Abstract Integrated electro-optic (EO) frequency combs are essential components for future applications in optical communications, light detection and ranging, computation, sensing spectroscopy. To date, broadband on-chip EO typically generated high-quality-factor micro-resonators, while the more straightforward flexible non-resonant method, usually using single or cascaded phase modulators, often requires high driving power to realize a reasonably strong modulation index. Here, we show that...

Highly reproducible organometallic-halide-perovskite-based devices are fabricated by a manufacturing process, which is demonstrated. Various shapes that hard to synthesize directly fabricated, and many unique properties achieved.The fabrication procedure utilized create photodetector the detection sensitivity significantly improved. The results will bring revolutionary advancement future of lead-halide-perovskite-based optoelectronic devices.

Integrated optical power splitter is one of the fundamental building blocks in photonic integrated circuits (PIC). Conventional multimode interferometer based widely used as it has reasonable footprint and easy to fabricate. However, challenging realize arbitrary split ratio especially for multi-outputs. In this work, an ultra-compact with a QR code-like nanostructure designed by nonlinear fast search method (FSM). The highly functional structure composed number freely square pixels size...

Solution‐processed lead halide perovskites have shown good applicability in both solar cells and microlasers. Very recently, the nonlinear properties of attracted considerable research attention. Second harmonic generation two‐photon absorption been successfully demonstrated. However, perovskite devices based on these properties, such as micro‐ nanolasers thus far not fabricated. Here we demonstrate pumped microlasers from CH 3 NH PbBr microwires. These microwires are synthesized through a...

The topological edge state (TES) in a one-dimensional optical lattice has exhibited robust field localization or waveguiding against the structural perturbations that would give rise to fault-tolerant photonic integrations. However, zero mode as kind of TES usually deviates from exact zero-energy finite Hermitian due coupling between these states, which inevitably weaken protection. Here, we first show such breakup modes Su-Schriffer-Heeger lattices and then reveal their recovery by...

Very recently, perovskite based microdisk lasers have attracted considerable research attention. However, most of the researches are focused on lasing spectra in bottom-up synthesized microdisks with regular shapes. The directionality, which is also essential for practical applications, has not been explored. Here we demonstrate unidirectional emissions from first time. We rectangle-shaped connected straight waveguides and studied characteristics, where along observed. Numerical calculations...

Abstract Lead halide perovskites have emerged as promising materials for photovoltaic and optoelectronic devices. However, their exceptional nonlinear properties not been fully exploited in nanophotonics yet. Herein we fabricate methyl ammonium lead tri-bromide perovskite metasurfaces explore internal processes. While both of third-order harmonic generation three-photon luminescence are generated, the latter one is less affected by material loss has significantly enhanced a factor 60. The...

Abstract Lead halide perovskite microlasers have been very promising for versatile optoelectronic applications. However, most are linearly polarized with uniform wavefront. The structured laser beams carrying orbital angular momentum rarely studied and the applications of perovskites in next-generation optical communications thus hindered. Herein, we experimentally demonstrate vortex highly directional outputs well−controlled topological charges. High quality gratings fabricated film...

Hybrid plasmonic nanolasers are intensively studied due to their nanoscale mode confinement and potentials in highly integrated photonic quantum devices. Until now, the characteristics of mostly determined by crystal facets top semiconductors, such as ZnO nanowires or nanoplates. As a result, spasers isolated, lasing wavelengths random difficult tune. Herein, we experimentally demonstrate formation lead halide perovskite (MAPbX3) based hybrid nanolaser arrays with arbitrary cavity shapes...

Integrated lithium niobate (LN) photonics is a promising platform for future chip-scale microwave systems owing to its unique electro-optic properties, low optical loss and excellent scalability. A key enabler such highly linear modulator that could faithfully covert analog electrical signals into signals. In this work, we demonstrate monolithic integrated LN with an ultrahigh spurious-free dynamic range (SFDR) of 120.04 dB Hz4/5 at 1 GHz, using ring-assisted Mach-Zehnder interferometer...

On-chip optical microresonators are essential building blocks in integrated optics. The ability to arbitrarily engineer their resonant frequencies is crucial for exploring novel physics synthetic frequency dimensions and practical applications like nonlinear parametric processes dispersion-engineered comb generation. Photonic crystal ring (PhCR) resonators a versatile tool such arbitrary engineering, by controllably creating mode splitting at selected resonances. To date, these PhCRs have...

Very sharp 90°micro-bends for adiabatic optical wave propagation in multimode waveguides are demonstrated by an inverse design method, and the devices fabricated on a silicon-on-insulator platform. The compact bending structures based digital waveguide metastructures with footprints as small 2.6 μm×2.6 μm. For widths of 2 μm radii only 1 μm, TE00 mode is able to turn around corner dB loss >20 suppression ratio higher-order modes. transmission spectra measured ∼1 over 40 nm bandwidth which...

Abstract Photonic topological states have been exploited to give rise robust optical behaviors that are quite insensitive local defects or perturbations, which provide a promising solution for photonic integrations. Specifically, example, coupling between waveguides is universal function in integrated photonics. However, the performance usually suffers from high structure‐sensitivity and challenges current manufacturing massive production. Here, edge state finite Su–Schriffer–Heeger modeled...

Whispering gallery mode based optical microcavities are important for highly sensitive sensing. However, the current experimental realizations strongly dependent on high-resolution tunable lasers and evanescent coupling, which too cumbersome expensive portable devices. Herein we experimentally demonstrate a cost-effective robust approach to detect size single nanoparticle with far-field laser emissions. By placing limacon microdisk close spiral microdisk, chiral resonances have been...

The realization of high density and highly uniform nanolaser arrays in lead halide perovskite is quite challenging, especially on silicon. Herein, we demonstrate a simple way to form array silicon chip with lasing wavelengths. By positioning microwire onto grating, only the suspended parts can hold quality (Q) resonances generate laser emissions. As periodically segmented by transverse lasers are divided into periodic wavelengths from different subunits almost same. has been observed an air...

High-quality (Q)-factor silicon microdisks are promising platforms for revolutionizing bio-sensing, medical diagnoses, and frequency combs. Nevertheless, their practical applications hindered by the regular waveguide–resonator coupling configuration, which relies on sophisticated high-cost nanofabrication. Here, we demonstrate a simple, cost-effective, counterintuitive mechanism to couple light into high-Q microdisk. In contrast evanescent coupling, incident is injected through waveguides...

The detection of nanoscale objects is essential for homeland security, environmental monitoring, and early-stage diagnostics. In the past few years, optical sensors have mostly been developed with passive devices such as microcavity plasmonic nanostructures, which require external laser sources to operate significantly increase costs bulks sensing systems. To date, potential their active counterparts in has not well explored. Herein, a novel robust mechanism detect lead halide perovskite...

The control of photoluminescence and absorption lead halide perovskites plays a key role in their applications micro- nano-sized light emission devices photodetectors. To date, the wavelength controls perovskite microlasers are mostly realized by changing mixture solution. Herein, we report postsynthetic selective optical properties with conventional semiconductor technology. By selectively exposing CH3NH3PbBr3 microstructure chlorine inductively coupled plasma, find that wavelengths...

We report on the fabrication of domain-reversed structures in LiNbO3 by means direct electron beam lithography at room temperature without any static bias. The crystals were chemically etched after exposure and then, patterns domain inversion characterized atomic force microscopy (AFM). In our experiment, an interesting phenomenon occurred when wrote a one-dimensional (1-D) grating negative c-face: two-dimensional (2-D) dotted array was observed positive c- face, which is significant for its...

Perovskite microdisk lasers have been intensively studied recently. But their lasing properties are usually fixed once the devices synthesized. Here, for first time, we demonstrated switchable and tunable perovskite by surrounding them with 5CB liquid crystals. With increase of environmental temperature from 24 °C to 34 °C, wavelength slightly changed 552.91 nm 552.11 at beginning suddenly shifted around 552.54 T = 32 where phase transition crystals occurs. Our numerical calculation shows...

We demonstrate integrated 1 × 4 power splitters at 2-μm spectral range with arbitrary power-splitting ratios. The devices are based on digital meta-structures that designed by algorithm. Four split ratios of 1:1:1:1, 2:2:1:1, 2:2:2:1, and 4:3:2:1 inversely to conceptually prove the capability Up four design objectives including both efficiency between outputs each device have been jointly optimized. total transmission efficiencies all algorithm-optimized above 80%, which is predicted...

Lead halide perovskite based micro- and nano- lasers have been widely studied in past two years. Due to their long carrier diffusion length high external quantum efficiency, lead perovskites considered bright future optoelectronic devices, especially the "green gap" wavelength region. However, quality (Q) factors of are unspectacular compared conventional microdisk lasers. The record value full width at half maximum (FWHM) threshold is still around 0.22 nm. Herein we synthesized...

Abstract In mixed phase space structures, the stable islands and chaotic sea are separated by dynamical barriers. Considering small tunneling rate, intuitively, properties of long‐lived resonances within supposed to be less affected perturbations in sea. Here, modifications on which can transported through barriers strongly affect experimentally demonstrated. waveguide‐connected quadruple microdisks (WCQMs), finite orbital angular momentum propagation directions could changed controlled...