Silicon T centers present the promising possibility of generating optically active spin qubits in an all-silicon device. However, these color exhibit long excited state lifetimes and a low Debye–Waller factor, making them dim emitters with efficiency into zero-phonon line. Nanophotonic cavities can solve this problem by enhancing radiative emission line through Purcell effect. In work, we demonstrate cavity-enhanced from single center nanophotonic cavity. We achieve 2 order magnitude...

Electric vehicles (EVs) have the advantages of low pollution, energy consumption, and high efficiency, so they are highly valued by governments, enterprises, consumers. However, promotion use electric is restricted to a certain extent because their limited range. This paper selects vehicle intercity medium- long-distance travel as research object, takes classical flow-capturing location problem theoretical basis for expressway network or national highway network. also considers driver’s...

Fully harnessing the inherent flexible adjustment potential of steel enterprises and fostering their interaction with power grid is a crucial pathway to advancing green transformation. However, traditional research usually takes reducing energy consumption as optimization goal, which limits response capability, or ignores storage conversion constraints secondary sources such gas, steam, electricity, making it difficult fully explore reasonably utilize multi-energy coordination. This study...

Quantum memories are a key building block for optical quantum computers and networks. Rare-earth ion-doped crystals promising material to achieve memory using an atomic frequency comb protocol. However, current typically use bulk materials or waveguides with large cross sections rely on fabrication techniques not easily adaptable wafer scale processing. Here, we demonstrate compact chip-integrated in rare-earth-doped thin-film lithium niobate. Our exhibits broad storage bandwidth exceeding...

In this paper, we rationally designed a novel hybrid material consisting of Co9S8 nanotubes decorated with molybdenum sulfide lamellae (Co9S8/MoSx), which was synthesized by consecutive solvothermal treatments. The extensive characterizations the using X-ray diffraction, field emission scanning electron microscopy, transmission microscopy (TEM), and high-resolution TEM analyses certified that decoration amorphous MoSx. analysis photoelectron spectra suggested existence strong interface...

Power transformers are an important asset of power companies. To improve the economic benefits companies, it is great significance to accurately predict lifecycle cost each transformer. Based on historical operating data 83 110 kV transformers, this paper estimates costs different and then creates a dataset containing estimated multiple features namely, bid price, transformer capacity, no-load loss, load silicon steel cost, copper wire annual failure frequency (AFF) major repair, AFF minor...

The sensor is based on the peroxidase-like activity of Au@PtNPs. Thiourea can quickly be detected by color change solution. method was applied to determination thiourea in practical samples.

Abstract On-chip optical filters are fundamental components in signal processing. While rare-earth ion-doped crystals offer ultra-narrow filtering via spectral hole burning, their applications have primarily been limited to those using bulk crystals, restricting utility. In this work, we demonstrate cavity-enhanced based on ions an integrated nonlinear platform. We incorporate into high quality-factor ring resonators patterned thin-film lithium niobate. By burning at 4 K a critically coupled...

Abstract A highly sensitive and selective colorimetric analysis method based on unmodified gold nanoparticles (AuNPs) to detect iodide ions (I − ) in solution the presence of hexadecyl trimethyl ammonium bromide (CTAB) mercury (Hg 2+ has been successfully developed. Hg could form a amalgam with AuNPs protect from CTAB‐induced aggregation caused by electrostatic attraction between CTAB citrate ion‐covered AuNPs. When mixture I was added AuNPs, formation HgI 2 complex destroyed protection for...

We demonstrate compact chip-integrated atomic frequency comb storage in rare-earth doped thin-film lithium niobate. Our optical memory exhibits a broad bandwidth exceeding 100 MHz, and time of over 250 ns.

Experimental characterization of the in-plane stress tensor is a basic requirement for development GaN strain engineering. In this work, theoretical model using polarized micro-Raman spectroscopy was developed based on elasticity theory and lattice dynamics. Compared with other works, presented can give quantitative relationship between all components measured Raman shift. The verified by calibration experiment under step-by-step uniaxial compression. By combining expanding cavity model,...

The heterogeneous integration of silicon with III-V materials provides a way to overcome silicon’s limited optical properties toward broad range photonic applications. Hybrid modes are promising integrate such Si/III-V devices, but it remains unclear how utilize these achieve crystal cavities. Herein, using 3D finite-difference time-domain simulations, we propose hybrid Si-GaAs cavity design that operates at telecom wavelengths and can be fabricated without requiring careful alignment....

Based on the anti-aggregation mechanism of citrate stabilized gold nanoparticle (AuNPs), a new specific and sensitive colorimetric sensor for thiocyanate (SCN-) was developed. In this scheme, AuNPs were aggregated in presence aggregating agent 2-aminopyridine (2-AP) due to electrostatic attraction. The solution color changed from red blue. When SCN- present, formed sulfur-gold bond with protect aggregation. Thiocyanate can be detected by change blue red. results showed that absorbance ratio...

Ultrathin optical limiters are needed to protect light sensitive components in miniaturized systems. However, it has proven challenging achieve a sufficiently low limiting threshold. In this work, we theoretically show that an ultrathin limiter with threshold intensity can be realized using nonlinear zone plate. The plate is embedded saturable absorbing materials allow the device focus light, while high transmitted as plane wave without focal spot. Based on proposed mechanism, use...

A Kentucky coal sample treated by microwave irradiation (MI) combined with sodium hydroxide solution was performed using a thermo-gravimetric analyzer (TGA) coupled to Fourier transform infrared spectrometer (FTIR). The combustion properties and structural changes of under different conditions were investigated compared. results show that the desulfurization efficiency samples increases increase concentration. Microwave can significantly improve efficiency. whole process becomes longer;...

On-chip optical filters are fundamental components in signal processing. While rare-earth ion-doped crystals offer ultra-narrow filtering via spectral hole burning, their applications have primarily been limited to those using bulk crystals, restricting utility. In this work, we demonstrate cavity-enhanced based on ions an integrated nonlinear platform. We incorporate into high quality-factor ring resonators patterned thin-film lithium niobate. By burning a critically-coupled resonance mode,...

We demonstrate cavity-enhanced narrow bandpass filtering based on rare-earth-ion-doped thin-film lithium niobate by spectral hole burning in a critically-coupled resonance mode. Furthermore, we show that bandstop can also be realized utilizing an under-couped cavity.