Abstract Lithium niobate on insulator is being established as a versatile platform for new generation of photonic integrated devices. Extensive progress has been made in recent years to improve the fabrication optical circuits from research towards wafer-scale commercial foundries, and losses have reached remarkably low values approaching material limits. In this context, argon etching lithium waveguides shown provide best quality, yet process still challenging optimise due its physical...

Abstract Miniaturised optical spectrometers are attractive due to their small footprint, low weight, robustness and stability even in harsh environments such as space or industrial facilities. We report on a stationary-wave integrated Fourier-transform spectrometer featuring measured bandwidth of 325 nm theoretical spectral resolution 1.2 nm. fabricate test lithium niobate-on-insulator take full advantage the platform, namely electro-optic modulation, broad transparency range loss achieved...

Phase shifters are key components of large-scale photonic integrated circuits. For the lithium niobate-on-insulator (LNOI) platform, thermo-optic phase (TOPS) have emerged as a more stable and compact alternative to common electro-optic (EOPSs), which prone anomalous behavior drifting at low frequencies. Here, we model experimentally characterize influence geometry on performance metal strip TOPSs. Compared EOPSs, 10-fold reduction voltage-length product is measured bandwidths beyond 100 kHz...

The generation of photon pairs from nanoscale structures with high rates is still a challenge for the integration quantum devices, as it suffers parasitic signals substrate. In this work, we report type-0 spontaneous parametric down-conversion at 1550 nm individual bottom-up grown zinc-blende GaAs nanowires lengths up to 5 μm and diameters 450 nm. were deposited on transparent ITO substrate, measured background-free coincidence rate 0.05 Hz in Hanbury-Brown-Twiss setup. Taking into account...

Nonclassical light sources are highly sought-after as they an integral part of quantum communication and computation devices. Typical use bulk nonlinear crystals that rely on stringent phase-matching conditions, limiting the operating wavelength bandwidth. In this work, we demonstrate generation photon pairs from a free-standing lithium niobate microcube at telecommunication 1.56 µm through spontaneous parametric down-conversion process. The maximum pair rate obtained single with size 3.6 is...

Abstract Programmable interferometric circuits are at the heart of integrated quantum photonic processors. While lithium niobate-on-insulator platform has potential to advance photonics due its strong nonlinearity and tight mode confinement, demonstration reconfigurable two-photon interference not yet been achieved. Here, we design, fabricate characterize building block such networks in form a 2 × Mach–Zehnder Interferometer. We use thermo-optic phase shifter achieve stable performance with...

Intensity modulators are fundamental components for integrated photonics. From near-infrared (NIR) to visible spectral ranges, they find applications in optical communication and quantum technologies. In particular, required the control manipulation of atomic systems such as clocks computers. Typical electro-optic operating at these wavelengths show high bandwidth low-voltage operation, but their extinction ratios moderate. Here we present an thin-film lithium niobate (EO) modulator C-band,...

This paper focuses on the practical implementation of a Cloud-RAN architecture in context future 5G systems, with particular emphasis different aspects functional split between cloud platform and radio access points. First, we provide comprehensive overview how hardware options impact RAN functionality. We further discuss virtualized infrastructure which may have significant algorithms are implemented, they interact each other, can be scaled within RAN. also analyze constraints to considered...

Sensors are a major component in any experimental set-up. In high-voltage environment, the aspect of safety must be particularly emphasized and galvanic isolation is often provided by an optical communication link between "electric-sensor" "detection-unit". However, transformation electrical to signals back can introduce delays errors. To mitigate this, electric fields were directly measured with in-house fabricated sensor chip, based on lithium niobate. On one hand we locally electrodes...

Generating and interfering non-classical states of light is fundamental to optical quantum information science technology. Quantum photonic integrated circuits provide one pathway towards scalability by combining nonlinear sources programmable in centimeter-scale devices. The key requirements for applications include efficient generation indistinguishable photon-pairs high-visibility interference. Here, we demonstrate a lithium niobate-on-insulator (LNOI) circuit that generates two-photon...

Optical quantum communication technologies are making the prospect of unconditionally secure and efficient information transfer a reality. The possibility generating reliably detecting states light, with further need increasing private data-rate is where most research efforts focusing. physical concept entanglement solution guaranteeing highest degree security in device-independent schemes, yet its implementation preservation over long links hard to achieve. Lithium niobate-on-insulator has...

Nonclassical light sources are highly sought after as they an integral part of quantum communication and computation devices. Typical rely on bulk crystals that not compact have limited bandwidth due to phase-matching conditions. In this work, we demonstrate the generation photon pairs from a free-standing lithium niobate microcube at telecommunication wavelength through spontaneous parametric down-conversion process. The maximum pair rate obtained single with size ~4 microns is ~80 Hz,...

Argon ion etching of lithium niobate on insulator (LNOI) in an inductively coupled plasma (ICP) system has so far shown the best optical quality devices context integrated photonics due to polishing character argon process [1–3]. However, micromasking from material redeposition and chamber contamination introduced during (Fig. 1(A)) close one etch selectivity for deep etches still make it a challenging process. Comprehensive studies have already been conducted LNOI, showing linearity...

A self-consistent quantum transport simulation framework incorporating electron-electron and electron-photon interactions from first-principles is presented. It relies on density functional theory (DFT), the Non-equilibrium Green's function (NEGF) formalism, GW approximation to account for many-body effects. As application, a bulk-like InAs structure, configured both as n-type resistor p-i-n photo-diode, considered. We demonstrate that developed approach can deliver accurate, beyond-DFT band...

Intensity modulators are fundamental components for integrated photonics. From near infrared to visible spectral ranges, they find applications in optical communication and quantum technologies. In particular, required the control manipulation of atomic systems such as clocks computers. Typical electro-optic operating at these wavelengths show high bandwidth low voltage operation, but their extinction ratios moderate. Here we present an thin-film lithium niobate modulator C-band, which uses...

Optical quantum communication technologies are making the prospect of unconditionally secure and efficient information transfer a reality. The possibility generating reliably detecting states light, with further need increasing private data-rate is where most research efforts focusing. physical concept entanglement solution guaranteeing highest degree security in device-independent schemes, yet its implementation preservation over long links hard to achieve. Lithium niobate-on-insulator has...

Spontaneous parametric down-conversion (SPDC) is one of the most efficient sources for quantum emitters, which holds promise numerous applications in key distribution [1] , computing [2] and networks [3] . Despite its vast potential yet simple measurement setup, applicability SPDC still limited due to their modest conversion efficiency. Therefore, many attempts have been made improve efficiency process, but mainly focused on phase-matched regime relied upon use macroscopic birefringent...

Integrated photonics is becoming more and multifunctional thanks to the recent availability of an established material, lithium niobate, as thin films less than 1 micron thickness. Overcoming key fabrication challenges has put this platform on its way achieve scalability. Here, we show performances integrated free space devices such electrooptic modulators active metasurfaces. Finally, mention possible roles niobate insulator in quantum photonics.

We present a graph-based model for multiple scattering of light in integrated lithium niobate on insulator (LNOI) networks, which describes an open network single-mode waveguides with tunable at the nodes. first validate small scale experimental LNOI resonator devices and show consistent agreement between simulated measured spectral data. Then, is used to demonstrate novel platform on-chip large-scale optical networks up few hundred nodes, behaviour tailored disorder. Combining our simple...

We present a stationary-wave Fourier-transform spectrometer monolithically integrated on lithium niobate-on-insulator photonic circuits, with resolution of 2.53 nm and an optical bandwidth limited solely by the waveguide single-mode condition.