Qi Cheng

First Demonstration of Broadband Internal Gain in Bismuth-Doped GeSe 4 Waveguide

Qi Cheng, Zhe Long, Lei Qian, Yi Zou et autres

We prepared bismuth (Bi)-doped GeSe₄ chalcogenide thin films via ion beam sputtering and fabricated ridge waveguides using standard photolithography. The waveguide exhibited a propagation loss of 3.7 dB/cm at 1500 nm. Under a signal power of -43.8 dBm and a pump power …

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High Quality Factor, High Sensitivity Ta 2 O 5 Microring Resonator for Biochemical Sensing

Zheng Zhang, Peng Chen, Zhe Long, Qi Cheng et autres

We demonstrate a high-performance Ta.O. microring resonator fabricated using electron-beam lithography and inductively coupled plasma etching. The loaded Q-factor of the fundamental TE mode reaches 3.1 × 105at 1550 nm under ambient conditions, with post-annealing at 600$^{\circ }$C further elevating this value …

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Impact of different pumping and signal schemes on amplification performance of erbium-doped Ga 2 O 3 waveguides

Qi Cheng, Peng Chen, Zhe Long, Zheng Zhang et autres

Mode solutions simulations are employed to optimize the waveguide structure to enhance light interaction with rare-earth ions. Subsequently, an Er 3+ :Ga 2 O 3 waveguide with an optimized structure is fabricated. The optical gain performance is characterized under bidirectional 980 nm …

ZmPRR37-ZmYSL14 module enhances salt stress tolerance in maize

Zhixue Liu, Wanjun Zhang, Jing Zhang, Qi Cheng et autres

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Multi-Band Electromagnetically Induced Transparency-Like Metamaterials*

Ziyang Zhao, Sichen Fan, Qi Cheng, Renxia Ning et autres

In this paper, a double layer metamaterial structure in the microwave band is studied. The transmission spectrum of the structure is analyzed by the finite-integration time-domain (FITD) method. The results show that the structure can produce multi-band Electromagnetically induced transparency(EIT)-like effect. To …

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High-performance CO detection based on a PhC cavity in terahertz band

Qi Cheng, Yuanlin Guan, Guangsheng Xu, Jianlin Dong et autres

Combined with the light absorption from molecular vibration, photonic crystal (PhC) cavity structures have gradually shown great potential in gas detection, particularly for toxic gases. We proposed a PhC cavity with a high-quality factor of 1.24 × 10 6 and a small …

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Enhanced sensitivity of temperature sensor by a novel birefringent photonic crystal fiber with PDMS filling

Qi Cheng, Shuanghe Fan, Yuanlin Guan, Jianlin Dong et autres

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On-Chip Supercontinuum Generation Pumped by Short Wavelength Fiber Lasers

Peng Chen, Zhe Long, Qi Cheng, Maozhuang Song et autres

Supercontinuum (SC) generation pumped by fiber lasers with short wavelengths below 2.0 μm is important since it can provide a compact light source for various applications. We review the progress of SC generation in various materials regarding the formation of the waveguides …

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CCDC 2175062: Experimental Crystal Structure Determination

Qi Cheng

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, …

CCDC 2164585: Experimental Crystal Structure Determination

Qi Cheng

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, …

Topological photonic crystal biosensor with valley edge modes based on a silicon-on-insulator slab

Qi Cheng, Shutao Wang, Jiangtao Lv, Na Liu

In the development of integrated sensing, how to reduce losses and improve robustness has always been one of the key problems to be solved. The topological photonic crystal structure based on the quantum Hall effect has gradually attracted the attention of researchers …

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Dual-Channel Surface Plasmon Resonance–Based Photonic Crystal Fiber Sensor with Metal-Ta2O5 Coating at Near-infrared Wavelength

Shutao Wang, Wenbo Ma, Qi Cheng, Na Liu et autres

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