We propose a photonic crystal nanocavity design with self-similar electromagnetic boundary conditions, achieving ultrasmall mode volume (Veff). The electric energy density of cavity can be maximized in the air or dielectric region, depending on choice conditions. illustrate concept silicon-air one-dimensional photon that reaches an Veff∼7.01×10−5λ3 at λ∼1550 nm. show extreme light concentration our enable ultrastrong Kerr nonlinearities, even single-photon level. These features open new...

We present a simple and robust structure for realizing asymmetric Fano transmission characteristics in photonic crystal waveguide-cavity structures. The use of resonances optical switching is analyzed using temporal coupled mode theory combination with three-dimensional finite difference time domain simulations taking into account the signal bandwidth. results suggest significant energy reduction by employing compared to more well established Lorentzian resonance A specific example Kerr...

We suggest and analyze a laser with mirror realized by Fano interference between waveguide nanocavity. For small-amplitude modulation of the nanocavity resonance, can be modulated at frequencies exceeding 1 THz, not being limited carrier dynamics as for conventional lasers. larger modulation, transition from pure frequency to generation ultrashort pulses is observed. The analyzed generalizing field equation lasers account dynamical mirror, described coupled mode theory.

Fano resonances appear in quantum mechanical as well classical systems a result of the interference between two paths: one involving discrete resonance and other continuum. Compared to conventional resonance, characterized by Lorentzian spectral response, characteristic asymmetric sharp response is suggested enable photonic switches sensors with superior characteristics. While experimental demonstrations appearance have been made both plasmonic photonic-crystal structures, control these...

We show that relatively simple integrated photonic circuits have the potential to realize a high fidelity deterministic controlled-phase gate between qubits using bulk optical nonlinearities. The is enabled by converting travelling continuous-mode photons into stationary cavity modes strong classical control fields dynamically change effective cavity-waveguide coupling rate. This architecture succeeds because it reduces wave packet distortions otherwise accompany action of nonlinearities [J....

Twisted light with orbital angular momentum (OAM) has been extensively studied for applications in quantum and classical communications, microscopy, optical micromanipulation. Ejecting high states of a whispering gallery mode (WGM) microresonator through grating-assisted mechanism provides scalable, chip-integrated solution OAM generation. However, demonstrated microresonators have exhibited much lower quality factor (Q) than conventional WGM resonators (by >100×), an understanding the...

The dynamical properties of an InP photonic crystal nanocavity are experimentally investigated using pump-probe techniques and compared to simulations based on coupled-mode theory.Excellent agreement between experimental results is obtained when employing a rate equation model containing three time constants, that we interpret as the effects fast carrier diffusion from initially localized distribution slower surface recombination bulk recombination.The variation constants with parameters...

We propose to use graphene-based Josephson junctions (gJjs) detect single photons in a wide electromagnetic spectrum from visible radio frequencies. Our approach takes advantage of the exceptionally low electronic heat capacity monolayer graphene and its constricted thermal conductance phonon degrees freedom. Such system could provide high sensitivity photon detection required for research areas including quantum information processing radio-astronomy. As an example, we present our device...

We propose a scheme for optical entanglement distribution in quantum networks based on quasi-deterministic entangled photon pair source. By combining heralded photonic Bell generation with spectral mode conversion to interface memories, the eliminates switching losses due multiplexing. analyze this `zero-added-loss multiplexing' (ZALM) source particularly challenging problem of long-baseline via satellites and ground-based where it unlocks additional advantages: (i) substantially higher...

We demonstrate that the inherent nonlinearity of a microstructured optical fiber (MOF) may be used to achieve label-free selective biosensing, thereby eliminating need for post-processing fiber. This first nonlinear biosensor utilizes change in modulational instability (MI) gain spectrum (a shift Stokes- or anti-Stokes wavelength) caused by capture biomolecules sensor layer immobilised on walls holes find such changes MI can made detectable, and engineering dispersion is important optimizing...

Light propagation in systems of optical cavities coupled to waveguides can be conveniently described by a general rate equation model known as (temporal) mode theory (CMT). We present an alternative derivation the CMT for cavity-waveguide structures, which explicitly relies on treatment cavity modes quasi-normal with properties that are distinctly different from those waveguides. The two families via field equivalence principle provide physically appealing yet surprisingly accurate...

We study theoretically the interaction between two photons in a nonlinear cavity. The are absorbed into cavity by an effective tuning of its input-output coupling via external control to second, strongly output-coupled mode. Such ``dynamically coupled'' cavities, which can be implemented using bulk ${\ensuremath{\chi}}^{(2)}$ and ${\ensuremath{\chi}}^{(3)}$ nonlinearities, enable incoming photon wave packets with high fidelity when duration is similar that packets. Further, this...

We demonstrate a large-scale tunable-coupling ring resonator array, suitable for high-dimensional classical and quantum transforms, in CMOS-compatible silicon photonics platform. The device consists of waveguide coupled to 15 ring-based dispersive elements with programmable linewidths resonance frequencies. ability control both quality factor frequency each provides an unprecedented 30 degrees freedom dispersion on single spatial channel. This system has range applications, including...

Using a sensitive two-color heterodyne pump-probe technique, we investigate the carrier dynamics of an InP photonic crystal nanocavity. The technique provides unambiguous results for all wavelength configurations, including degenerate case, which cannot be investigated with widely used homodyne technique. A model based on coupled mode theory two distributions is introduced to account relaxation dynamics, assumed governed by both diffusion and recombination.

We report the first theoretical investigation of passive mode-locking in photonic crystal mode-locked lasers.Related work has investigated coupled-resonator-optical-waveguide structures regime active [Opt.Express 13, 4539-4553 (2005)].An extensive numerical influence key parameters sections and cavity on laser performance is presented.The results show possibility generating stable high quality pulses a large parameter region.For optimized dispersion properties waveguide cavity, have sub...

We report the design and fabrication of a four-port InP photonic crystal cavity-waveguide structure in which two crossing waveguides intersect cavity. Transmission measurements show that by exploiting mode-gap effects, high cross-talk suppression between can be obtained. In addition, couple to distinct cavity resonances with different quality-factors as well small mode volumes. This is promising for realizing ultra-fast, low-energy optical switches or memories.

Towards building large-scale integrated photonic systems for quantum information processing, spatial and spectral alignment of single to nanocavities is required.Here, we demonstrate spatially targeted implantation nitrogen vacancy (NV) centers into the mode maximum 2-d diamond crystal cavities with quality factors up 8000, achieving an average 1.1 ± 0.2 NVs per cavity.Nearly all NV-cavity have significant emission intensity enhancement, reaching a cavity-fed spectrally selective F int ,...

We investigate the symmetry of transmission spectra in a photonic crystal (PhC) waveguide with side-coupled cavity and partially transmitting element (PTE). demonstrate, through numerical calculations, that by varying cavity-PTE distance vary from being asymmetric minimum blueshifted relative to maximum, symmetric (Lorentzian), redshifted maximum. For distances larger than five PhC lattice constants, we show spectrum is accurately described as Fabry-Perot etalon single propagating Bloch mode...

Abstract We propose an architecture for achieving high-fidelity deterministic quantum logic gates on dual-rail encoded photonic qubits by letting photons interact with a two-level emitter (TLE) inside optical cavity. The photon wave packets that define the qubit are preserved after interaction due to control process actively loads and unloads from cavity dynamically alters their effective coupling TLE. controls rely nonlinear mixing between modes enhanced strong externally modulated...

The performance of all-optical switches is a compromise between the achievable bandwidth switched signal and energy requirement switching operation. In this work we consider system consisting photonic crystal cavity coupled to two input output waveguides. As specific example application, investigate demultiplexing an optical time division multiplexed signal. To quantify energy-bandwidth trade-off, introduce figure merit for detection demultiplexed such investigations it crucial patterning...

We investigate the origin of imperfections in fidelity a two-photon controlled-phase gate based on two-level-emitter nonlinearities. focus passive system that operates without external modulations to enhance its performance. demonstrate is limited by opposing requirements input pulse width for one- and two-photon-scattering events. For one-photon scattering, spectral must be narrow compared with emitter linewidth, while processes require linewidth comparable. find these limit maximum $84%$...

Abstract Recent progress in nonlinear optical materials and microresonators has brought quantum computing with bulk nonlinearities into the realm of possibility. This platform is great interest, not only because photonics an obvious choice for networks, but also as a promising route to information processing at room temperature. We propose approach reprogrammable room-temperature photonic logic that significantly simplifies realization various circuits, particular, error correction. The key...

Wavelength conversion of a 10-Gb/s (9.35 Gb/s net rate) return-to-zero ON-OFF keying signal is demonstrated using simple InP photonic crystal H0 nanocavity with Lorentzian line shape. The shifting the resonance induced by generation free-carriers enables pump intensity modulation to be transferred continuous-wave probe sufficiently high quality so that converted can detected conventional telecommunication receiver. A clear eye diagram observed for showing pre-forward error correction...