Explanipedia

Continuously tunable broadband adiabatic coupler for programmable photonic processors Open

Xiang Liu, Peipeng Xu, Yingxuan Zhao, Zhen Sheng, Fuwan Gan · 2025

Programmable integrated photonic circuits are poised to drive a new revolution in information systems by synergizing with high-speed digital signals. Central to this vision is the ability to reconfigure optical signal processing for multi-…

Design of a low-loss non-volatile optical phase shifter based on the lossy phase change material Ge2Sb2Te5 Open

Lei Niu, J.X. Zhang, Run Yu, Lili Yang, Yegang Lu , et al. · 2024

We present a low-loss, non-volatile optical phase shifter leveraging the phase change material (PCM) Ge 2 Sb 2 Te 5 (GST) operating at a 1550 nm wavelength. The design is based on the coupling mechanism between a primary silicon strip wave…

Compact multichannel reconfigurable mode demultiplexer enabled by phase change material Open

Yongxian An, Jiakai Ruan, Yixiao Gao, Teng Wang, Bowen Liu , et al. · 2024

The reconfigurable mode demultiplexer is a crucial component for flexibly routing modes into different channels in on-chip multimode photonic systems with enhanced information processing capabilities. In this paper, we present a multichann…

On-Chip Supercontinuum Generation Pumped by Short Wavelength Fiber Lasers Open

Peng Chen, Zhe Long, Qi Cheng, Maozhuang Song, Wei Wang , et al. · 2024

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 regar…

Octave-Spanning Supercontinuum Generation in as 2 S 3 Waveguides Pumped by a Mid-Infrared Femtosecond- Raman Soliton Fiber Laser Open

Zibo Wei, Kai Xia, Lei Yang, Meng Lv, Chunyu Zhang , et al. · 2024

Exceeding Two Octave-Spanning Supercontinuum Generation in Integrated as 2 S 3 Waveguides Pumped by a 2 Μm Fiber Laser Open

Peipeng Xu, Peipei Zhao, Lei Yang, Kai Xia, Peilong Yang , et al. · 2024

Compact reconfigurable on-chip polarization beam splitters enabled by phase change material Open

Jiakai Ruan, Yixiao Gao, Chunmeng Song, Peipeng Xu, Wei Zhang , et al. · 2023

In this paper, we present the design of a compact reconfigurable polarization beam splitter (PBS) enabled by ultralow-loss phase-changing Sb 2 Se 3 . By harnessing the phase-change-mediated mode coupling in a directional coupler (DC), guid…

Embedded racetrack microring resonator sensor based on GeSbSe glasses: erratum Open

Zhiyong Li, Cheng Hou, Ye Luo, Wei Zhang, Lan Li , et al. · 2023

We correct the error in [ Opt. Express 31 , 1103 ( 2023 ) 10.1364/OE.478613 ] Fig. 5(c). The unit of the vertical axis in the figure should be arbitrary units, not dB. All the conclusions are not changed after the correction.

High Q-factor, ultrasensitivity slot microring resonator sensor based on chalcogenide glasses: erratum Open

Xuelei Zhang, Chenfeng Zhou, Ye Luo, Zhen Yang, Wei Zhang , et al. · 2023

We correct the error in [ Opt. Express 30 , 3866 ( 2022 ) 10.1364/OE.450092 ], Fig. 6(c). The unit of the vertical axis in the figure should be arbitrary units, not dB. All the conclusions are unchanged after the correction.

Supercontinuum generation in As2S3 chalcogenide waveguide pumped by all-fiber structured dual-femtosecond solitons Open

Kai Xia, Zhen Yang, Peipei Zhao, Peilong Yang, Peipeng Xu , et al. · 2023

Supercontinuum sources with high compactness are essential for applications such as optical sensing, airborne detection and communication systems. In the past decades, the adoption of bulky optical parametric amplifier to pump various chal…

The Stationary Soliton Molecules Generation and Management in Tm-Doped Mode-Locked Fiber Oscillator Open

Shaohui Mo, Peilong Yang, Kai Xia, Meng Lv, Shengchuang Bai , et al. · 2023

We present an investigation on the high-SNR stationary soliton molecules generation and its characteristics analysis in a Tm-doped nonlinear polarization rotation (NPR) mode-locked laser oscillator. By inserting a narrow band filter, we su…

Compact nonvolatile polarization switch using an asymmetric Sb2Se3-loaded silicon waveguide Open

Huimin Jin, Lei Niu, Jiajiu Zheng, Peipeng Xu, Arka Majumdar · 2023

We propose and simulate a compact (∼29.5 µm-long) nonvolatile polarization switch based on an asymmetric Sb 2 Se 3 -clad silicon photonic waveguide. The polarization state is switched between TM 0 and TE 0 mode by modifying the phase of no…

Embedded racetrack microring resonator sensor based on GeSbSe glasses Open

Zhiyong Li, Cheng Hou, Ye Luo, Wei Zhang, Lan Li , et al. · 2022

In this article, a compact racetrack double microring resonator (MRR) sensor based on Ge 28 Sb 12 Se 60 (GeSbSe) is investigated. The sensor device consists of a racetrack microring, an embedded small microring, and a strip waveguide. Elec…

Broadband Polarization Rotator and Splitter Based on 70 nm-Etched Waveguides on SOI Platform Open

Ye Tian, Zhe Kang, Tingge Dai, Peipeng Xu, Yan Li , et al. · 2022

The standard silicon photonic platforms provide three-step silicon etching, i.e., 220 nm for full etching, 70 nm for shallow etching, and 130 nm (or 150 nm) for slab etching. Previously reported mode-evolution-based polarization rotators a…

Athermal Chalcogenide Microresonator Cladded With Polymer Open

Zhen Yang, Zhiyuan Wang, Rizhen Zhang, Peipeng Xu, Wei Zhang , et al. · 2022

We proposed and demonstrated an athermal microring resonator in high index-contrast chalcogenide glass film GeSbSe with SU-8 cladding. Due to the negative thermo-optic coefficient of SU-8, we experimentally achieved near athermal behavior …

Compact nonvolatile 2×2 photonic switch based on two-mode interference Open

Chunmeng Song, Yixiao Gao, Guoxiang Wang, Yimin Chen, Peipeng Xu , et al. · 2022

On-chip nonvolatile photonic switches enabled by phase change materials (PCMs) are promising building blocks for power-efficient programmable photonic integrated circuits. However, large absorption loss in conventional PCMs (such as Ge 2 S…

Narrow-bandwidth Bragg grating filter based on Ge-Sb-Se chalcogenide glasses Open

Chenfeng Zhou, Xuelei Zhang, Ye Luo, Cheng Hou, Zhen Yang , et al. · 2022

Bragg grating (BG) filters play important roles in integrated photonics such as signal processing and optical sensing. In silicon-based counterpart photonic platforms, the application of narrow-bandwidth (Δ λ ) filters is often restrained …

Broadband nonvolatile electrically programmable silicon photonic switches Open

Zhuoran Fang, Johannes E. Fröch, Peipeng Xu, Jiajiu Zheng, Arka Majumdar · 2022

Programmable photonic integrated circuits (PICs) have recently gained significant interest due to their potential in creating next-generation technologies ranging from artificial neural networks and microwave photonics to quantum informati…

Turnkey generation of Kerr soliton microcombs on thin-film lithium niobate on insulator microresonators powered by the photorefractive effect Open

Zongxing Lin, Zhe Kang, Peipeng Xu, Ye Tian, Sailing He · 2021

Generation of Kerr soliton microcombs on microresonators enables power-efficient, phase-coherent, and broadband frequency teeth generation, which has revolutionized a wide range of scientific areas such as astronomy, metrology, spectroscop…

Helicity-dependent continuous varifocal metalens based on bilayer dielectric metasurfaces Open

Yanqun Wang, Li Chen, Shiwei Tang, Peipeng Xu, Fei Ding , et al. · 2021

Metasurfaces offer a unique platform to realize flat lenses, reducing the size and complexity of imaging systems and thus enabling new imaging modalities. In this paper, we designed a bilayer helicity-dependent continuous varifocal dielect…

High-Q, submicron-confined chalcogenide microring resonators Open

Zhen Yang, Rizhen Zhang, Zhiyuan Wang, Peipeng Xu, Wei Zhang , et al. · 2021

We demonstrate high quality ( Q ) factor microring resonators in high index-contrast GeSbSe chalcogenide glass waveguides using electron-beam lithography followed by plasma dry etching. A microring resonator with a radius of 90 μm shows an…

Low loss and dispersion engineered ZnSe waveguides at telecom wavelengths Open

Yiming Fang, Zhen Yang, Chengdong Li, Peipeng Xu, Kunlun Yan , et al. · 2021

We have successfully fabricated a dispersion engineered ZnSe waveguide. The ZnSe film was deposited on a CaF2 substrate by radio frequency magnetron sputtering, and the waveguide was patterned directly on the ZnSe films by UV lithography a…

High quality, high index-contrast chalcogenide microdisk resonators Open

Rizhen Zhang, Zhen Yang, Mingyue Zhao, Peipeng Xu, Wei Zhang , et al. · 2021

We demonstrate the high quality ( Q ) factor microdisk resonators in high index-contrast chalcogenide glass (ChG) film GeSbSe using electron-beam lithography followed by plasma dry etching. High confinement, low-loss, and single-point-coup…

Silicon-Based TM0-to-TM3 Mode-Order Converter Using On-Chip Shallowly Etched Slot Metasurface Open

Chenxi Zhu, Yin Xu, Zhe Kang, Xin Hu, Yue Dong , et al. · 2021

Mode-order converters drive the on-chip applications of multimode silicon photonics. Here, we propose a TM0-to-TM3 mode-order converter by leveraging a shallowly etched slot metasurface pattern atop the silicon waveguide, rather than as so…

The Adoption of Chalcogenide Glass Fiber as Pulse Stretcher in an All-Fiber Structured 2 μm Chirped Pulse Amplification System Open

Weiwang Zhang, Hongfei Ren, Juan Wang, Bin Yan, Junwei Zhu , et al. · 2021

We present the development of an As₂S₃ fiber-based reusable inline optical connector; and, for the first time to the best of our knowledge, integrated it into a 2 μm chirped pulse amplification system as the pulse str…

Ultra-low-power nonvolatile integrated photonic switches and modulators based on nanogap-enhanced phase-change waveguides Open

Jieying Zhang, Jiajiu Zheng, Peipeng Xu, Yanqun Wang, Arka Majumdar · 2020

We propose a nanogap-enhanced phase-change waveguide with silicon PIN heaters. Thanks to the enhanced light-matter interaction in the nanogap, the proposed structure exhibits strong attenuation (Δ α = ∼35 dB/µm) and optical phase (Δ n eff …

Nonvolatile Electrically Reconfigurable Integrated Photonic Switch Enabled by a Silicon PIN Diode Heater Open

Jiajiu Zheng, Zhuoran Fang, Changming Wu, Shifeng Zhu, Peipeng Xu , et al. · 2020

Reconfigurability of photonic integrated circuits (PICs) has become increasingly important due to the growing demands for electronic–photonic systems on a chip driven by emerging applications, including neuromorphic computing, quantum info…

Modeling Electrical Switching of Nonvolatile Phase-Change Integrated Nanophotonic Structures with Graphene Heaters Open

Jiajiu Zheng, Shifeng Zhu, Peipeng Xu, Scott T. Dunham, Arka Majumdar · 2020

Progress in integrated nanophotonics has enabled large-scale programmable photonic integrated circuits (PICs) for general-purpose electronic-photonic systems on a chip. Relying on the weak, volatile thermo-optic, or electro-optic effects, …

Ultra-broadband and compact polarizing beam splitter in silicon photonics Open

Fang Zhang, Jiajiu Zheng, Yipeng Song, Weixi Liu, Peipeng Xu , et al. · 2020

We design and experimentally demonstrate a polarizing beam splitter (PBS) on a silicon-on-insulator (SOI) platform based on an asymmetric directional coupler. The asymmetric directional coupler consists of a regular strip waveguide and a s…

Improving Indistinguishability of Single Photons from Colloidal Quantum Dots Using Nanocavities Open

Abhi Saxena, Yueyang Chen, Albert Ryou, Carlos G. Sevilla, Peipeng Xu , et al. · 2019

Colloidal quantum dots have garnered active research interest as quantum emitters due to their robust synthesis process and straightforward integration with nanophotonic platforms. However, obtaining indistinguishable photons from the coll…

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