Ultra-compact, densely integrated optical components manufactured on a CMOS-foundry platform are highly desirable for information processing and electronic-photonic co-integration. However, the large spatial extent of evanescent waves arising from nanoscale confinement, ubiquitous in silicon photonic devices, causes significant cross-talk scattering loss. Here, we demonstrate that anisotropic all-dielectric metamaterials open new degree freedom total internal reflection to shorten decay...

Strong amplification in integrated photonics is one of the most desired optical functionalities for computing, communications, sensing, and quantum information processing. Semiconductor gain cubic nonlinearities, such as four-wave mixing stimulated Raman Brillouin scattering, have been among studied mechanisms on chip. Alternatively, material platforms with strong quadratic nonlinearities promise numerous advantages respect to bandwidth, which nanophotonic lithium niobate promising...

The integration of nanoscale electronics with conventional optical devices is restricted by the diffraction limit light. Metals can confine light at subwavelength scales needed, but they are lossy, while dielectric materials do not evanescent waves outside a waveguide or resonator, leading to cross talk between components. We introduce paradigm shift in confinement strategy and show that be confined below using completely transparent artificial media. Our approach relies on controlling...

Spectral behaviors of photonic resonators have been the basis for a range fundamental studies, with applications in classical and quantum technologies. Driven nonlinear provide fertile ground phenomena related to phase transitions far from equilibrium, which can open opportunities unattainable their linear counterparts. Here, we show that optical parametric oscillators (OPOs) undergo second-order spectral domain between degenerate non-degenerate regimes. This abrupt change response follows...

Engineered non-Hermitian systems featuring exceptional points (EPs) can lead to a host of extraordinary phenomena in diverse fields ranging from photonics, acoustics, opto-mechanics, and electronics atomic physics. In optics, dynamics are typically realized using dissipation phase-insensitive gain accompanied by unavoidable fluctuations. Here, we introduce coupled optical parametric oscillators (OPOs) arising phase-sensitive amplification de-amplification, show their distinct advantages over...

Miniaturized circular patch antennas loaded by helices, which operate as μ-negative (MNG) metamaterials, is reported. Two having different helix parameters have been fabricated. The radius for both 42 mm. first fabricated antenna shows a resonance at 1.126 GHz, corresponds to 40% size reduction. second has an even better reduction of 60%. Measured results return loss and radiation pattern the subwavelength resonances are compared these conventional antenna.

Recently, we proposed a paradigm shift in light confinement strategy showing how relaxed total internal reflection and photonic skin-depth engineering can lead to sub-diffraction waveguides without metal [Optica1, 96 (2014)10.1364/OPTICA.1.000096OPTIC82334-2536]. Here, show that such extreme-skin-depth (e-skid) counterintuitively confine better than the best-case all-dielectric design of high index silicon surrounded by vacuum. We also establish analytically figures merit related dielectric...

Supraparticles are coordinated assemblies of discrete nanoscale building blocks into complex and hierarchical colloidal superstructures. Holistic optical responses in such not observed an individual block or their bulk counterparts. Furthermore, subwavelength dimensions the unit enable engraving metamaterials within supraparticle, which thus far has been beyond current pool engineering. This can lead to effective features a platform with ability tune electromagnetic these particles. Here, we...

Current crowding at bends of superconducting nanowire single-photon detectors is one the main factors limiting performance meander-style with large filling factors. In this paper, we propose a new concept to reduce influence current effect, so-called variable thickness SNSPD, which composed two regions different thicknesses. A larger in comparison straight sections locally reduces density and suppression critical caused by crowding. This allows SNSPD have higher current, an improved...

Despite recent progress in nonlinear optics wavelength-scale resonators, there are still open questions on the possibility of parametric oscillation such resonators. We present a general approach to predict behavior and estimate threshold multi-mode subwavelength optical oscillators (OPOs). As an example, we propose OPO based Mie-type multipolar resonances, demonstrate that due low- <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>Q</mml:mi> </mml:math>...

Optical forces acting on particles - controlled by the intensity, polarization and direction of optical beams have become an important tool in manipulation, sorting analysis nano/micro-particles. The nature these has been well understood reciprocal structures exhibiting time-reversal symmetries. Here, we investigate non-reciprocal with non-degenerate counter-propagating modes. We consider specific case non-reciprocity induced via translational motion show that two modes a moving...

Total internal reflection (TIR) is a ubiquitous phenomenon used in photonic devices ranging from waveguides and resonators to lasers optical sensors. Controlling this light confinement are keys the future integration of nanoelectronics nanophotonics on same silicon platform. We introduced concept relaxed total 2014 control evanescent waves generated during TIR. These unchecked fundamental reason inevitably diffraction-limited cannot be miniaturized. Our key design engineered anisotropy...

During tunneling in loose grounds, the ground deformation caused by drillings around tunnel, leads to land subsidence and adjacent tunnel which would affect structure surrounding structures. In such situations it is necessary improve properties of prior drilling operations. order acquire face stability during excavation operations areas with soil fault or lack adhesion, there are various methods as split cross drilling, frame holder auxiliary pre-holding umbrella arch method; must provide...

Superconducting nanowire single-photon detectors have emerged as a promising technology for quantum metrology from the mid-infrared to ultraviolet frequencies. Despite recent experimental successes, predictive model describe detection event in these is needed optimize metrics. Here, we propose probabilistic criterion based on single-vortex (flux quanta) crossing width of nanowire. Our makes connection between dark counts and photon near threshold. The finite-difference calculations...

According to technology development and relative facilitation in digging underground structures, ways, highways, all types of tunnels, train network, other settle, storage are number structure built developed advanced countries. In most situation, tunnel operations done years after its construction or not recorded new structures regulations; therefore, this research investigates soil settlement inserting force coverage by limiting studies about effects shapes on using Plaxis, Seismo Signal,...

Extreme skin depth engineering ( e-skid ) can be applied to integrated photonics manipulate the evanescent field of a waveguide. Here we demonstrate that implemented in two directions order deterministically engineer wave allowing for dense integration with enhanced functionalities. In particular, by increasing depth, enable creation two-dimensional (2D) directional couplers large gaps and operational bandwidth. experimentally validate 2D complementary metal–oxide semiconductor (CMOS)...

Optical nonlinear functions are crucial for various applications in integrated photonics, such as all-optical information processing, photonic neural networks and on-chip ultrafast light sources. Due to the weak nonlinearities most platforms, realizing optical typically requires large driving energies picojoules level or beyond, thus imposing a barrier applications. Here, we tackle this challenge demonstrate an splitter device lithium niobate nano-waveguides by simultaneous engineering of...

With the increasing population and consequent needs for transport facilities, construction of tunnels in urban environments is fast growing. Tunneling at each depth soil, causes changes earth’s surface; this more important about areas tunnels, especially when crossing residential areas, so having knowledge their performance really important. Some consequences underground tunneling are earth surface moving around tunnel, movement tunnel’s surrounding earthquake acceleration. The behavior...

An optical topological transition is defined as the change in photonic iso-frequency surface around epsilon-near-zero (ENZ) frequencies which can considerably spontaneous emission of a quantum emitter placed near metamaterial slab. Here, we show that due to strong Kerr nonlinearity at ENZ frequencies, high-power pulse induce sudden topology dispersion curve, leading significant transmission propagating well evanescent waves through This wave switch effect allows for control modulation...

We demonstrate phase-sensitive amplification and confirm aga in exceeding 100 dB/cm on a dispersion-engineered thin-film lithium niobate waveguide, using less than 20 pJ of pump energy, exhibiting gain bandwidth larger 600 nm around 2.09 μm.

We introduce a paradigm shift in light confinement strategy and show that can be confined beyond the diffraction limit using transparent artificial media (all-dielectric metamaterials). Our approach controls optical momentum of evanescent waves - an important electromagnetic property overlooked photonic devices.

We introduce a paradigm shift in light confinement strategy and show that can be confined below the diffraction limit using completely transparent artificial media (metamaterials with ϵij​>1 μij=1).