We show that a monolithic and compact vertical cavity laser with intracavity saturable absorber can emit short excitable pulses. These calibrated optical pulses be excited as response to an input perturbation whose amplitude is above certain threshold. Subnanosecond promising for applications novel all-optical devices information processing or logical gates.

We experimentally demonstrate excitability in a semiconductor two-dimensional photonic crystal. Excitability is nonlinear dynamical mechanism underlying pulselike responses to small perturbations systems possessing one stable state. show that band-edge crystal resonator exhibits class II excitability, resulting from the coupling between high-Q optical mode, charge-carrier density, and fast (sub-micros) thermal dynamics. In this context, critical slowing down of electro-optical dynamics close...

Bistability, excitability, and self-pulsing regimes in an InP-based two-dimensional (2D) photonic crystal nanocavity with quantum wells as active medium are investigated. A resonant cw beam is evanescently coupled into the cavity through a tapered microfiber. In such conditions, we show that exhibits class II which arises from competition between fast electronic nonlinear effect, given by carrier-induced refractive index change, slow thermal dynamics. Multiple perturbation-pulse experiments...

Optical microcavities with ultralong photon storage times are of central importance for integrated nanophotonics. To date, record quality (Q) factors up to 1011 have been measured in millimetric-size single-crystal whispering-gallery-mode (WGM) resonators, and 1010 silica or glass microresonators. We show that, by introducing slow-light effects an active WGM microresonator, it is possible enhance the lifetime several orders magnitude, thus circumventing both fabrication imperfections...

Recent studies on exceptional points (EPs) in non-Hermitian optical systems have revealed unique traits, including unidirectional invisibility, chiral mode switching and laser self-termination. In featuring gain/loss components, EPs are commonly accessed below the lasing threshold, i.e., linear regime. this work, we experimentally demonstrate that EP singularities coupled semiconductor nanolasers can be above where they become branch of a nonlinear dynamical system. Contrary to common belief...

We report on the first experimental observation of spontaneous mirror symmetry breaking (SSB) in coherently driven-dissipative coupled optical cavities. SSB is observed as spatial or Z_{2} between two symmetrically pumped and evanescently photonic crystal nanocavities, manifests itself random intensity localization one show that, a system featuring repulsive boson interactions (U>0), pure pitchfork bifurcation requires negative photon hopping energies (J<0), which we have realized our...

We analyze multi-longitudinal-mode semiconductor lasers experimentally. show that the intensity of each mode displays large amplitude oscillations but obeys a highly organized antiphase dynamics leading to an almost constant total output. For mode, regular switching is observed in megahertz range, while optical frequency as function time follows well defined sequence from blue red. Using multimode theoretical model, we identify four-wave mixing dominant mechanism at origin dynamics. The...

We demonstrate a large tuning of the coupling strength in Photonic Crystal molecules without changing inter-cavity distance.The key element for design is "photonic barrier engineering", where "potential barrier" formed by air-holes between two cavities.This consists hole radius central row barrier.As result we show, both numerically and experimentally, that wavelength splitting evanescently-coupled L3 cavities (three holes missing ΓK direction underlying triangular lattice) can be...

We generate an observable which relates the interspike time statistics in a noise driven excitable system with its phase space global properties. Experimental results from semiconductor laser optical feedback are analyzed within this framework.

Two coupled nanolasers exhibit a mode switching transition, theoretically described by beating limit cycle oscillations. Their decay rate is vanishingly small in the thermodynamic limit, i.e., when spontaneous emission noise tends to zero. We provide experimental statistical evidence of mesoscopic cycles ($\ensuremath{\sim}{10}^{3}$ intracavity photons). Specifically, we show that order parameter quantifying amplitude can be reconstructed from intensity statistics. observe maximum averaged...

We demonstrate experimentally all-optical bistable operation in an InP-based two-dimensional photonic crystal slab lying on top of a Bragg reflector. Bistability is obtained around 1550nm, using low group velocity mode at the band edge dispersion characteristic. The origin regime shown to be fast (275ps relaxation time), electronically induced nonlinear refraction index. A intensity threshold 4kW∕cm2 was observed, with contrast 65% between high and reflectivity states.

We report on the continuous-wave operation of a band edge laser at room temperature near 1.55 mum in an InGaAs/InP photonic crystal. A flat dispersion band-edge mode is used for surface normal operation. The crystal slab integrated onto Silicon chip by means Au/In bonding technology, which combines two advantages, efficient heat sinking and broad reflectivity.

Linear and non-linear thermo-optical dynamical regimes were investigated in a photonic crystal cavity. First, we have measured the thermal relaxation time an InP-based nano-cavity with quantum dots presence of optical pumping. The experimental method presented here allows one to obtain dynamics temperature nanocavity based on reflectivity measurements cw probe beam coupled through adiabatically tapered fiber. Characteristic times 1.0+/-0.2 micros 0.9+/-0.2 for heating cooling processes...

In this work, we investigate experimentally the excitable properties of a solid-state laser with an intracavity saturable absorber. The main test excitability is characterization system response to short-pulse external stimuli. We present original method excite by injecting light pulses into This technique avoids imposing frequency tuning between input and passive laser, which necessary condition for field injection. show that under certain conditions behaves as system. observed regime...

Micro- and nanoscale lasers that display superthermal intensity fluctuations could lead to novel applications in quantum information processing imaging techniques. Experiments demonstrate a new method for generating light using bimodal semiconductor nanolaser.

We propose a scheme to achieve controllable self-pulsing operation in semiconductor photonic-crystal nanolaser. The is based on coupling two asymmetric nanocavities and pumping only one of them. As result, either periodic or chaotic subnanosecond $Q$-switched pulses can emerge. A coupled-mode approach used model the system study bifurcation diagram. An experimental realization proposed basis evanescently coupled nanocavities.

We investigate the basic mechanism of nonlinear mode competition in two semiconductor-coupled nanocavities operating laser regime. For this, we study energy transfer between bonding (in-phase) and anti-bonding (out-of-phase) modes system formed by strongly coupled photonic crystal nanolasers. experimentally observe switching from blue-detuned to red-detuned as pump power is increased. A semi-classical description terms mean-field equations allows us explain this phenomenon stimulated...

Zero modes are symmetry protected ones whose energy eigenvalues have zero real parts. In Hermitian arrays, they arise as a consequence of the sublattice symmetry, implying that dark modes. non-Hermitian systems, naturally emerge in gain/loss optical cavities, particle-hole prevails instead; resulting no longer but feature $π/2$ phase jumps between adjacent cavities. Here we report on direct observation three coupled photonic crystal nanocavity array containing quantum wells. Unlike...

We address, both experimentally and theoretically, phase amplitude dynamics of the electromagnetic field in a two-dimensional photonic crystal when femtosecond pulses are injected. demonstrate that usual adiabatic approximation underlying carriers semiconductor resonator is no longer valid, since general photon lifetime cannot be neglected with respect to carrier recombination lifetime. Parameter regions where adiabaticity broken shown, ubiquity observed dynamical scenario new generation...

Band-edge photonic crystal lasers were fabricated and their temporal characteristics minutely analyzed using a high resolution up-conversion system. The InGaAs/InP laser operates at room temperature 1.55 microm with turn on time ranging from 17ps to 30ps.

In this letter, we report the realization and characterization of a planar two-dimensional organic photonic crystal microcavity laser. The gain medium consists tris(8-hydroxyquinolinato) aluminum doped with 4-(dicyanomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran is deposited on lithographically patterned silicon nitride two dimensional H2 microcavity. experimental results show laser emission at 662 nm threshold 9.7 μJ/cm2.

We demonstrate an easy-to-implement scheme for fluorescence enhancement and observation volume reduction using photonic crystals (PhCs) as substrates microscopy. By normal incidence coupling to slow 2D-PhC guided modes, a 65 fold in the excitation is achieved near field region (100 nm deep 1 microm wide) of resonant mode. Such large together with high spatial resolution makes this device excellent substrate microscopies.

We report on far field measurements two coupled photonic crystal nanocavities. The distinct features of the antisymmetric modes (minima intensity at zero-emission angles) allow us to demonstrate a π-phase difference between cavity fields, clear signature evanescent coupling. Good agreement experimental results and simulated radiation patterns has been found.

We report on far-field measurements of L3 photonic crystal (PhC) cavities with high quality beaming. This is achieved by means the so-called "band folding" technique, in which a modulation radius specific holes surrounding cavity introduced. Far-field patterns are measured from photoluminescence quantum wells embedded PhC. A very good agreement between experimental results and simulated radiation has been found. Laser effect demonstrated beaming threshold comparable to regular one. In...