The development of detection technologies has driven an urgent need for multispectral camouflage capabilities. However, the requirement for multispectral camouflage, including colored visible (VIS) camouflage, adaptive infrared (IR) camouflage, and multi-band laser camouflage, challenges conventional single-design approaches from design to fabrication. Here, we propose a simplified design strategy that enables decoupling between material and structural regulation, thereby enhancing multiband modulation performance. From visible to near-infrared (NIR) bands, thin-film Fabry–Pérot cavities facilitate simultaneous visible structural color and NIR laser band absorption. The calculated VIS results are in excellent concordance with experimental ones (ΔĒ < 6). Experimental measurements further demonstrate broadband (900 nm-1550 nm) ultra-high absorption in the NIR band. The orders-of-magnitude difference in wavelengths enables structural dimensions decoupling, effectively separating the influence of the architecture on visible and mid-infrared (MIR) performance. In the MIR region, the metadevice realizes adaptive infrared thermal camouflage with laser camouflage based on phase-change material.

Analog optical computing (AOC) has attracted great attention over the past few years, because of its ultra-high speed (potential for real-time processing), ultra-low power consumption, and parallel processing capabilities. In this article, we design an adder and an ordinary differential equation solver (ODE) on chip by Fourier optics and metasurface techniques. The device uses the 4f system consisting of two metalenses on both sides and one middle metasurface (MMS) as the basic structure. The MMS that performs the computing is the core of the device and can be designed for different applications, i.e., the adder and ODE solver in this article. For the adder, through the comparison of the two input and output signals, the effect of the addition can be clearly displayed. For the ODE solver, as a proof-of-concept demonstration, a representative optical signal is well integrated into the desired output distribution. The simulation result fits well with the theoretical expectation, and the similarity coefficient is 98.28%. This solution has the potential to realize more complex and high-speed artificial intelligence computing. Meanwhile, based on the direct-binary-search (DBS) algorithm, we design a signal generator that can achieve power splitting with the phase difference of $\pi$ between the two output waveguides. The signal generator with the insertion loss of −1.43 dB has an ultra-compact footprint of 3.6 $\mathsf{\mu }\mathrm{m}$× 3.6 $\mathsf{\mu }\mathrm{m}$. It can generate a kind of input signal for experimental verification to replace the hundreds of micrometers of signal generator composed of a multi-mode interference (MMI) combination used in the verification of this type of device in the past.

The modulation of thermal radiation is essential for advanced photonic applications, offering a novel perspective for information carriers. However, current carriers are limited to a few discrete radiation states at isolated time points and cannot capture the entire dynamic process along the full temporal axis, resulting in substantial information loss. Here, we propose and experimentally validate a novel spatiotemporal modulation strategy that dynamically tailors emissivity across the entire temporal domain, where gentle and uniform modulation of atomic configurations enables the creation of entirely novel permittivity libraries. To realize flexible thermal radiation tailoring, we utilize an Ag–In ₃ SbTe ₂ (IST) interface atomic rearrangement metamaterial (ARM). As a dynamic optical control platform, ARM exhibits continuous spectral modulation with remarkably high amplitudes (64.74% in the 3- to 5-μm band and 73.94% in the 8- to 14-μm band), together with rich variations across the temporal domain to realize tailored infrared emissivity and infrared information encryption. This work establishes a unified framework for continuous, atomic-scale spatiotemporal control of thermal radiation, opening new pathways for spectral modulation and photonic information regulation in the time domain.

Moiré metalens is attractive for imaging applications due to their compact form factor and high zoom ratio. Here, we propose a novel Moiré zoom metalens system that achieves a continuous 10× zoom over a focal length range of 2.2–22 mm at 1,064 nm, while extending the full field of view up to 93°. A variable aperture, capable of axial translation, is introduced to jointly suppress aberrations and maintain a large aperture size with f‐numbers ranging from 2.5 to 7.5. The system delivers near‐diffraction–limited imaging resolution across the entire zoom and field‐of‐view range, with Strehl ratios exceeding 0.9. This level of performance is comparable to commercial optics and is rarely reported in metalens‐based zoom systems. Remarkably, the total optical volume is only ∼4.2 × 32 mm, underscoring its potential for miniaturized imaging. Furthermore, we establish an integrated design and validation pipeline that strategically combines geometric optics, scalar diffraction, and vectorial electromagnetic theory. This multi‐theory approach provides an efficient and generalizable pathway for the development of high‐performance metalens systems.

The available high speed InGaAs/InP-based single-photon avalanche detectors (SPAD) are normally worked at fixed gate or narrow tunable gate frequency. However, a wide tunable gate frequency or even free running single photon detectors at high speed would be very useful in quantum key distribution, quantum entanglement distribution and so on. Here, we present a high speed InGaAs/InP-based single photon avalanche detector (SPAD) with tunable gate frequency from 900MHz to 1000MHz which also can work under the room temperature without any cooling setups. Instead of restricting the spike noise by self-differencing or filtering method, we use an Analog to Digital Converter(ADC) to sample the output voltage of the APD. Through the sampled voltage we can discriminate an avalanche signal from the noise. Based on the sampling method, a room temperature SPAD is implemented with a dark count rate of 2.5 × 10⁻⁵ per gate and afterpulse probability of 1.3%, given the condition that detection efficiency of 10.6%, dead time of 1ns, and clock frequency of 1GHz. The wide tunable gate frequency makes the SPAD very suitable for practical use and commercial producing.

Quantum clock synchronization (QCS) can measure out the high-precision clock difference among distant users, which breaks through the standard quantum limit by employing the properties of quantum entanglement. Currently, the wavelength division multiplexed QCS network has been demonstrated with a spontaneous parametric down-conversion entangled photon source. In this paper, we propose a more efficient QCS network scheme with the wavelength multicasting entangled photon source, which can decrease at least 25% of wavelength channel consumption under the identical network scale. Afterwards, a four node QCS network is demonstrated, where the wavelength multicasting entangled photon source is utilized with dual-pumped four-wave mixing silicon chip. The experimental results show that the measured time deviation is 3.4 ps with an average time of 640 s via the multiple fiber links of more than 10 km.