Xiang’ai Cheng

GLSaT: a spectral-aware transformer-based network enabling highly efficient and precise inverse design in metasurface optical filters

Jiahui Liao, Xiang’ai Cheng, Q.Y. Li, Yuting Jiang et autres

The traditional forward design process of metasurface optical filters is computationally costly and time-consuming; therefore, inverse design based on deep learning (DL) can help accelerate the process. We propose the global- and local-spectrum-aware transformer (GLSaT), a DL model that concerns the intrinsic …

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The Design of Highly Reflective All-Dielectric Metasurfaces Based on Diamond Resonators

Zhongyang Xing, Jiahui Liao, Zhongjie Xu, Xiang’ai Cheng et autres

All-dielectric metasurfaces offer a low-loss alternative to plasmonic metasurfaces. We proposed the configuration for high-reflectivity all-dielectric metasurfaces based on single-crystal diamond (SCD) resonators on fused silica substrate and conducted simulations to optimize and analyse such configuration via FDTD solver. We utilized GMR …

Fresnel Diffraction Model for Laser Dazzling Spots of Complementary Metal Oxide Semiconductor Cameras

Zhongjie Xu, Hairong Zhong, Xiang’ai Cheng, Zhongyang Xing et autres

Laser dazzling on complementary metal oxide semiconductor (CMOS) image sensors is an effective method in optoelectronic countermeasures. However, previous research mainly focused on the laser dazzling under far fields, with limited studies on situations that the far-field conditions were not satisfied. In …

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Computing dimension for a reconfigurable photonic tensor processing core based on silicon photonics

Hao Ouyang, Zilong Tao, Jie You, Hao Hao et autres

In the rapidly evolving field of artificial intelligence, integrated photonic computing has emerged as a promising solution to address the growing demand for high-performance computing with ultrafast speed and reduced power consumption. This study presents what we believe is a novel photonic …

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Color coded metadevices toward programmed terahertz switching

Weibao He, Xiang’ai Cheng, Siyang Hu, Ziheng Ren et autres

Terahertz modulators play a critical role in high-speed wireless communication, non-destructive imaging, and so on, which have attracted a large amount of research interest. Nevertheless, all-optical terahertz modulation, an ultrafast dynamical control approach, remains to be limited in terms of encoding and …

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On-chip silicon photonic micro-ring processor lights up optical image encryption

Zeyu Zhao, Hao Ouyang, Jie You, Zilong Tao et autres

Optical image encryption has long been an important concept in the fields of photonic network processing and communication. Here, we propose a convolution-like operation-based optical image encryption algorithm exploiting a silicon photonic multiplexing architecture to achieve content security. Particularly, the encryption process …

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Creating Anti‐Chiral Exceptional Points in Non‐Hermitian Metasurfaces for Efficient Terahertz Switching

Zhongyi Yu, Weibao He, Siyang Hu, Ziheng Ren et autres

Non-Hermitian degeneracies, also known as exceptional points (EPs), have presented remarkable singular characteristics such as the degeneracy of eigenvalues and eigenstates and enable limitless opportunities for achieving fascinating phenomena in EP photonic systems. Here, the general theoretical framework and experimental verification of …

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Parallel edge extraction operators on chip speed up photonic convolutional neural networks

Hao Ouyang, Zeyu Zhao, Zilong Tao, Jie You et autres

We experimentally establish a 3 × 3 cross-shaped micro-ring resonator (MRR) array-based photonic multiplexing architecture relying on silicon photonics to achieve parallel edge extraction operations in images for photonic convolution neural networks. The main mathematical operations involved are convolution. Precisely, a faster …

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High-order exciton complexes induced by an interlayer carrier transfer in 2D van der Waals heterostructures

Yizhen Sui, Xiang’ai Cheng, Qirui Liu, Yuxiang Tang et autres

High-order correlated excitonic states, such as biexciton, charged biexciton, and polaron, hold a promising platform in contemporary quantum and nonlinear optics due to their large Bohr radii and thus strong nonlinear interactions. The recently found 2D TMDs further give such excitonic states …

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Transient Loss‐Induced Non‐Hermitian Degeneracies for Ultrafast Terahertz Metadevices

Weibao He, Yuze Hu, Ziheng Ren, Siyang Hu et autres

Non-Hermitian degeneracies, also known as exceptional points (EPs), have attracted considerable attention due to their unique physical properties. In particular, metasurfaces related to EPs can open the way to unprecedented devices with functionalities such as unidirectional transmission and ultra-sensitive sensing. Herein, an …

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Intelligent cloud teaching of photoelectric courses

Hairong Zhong, Xiang’ai Cheng, Jianhua Shi, Bing Lei et autres

With the widespread use of mobile internet, cloud computing, big data, and artificial intelligence in the field of education, a new teaching model based on cloud technology has been rapidly developed. This new model follows the curriculum's "construction-implementation-evaluation" process and includes a …

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Using Cloud Class + for online and offline hybrid teaching interaction mode: the case of the applied optics course

Xiang’ai Cheng, Zhongyang Xing, Ning Yu, Zhongjie Xu et autres

Cloud Technology is changing the teaching mode of traditional higher education. The use of mobile teaching assistants such as “Cloud Class” and “Cloud Textbook” can effectively improve teaching efficiency and quality. On this basis, the online and offline hybrid teaching interaction mode …

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