sensitive and selective gas sensing applications. Stainless tubes are acoustically coupled with the QTF and act as an acoustic micro-resonator (AmR) to confine the acoustic waves and enhance the QEPAS signal [1]. Very recently, we...
Micro- and nanolasers promise exciting findings at the interface between laserphysics and quantum optics. Because of their low mode volume, these nanophotonic devices exhibit the cavity quantum electrodynamical effect of high-β lasing, allowing for stable laser operation close above the lasing threshold, maintaining only hundreds or even only tens of photons inside their cavity. Up to now, studies...
Spin-polarized vertical-cavity surface-emitting lasers (spin-VCSELs) offer the opportunity to generate high frequency polarization modulation dynamics, potentially enabling ultrafast optical communications. We use pulsed circular polarized optical pumping, leading to a transient spin imbalance in the carrier-spin-photon system via the optical selection rules. This results in an oscillation in the...
The topology of a gapped band structure is characterised by a bulk invariant and is deeply related to the existence of gapless edge modes through a principle known as bulk-edge correspondence. This correspondence has allowed to evidence topological phases by probing edge properties. Nonetheless, some experiments based on optical lattices of cold atomic gases have reported the possibility to directly...
The efficient and reliable storage of quantum states plays a crucial role for the realization of quantum computation and communication. For example, in linear optics quantum computation as represented by the KLM scheme [1], quantum storage enables one to store intermediate “results” or to boost scalability and reliability of the computation. To employ quantum storage for quantum computation, the storage...
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