Photonic qubits should be controllable on-chip and noise-tolerant when transmitted over optical networks for practical applications. Furthermore, qubit sources programmable have high brightness to useful quantum algorithms grant resilience losses. However, widespread encoding schemes only combine at most two of these properties. Here, we overcome this hurdle by demonstrating a silicon nano-photonic chip generating frequency-bin entangled photons, an scheme compatible with long-range...

In recent years, silicon nitride (SiN) has drawn attention for the realisation of integrated photonic devices due to its fabrication flexibility and advantageous intrinsic properties that can be tailored fulfill requirements different linear non-linear applications. This paper focuses on our progress in demonstration enhanced functionalities near infrared wavelength regime with low temperature (<;350 °C) SiN platform. It discusses (de)multiplexing devices, nonlinear all optical conversion,...

Abstract Nonlinear epsilon-near-zero (ENZ) nanodevices featuring vanishing permittivity and CMOS-compatibility are attractive solutions for large-scale-integrated systems-on-chips. Such confined systems with unavoidable heat generation impose critical challenges semiconductor-based ENZ performances. While their optical properties temperature-sensitive, there is no systematic analysis on such crucial dependence. Here, we experimentally report the linear nonlinear thermo-optic effects in...

We demonstrate an integrated source of frequency-entangled photon pairs on a silicon photonics chip. The emitter has coincidence-to-accidental ratio exceeding 103. prove entanglement by showing two-photon frequency interference with visibility 94.6% ± 1.1%. This result opens the possibility on-chip integration frequency-bin sources modulators and other active passive devices available in platform.

Integrated quantum photonics leverages the on-chip generation of nonclassical states light to realize key functionalities devices. Typically, such relies on whispering gallery mode resonators, as integrated optical micro-rings, which enhance efficiency underlying spontaneous nonlinear processes. While these kinds resonators excel in maximizing either temporal confinement or spatial overlap between different resonant modes, they are usually associated with large volumes, imposing an intrinsic...

Abstract Realizing multiply resonant photonic crystal cavities with large free spectral range is key to achieve integrated devices highly efficient nonlinear response, such as frequency conversion, four-wave mixing, and parametric oscillation. This task typically difficult owing the cavity modes’ sensitivity fabrication disorder, which makes it hard reliably a comb-like spectrum of equally spaced modes even when perfect matching theoretically predicted. Here we show that up eight very high...

We report the resonantly enhanced radiative emission from a single SiGe quantum dot (QD), which is deterministically embedded into bichromatic photonic crystal resonator (PhCR) at position of its largest modal electric field by scalable method. By optimizing our molecular beam epitaxy (MBE) growth technique, we were able to reduce amount Ge within whole obtain an absolute minimum exactly one QD, accurately positioned lithographic methods relative PhCR, and otherwise flat, few monolayer thin,...

Abstract Controlling the optical response of a medium through suitably tuned coherent electromagnetic fields is highly relevant in number potential applications, from all-optical modulators to storage devices. In particular, electromagnetically induced transparency (EIT) an established phenomenon which destructive quantum interference creates window over narrow spectral range around absorption line, which, turn, allows slow and ultimately stop light due anomalous refractive index dispersion....

Chip-scale optical frequency combs enable the generation of highly-coherent pulsed light at gigahertz-level repetition rates, with potential technological impact ranging from telecommunications to sensing and spectroscopy. In combination techniques such as dual-comb spectroscopy, their utilization would be particularly beneficial for molecular species in mid-infrared spectrum, an integrated fashion. However, few demonstrations direct microcomb within this spectral region have been showcased...

In this work, we demonstrate a new way to perform classical multiparty computing amongst parties with limited computational resources. Our method harnesses quantum resources increase the power of individual parties. We show how set clients restricted linear processing are able jointly compute non-linear multivariable function that lies beyond their capabilities. The only allowed XOR gates and single-qubit on states. also examine type security can be achieved in setting. Finally, provide...

Ultrahigh-Q Photonic Crystal cavities were realized in a suspended Silicon Rich Nitride (SiNx) platform for applications at telecom wavelengths. Using line width modulated cavity design we achieved simulated Q of 520,000 with modal volume 0.77(λ/n)3. The fabricated measured using the resonance scattering technique and demonstrated 120,000. experimental spectra different input power also indicate that non-linear losses are negligible this material platform.

The wavelength scale confinement of light offered by photonic crystal (PhC) cavities is one the fundamental features on which many important on-chip components are based, opening silicon photonics to a wide range applications from telecommunications sensing. This trapping in small space also greatly enhances optical nonlinearities and potential build these enhanced light-matter interactions. In order use PhCs effectively for this purpose it necessary fully understand nonlinear dynamics...

Second harmonic generation in nonlinear materials can be greatly enhanced by realizing doubly-resonant cavities with high quality factors. However, fulfilling such doubly resonant condition photonic crystal (PhC) is a long-standing challenge, because of the difficulty engineering bandgaps around both frequencies. Here, implementing second-harmonic bound state continuum (BIC) and confining it heterostructure design, we show first PhC slab cavity $2.4\times10^{-2}$ W$^{-1}$ conversion...

We report second and third harmonic generation in photonic crystal cavities fabricated a suspended silicon-rich nitride membrane under resonant continuous-wave excitation at telecom wavelength. Two-dimensional with far-field optimized line-width modulated design were employed. A quality factor fundamental wavelength as high Q = 1.3 × 104 coupling efficiency ηc ≈ 30% enabled us to exploit the cavity field enhancement achieve efficiencies ρSH (4.7 ± 0.2) 10−7 W−1 ρTH (5.9 0.3) 10−5 W−2. The...

We present a novel device consisting of two microring resonators coupled by the second-order nonlinear interaction. By independently controlling microresonators’ linear properties, we engineer efficient second-harmonic generation through photo-induced nonlinearity in silicon nitride.

Abstract Establishing relations between fundamental effects in far‐flung areas of physics is a subject great interest the current research. Realization novel photonic system akin to radio‐frequency superconducting quantum interference device (RF‐SQUID), fiber laser cavity with epsilon‐near‐zero (ENZ) nanolayers as intra‐cavity components reported here. Emulating RF‐SQUID scheme, counterpart supercurrent, represented by optical wave, circulates cavity, passing through effective potential...

Abstract Temporal Talbot effect, the intriguing phenomenon of self-imaging optical pulse trains, is extensively investigated using macroscopic components. However, ability to manipulate either bright or dark, through effect on integrated photonic chips replace bulky instruments has rarely been reported. Here, we design and experimentally demonstrate a proof-of-principle silicon nitride device capable imprinting phase relation onto in-phase combs generating two-fold self-images at output. We...

Second-harmonic generation allows for coherently bridging distant regions of the optical spectrum, with applications ranging from laser technology to self-referencing frequency combs. However, accessing nonlinear response a medium typically requires high-power bulk sources, specific crystals, and complex setups, hindering path toward large-scale integration. Here we address all these issues by engineering chip-scale second-harmonic (SH) source based on doubling semiconductor...

We present a narrow-linewidth second-harmonic source based on laser diode injection locked to an optically poled silicon nitride microresonator. The device is compact, highly-coherent dual-wavelength source, with high conversion efficiency up 280%/W.

We show how a strongly driven single-mode oscillator coupled to first-order dynamical system gives rise induced absorption or gain of weak probe beam, and associated fast slow light depending on the detuning conditions. derive analytic solutions dynamic equations motion, showing that electromagnetically transparency (EIT) like response is general phenomenology, potentially occurring in any nonlinear systems. The resulting group delay (or advance) fundamentally determined by damping rate. To...

On-chip coherent light generation has wide-ranging applications in metrology, spectroscopy, quantum optics, etc. In this study, we demonstrate the of from a silicon-nitride microring resonator using cascaded nonlinear processes. This involves telecom pump laser and its efficiently generated second harmonic through photogalvanic effect. By leveraging second- third-order effects such as generation, (stimulated) four-wave mixing, optical parametric oscillation, achieve UV, visible,...

Summary Distributed acoustic sensing using fiber optics (FO) cables deployed horizontally on the surface or seabed (we define this as S-DAS configuration) is a novel technology with potential to become cost-effective alternative conventional towed streamer and ocean-bottom node seismic surveying. Robustness cost effectiveness of FO sensors generate an attractive value proposition for many monitoring applications. A relatively unexplored aspect ability use passive interferometry subsurface...