Abstract Driven by the increasing demand on handing microwave signals with compact device, low power consumption, high efficiency and reliability, it is highly desired to generate, distribute, process using photonic integrated circuits. Silicon photonics offers a promising platform facilitating ultracompact signal processing assisted silicon nanophotonic devices. In this paper, we propose, theoretically analyze experimentally demonstrate simple scheme realize rejection ratio tunable notch...

Lithium niobate (LN) devices have been widely used in optical communication and nonlinear optics due to its attractive properties. The emergence of the thin-film lithium on insulator (LNOI) improves performances LN-based greatly. However, a high-efficient fiber-chip coupler is still necessary for LNOI-based practical applications. In this paper, we demonstrate highly efficient polarization-independent edge based LNOI. coupler, fabricated by standard semiconductor process, shows low coupling...

Multispectral and polarized focusing imaging are key functions that vitally important for a broad range of optical applications. Conventional techniques generally require multiple shots to unveil desired information implemented via bulky multi-pass systems or mechanically moving parts difficult integrate into compact integrated systems. Here, design ultra-compact transversely dispersive metalens capable both spectrum polarization ellipticity recognition reconstruction in just single shot is...

All-dielectric metamaterials offer great flexibility for controlling light-matter interaction, owing to their strong electric and magnetic resonances with negligible loss at wavelengths above the material bandgap. Here, we propose an all-dielectric asymmetric metasurface structure exhibiting high quality factor prominent Fano line shape. Over three-orders photoluminescence enhancement is demonstrated in fabricated record-high of 1011. We find this emission attributed coherent resonances,...

We demonstrate four-wave mixing (FWM) in a 10-μm-radius silicon microring resonator with the assistance of giant nonlinearity monolayer graphene. A maximum enhancement 6.8 dB conversion efficiency silicon-graphene (SGM) is observed. nonlinear propagation model established and optical Kerr coefficient hybrid waveguide three times larger than that waveguide.

A space channel design approach achieves dynamic meta-holography with high frame rate and large number.

A resonant metasurface with high quality factor can not only localize light at the nanoscale but also manipulate far-field radiation. In this work, we experimentally demonstrate an active Fano-resonant that combines asymmetric silicon nanorod array embedded germanium quantum dots. The collective resonance of nanorods results in strong near-field confinement, and lead to directional emission. This gives rise 3 orders magnitude enhancement photoluminescence intensity respect unpatterned area....

Inverse-designed free-form nanophotonic structures have shown great potential in designing ultra-compact integrated photonic devices, but strict fabrication requirements may hinder further applications. We propose here a photonic-crystal-like (PhC-like) subwavelength structure, which is insensitive to the lag effect that most common error. A colorless 3 dB coupler employing such structure designed, fabricated, and characterized. With only one-step etching, coupling region of our final device...

The high performance of thin film lithium niobate on insulator (LNOI) platform shows potential for electro-optical signal processing and nonlinear optics systems. To realize precise polarization management sub-wavelength devices, we theoretically experimentally investigate fundamental transverse electric (TE) magnetic (TM) mode hybridization in an x-cut LNOI ridge waveguide. Sudden jumps the free-spectrum-range (FSR) these modes a fabricated microring resonator demonstrate hybridization....

Boosting second-order optical nonlinear frequency conversion over subwavelength thickness has long been pursued through resonance in micro- and nanophotonics. However, the availability of thin film materials with high nonlinearity is limited to III-V semiconductors, which have low transparency visible. Here, we experimentally demonstrated strongly enhanced second harmonic generation one-dimensional heterostructure cavities on lithium niobate. A guided-mode resonator distributed Bragg...

Abstract The surging global demand for renewable energy has fueled the expansion of offshore wind energy, leveraging superior profiles and technological advancements in turbine technology. Despite this growth, operational experience floating turbines still needs to be improved as an emerging Addressing knowledge gap, our study compiles a comprehensive database failure events associated with these turbines. Employing rigorous analytical approach through Fuzzy Failure Mode Effect Analysis...

We experimentally demonstrate enhanced third harmonic generation (THG) using a silicon metasurface, which is consist of symmetric spindle-shape nanoparticle array. Relying on the trapped mode supported by high quality factor all-dielectric conversion efficiency THG about 300 times larger than that bulk slab. The maximum extinction ratio intensity reaches 25 dB tuning polarization incident light. simulation results agree with experimental performances.

Abstract To define and characterize optical systems, obtaining the amplitude, phase, polarization profile of beams is utmost importance. Traditional polarimetry well established to state. Recently, metasurfaces have successfully been introduced as compact components. Here, we take metasurface concept system level by realizing arrays metalenses, allowing determination an beam. We use silicon-based metalenses with a numerical aperture 0.32 mean measured focusing efficiency in transmission mode...

Abstract Metasurface‐based lenses (metalenses) offer specific conceptual advantages compared to ordinary refractive lenses. For example, it is possible tune the focal length of a metalens doublet by varying relative angle between two metalenses while fixing their distance, leading an extremely compact zoom lens. An improved polarization‐insensitive design based on silicon nanocylinders silica substrates presented. This realized and characterized experimentally at 1550 nm wavelength. By in...

Recently, thin-film lithium niobate coherent modulators have emerged as a promising candidate for the next generation communication system. High performance polarization splitter-rotators (PSRs) are essential to further achieve dual modulators. Here we present PSR on insulator (LNOI) platform with measured insertion loss less than 1 dB, extinction ratio exceeding 26.6 dB and 19.6 TE0 TM0 modes, working bandwidth of 1520-1580 nm total length 440 µm. In addition, relatively large fabrication...

An all-silicon passive optical diode based on nonlinearity in cascaded photonic crystal (PhC) L3 cavities is proposed and demonstrated. A nonreciprocal transmission ratio (NTR) of 30.8 dB insertion loss 8.3 are realized the device. The device has a relatively broad 17 operation bandwidth 0.08 nm, at least 16 NTR achieved when input power varies between −6.25 −2.95 dBm. nonlinear couple mode model for PhC established to analyze behavior device, numerical simulation results good agreement with...

A design for enhancing the quality (Q) factor of a photonic crystal ring resonator (PCRR) is introduced. The highest Q based on simulations 121,000. analysis momentum space distributions electric field profile PCRR resonance shows that high attributed to reduction tangential k-vector component inside leaky region. 75,200 experimentally demonstrated modified silicon-on-insulator wafer. high-Q-factor here will be beneficial channel drop filters, lasers, sensors, and other applications.

Dielectric nanoparticles supporting pronounced toroidal and anapole resonances have enabled a new class of optical antennas with unprecedented functionalities. In this work, we propose light-emitting silicon metasurface which simultaneously supports both magnetic dipole electric in the near-infrared region. The consists square array split nanodisks embedded germanium quantum dots. By varying width air-gap, spectral positions quality factors two dipoles are flexibly tuned. Large...

We successfully demonstrate a monolithic integrated dual-polarization in-phase/quadrature (IQ) modulator based on thin-film lithium niobate platform with silicon substrate, which consists of IQ modulators, spot-size converters, and polarization rotator combiner. When coupled maintaining fibers, the measured insertion loss is 12 dB. In addition, we experimentally achieve single-carrier 1.6 Tb/s net bitrate transmission.

Rejection-wavelength tuning is achieved by combining the mechanochromic response of photonic bandgap composites with intrinsic electroactive properties dielectric thin films. By straining composite electrode, crystal interparticle lattice constant varied in situ (see Figure). These simple-to-make films may find use devices that require a compact light-propagation controlling component.

We observe theoretically and experimentally electromagnetically induced transparency (EIT)-like effect in a single microdisk resonator (MDR) evanescently coupled with two bus waveguides. This structure is modeled using transfer matrix method, it revealed that the EIT-like spectrum originates from coherent interference between nearby low-order whispering-gallery modes (WGMs) comparable quality factors. The properties have been investigated analytically respect to coupling efficiency,...

In this paper, four-channel cascaded Mach-Zehnder interferometer-based wavelength (de)multiplexers in the O-band are demonstrated experimentally by utilizing silicon nitride (SiN) optical waveguides. By reference to commonly used 100 Gigabit Ethernet standards, two types of (de)multiplexer devices with different channel spacings designed and fabricated. Both exhibit low insertion loss flat passbands. The lower thermo-optical coefficient provided SiN brings benefits reduction thermal...

Fano resonance (FR) holds promising applications for high performance optoelectronic devices due to its strong enhancement of light-matter interactions. In this work, we experimentally demonstrate a tunable FR in photonic crystal nanoresonator (PCR), including the effects structural parameters and graphene nanosheets with different layer numbers. The results show that intensity position peaks can be tuned via altering lattice constant hole radius PCR variation effective refractive index....

We demonstrate that linear absorption coefficient (LAC) of a graphene-silicon hybrid waveguide (GSHW) is determined by the optical transmission spectra graphene coated symmetrically coupled add-drop silicon microring resonator (SC-ADSMR), which value around 0.23 dB/um. In contrast to traditional cut-back method, measured results are not dependent on coupling efficiency fiber tip and waveguide. Moreover, precision evaluation (SMR) crucial for optoelectronic devices targeting compact footprint...