A5040173098- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Hydraulic Fracturing and Reservoir Analysis
- Neural Networks and Reservoir Computing
- Quantum Information and Cryptography
- Photonic Crystals and Applications
- Drilling and Well Engineering
- Plasmonic and Surface Plasmon Research
- Quantum optics and atomic interactions
- Orbital Angular Momentum in Optics
- Mechanical and Optical Resonators
- Quantum Computing Algorithms and Architecture
- Oil and Gas Production Techniques
- Semiconductor Lasers and Optical Devices
- Hydrocarbon exploration and reservoir analysis
- Photorefractive and Nonlinear Optics
- Advanced Fiber Optic Sensors
- Reservoir Engineering and Simulation Methods
- Enhanced Oil Recovery Techniques
- Seismic Imaging and Inversion Techniques
- Advanced Optical Network Technologies
- Terahertz technology and applications
- Optical Coatings and Gratings
Technical University of Denmark
2016-2025
Northeast Forestry University
2024
Harbin Normal University
2022-2024
Research Institute of Petroleum Exploration and Development
2014-2023
China Telecom
2023
Huazhong University of Science and Technology
2007-2023
Wuhan National Laboratory for Optoelectronics
2009-2023
Ørsted (Denmark)
2011-2023
China Telecom (China)
2023
China National Petroleum Corporation (China)
1998-2022
The ability to control multidimensional quantum systems is key for the investigation of fundamental science and development advanced technologies. Here we demonstrate a integrated photonic platform able robustly generate, analyze high-dimensional entanglement. We realize programmable bipartite entangled system with dimension up $15 \times 15$ on large-scale silicon-photonics circuit. device integrates more than 550 components single chip, including 16 identical photon-pair sources. verify...
We demonstrate a novel on-chip two-mode division multiplexing circuit using tapered directional coupler-based TE 0 &TE 1 mode multiplexer and demultiplexer on the silicon-on-insulator platform.A low insertion loss (0.3 dB), crosstalk (< -16 wide bandwidth (~100 nm), large fabrication tolerance (20 nm) are measured.An onchip experiment is carried out fabricated with non return-to-zero (NRZ) on-off keying (OOK) signals at 40 Gbit/s.The experimental results show clear eye diagrams moderate...
Quantum Key Distribution (QKD) provides an efficient means to exchange information in unconditionally secure way. Historically, QKD protocols have been based on binary signal formats, such as two polarisation states, and the transmitted efficiency of quantum key is intrinsically limited 1 bit/photon. Here we propose experimentally demonstrate, for first time, a high-dimensional protocol space division multiplexing multicore fiber using silicon photonic integrated lightwave circuits. We...
Graphene opens up for novel optoelectronic applications thanks to its high carrier mobility, ultra-large absorption bandwidth, and extremely fast material response. In particular, the opportunity control properties through tuning of Fermi level enables electro-optical modulation, optical-optical switching, other optoelectronics applications. However, achieving a modulation depth remains challenge because modest graphene-light interaction in graphene-silicon devices, typically, utilizing only...
We design and fabricate an ultrahigh coupling efficiency (CE) fully etched apodized grating coupler on the silicon-on-insulator (SOI) platform using subwavelength photonic crystals bonded aluminum mirror. Fabrication error sensitivity angle dependence are experimentally investigated. A record CE of −0.58 dB with a 3 bandwidth 71 nm low back reflection demonstrated.
We design and experimentally verify a topology optimized low-loss broadband two-mode (de-)multiplexer, which is (de-)multiplexing the fundamental first-order transverse-electric modes in silicon photonic wire. The device has footprint of 2.6 µm x 4.22 exhibits loss <1.2 dB 100 nm bandwidth measured around 1570 nm. cross talk <-12 extinction ratio >14 C-band. Furthermore, we demonstrate that method can be expanded to include more modes, this case including also second order mode, while...
Slow light has been widely utilized to obtain enhanced nonlinearities, spontaneous emissions, and increased phase shifts owing its ability promote light-matter interactions. By incorporating a graphene microheater on slow-light silicon photonic crystal waveguide, we experimentally demonstrated an energy-efficient with tuning efficiency of 1.07 nm/mW power consumption per free spectral range 3.99 mW. The rise decay times (10% 90%) were only 750 ns 525 ns, which, the best our knowledge, are...
Abstract Controlling and programming quantum devices to process information by the unit of dit, i.e., qudit, provides possibilities for noise-resilient communications, delicate molecular simulations, efficient computations, showing great potential enhance capabilities qubit-based technologies. Here, we report a programmable qudit-based processor in silicon-photonic integrated circuits demonstrate its enhancement computational parallelism. The monolithically integrates all key functionalities...
Abstract Graphs have provided an expressive mathematical tool to model quantum-mechanical devices and systems. In particular, it has been recently discovered that graph theory can be used describe design quantum components, devices, setups systems, based on the two-dimensional lattice of parametric nonlinear optical crystals linear circuits, different standard photonic framework. Realizing such graph-theoretical hardware, however, remains extremely challenging experimentally using...
A compact and efficient polarization splitting rotating device built on the silicon-on-insulator platform is introduced, which can be readily used for interface section of a diversity circuit.The compact, with total length few tens microns.It also simple, consisting only two parallel wire waveguides different widths, thus requiring no additional nonstandard fabrication steps.A insertion loss 0.6dB an extinction ratio 12dB have been obtained experimentally in whole C-band. ©2011 Optical...
We present an efficient method to design apodized grating couplers with Gaussian output profiles for coupling between standard single mode fibers and silicon chips. An coupler using fully etched photonic crystal holes on the silicon-on-insulator platform is designed, fabricated in a step of lithography etching. ultralow loss −1.74 dB (67% efficiency) 3 bandwidth 60 nm experimentally measured.
We have designed and for the first time experimentally verified a topology optimized mode converter with footprint of ~6.3 μm × ~3.6 which converts fundamental even to higher order odd dispersion engineered photonic crystal waveguide.2D 3D optimization is utilized both schemes result in designs theoretically showing an extinction ratio larger than 21 dB.The design has estimated insertion loss lower ~2 dB ~43 nm bandwidth.The conversion confirmed this wavelength range by recording profiles...
A polarization splitter and rotator (PSR) based on a tapered directional coupler with relaxed fabrication tolerance is proposed demonstrated the silicon-on-insulator platform.The device simply constructed by parallel-coupling narrow silicon waveguide linearly wider waveguide.Compared to previously reported PSRs normal coupler, which suffer from stringent requirements accuracy of width, introduced structure wide can be used compensate errors waveguide.In addition, only single step exposure...
A novel and simple bandwidth wavelength-tunable optical bandpass filter based on silicon microrings in a Mach-Zehnder interferometer (MZI) structure is proposed demonstrated.In this design, the drop transmissions of two microring resonators are combined to provide desired tunability.A detailed analysis design device presented.The shape factor extinction ratio optimized by thermally controlling phase difference between arms MZI.Simultaneous wavelength tunability with in-band ripple control...
We propose and demonstrate a polarization splitter rotator (PSR) built on silicon-on-insulator platform. The PSR is constructed with tapered waveguide followed by 2×2 multimode interferometer can be simply fabricated in single lithography etching step. A low insertion loss (<2.5 dB minimum of 0.6 dB) crosstalk (<-12 over wide operation bandwidth (~100 nm) large fabrication tolerance (>50 are experimentally demonstrated.
Surface plasmon polaritons enable light concentration within subwavelength regions, and here we demonstrate efficient compact graphene-plasmonic modulators fully integrated in the silicon-on-insulator platform.
Going beyond two-state qubits, $q\phantom{\rule{0}{0ex}}u\phantom{\rule{0}{0ex}}d\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}s$ based on quantum states of high dimension constitute a rich resource in information, and their exploitation will play prominent role next-generation technologies. Generation manipulation qudits have improved strongly over the last decades; reliable transmission between remote locations remains central challenge. The authors use an air-core...
High-dimensional quantum key distribution (QKD) allows achievement of information-theoretic secure communications, providing high key-generation rates, which cannot, in principle, be obtained by QKD protocols with binary encoding. Nonetheless, the amount experimental resources needed increases as states to detected belong a larger Hilbert space, thus raising costs practical high-dimensional systems. Here, we present an alternative scheme for fiber-based four-dimensional QKD, time and phase...
We theoretically and experimentally investigate a metasurface supporting silicon-slot quasi-bound state in the continuum (qBIC) mode resonating near-infrared spectrum. The is composed of circular slots etched silicon layer on sapphire substrate. symmetry unit cell reduced order to provide access symmetry-protected mode, whose properties are investigated by finite-element full-wave eigenfrequency analysis. measured transmittance spectra verify excitation qBIC with experimental quality factors...
An optical phased array (OPA), the most promising non-mechanical beam steering technique, has great potential for solid-state light detection and ranging systems, holographic imaging, free-space communications. A high quality with low sidelobes is crucial long-distance transmission detection. However, previously reported OPAs suffer from sidelobe levels, few efforts are devoted to reducing levels in both azimuthal ( φ ) polar θ directions. To solve this issue, we propose a...
An efficient TE–TM polarization converter built on a silicon-on-insulator nanophotonic platform is demonstrated. The strong cross-polarization coupling effect in air-cladded photonic-wire waveguides employed to realize the conversion. A peak efficiency of 87% (−0.6 dB insertion loss) measured experimentally. conversion >92% with an overall loss <−1.6 obtained wavelength range 40 nm. proposed device compact, total length 44 μm and can be fabricated one lithography etching step.
An ultra-compact and broadband higher order-mode pass filter in a 1D photonic crystal silicon waveguide is proposed experimentally demonstrated. The designed for the lower order mode to work band gap, while located air band. Consequently, light on prohibited through filter, can be converted Bloch with low insertion loss. As an example, we fabricate ∼15-μm-long first-order-mode that filters out fundamental provides measured loss of ∼1.8 dB signals. extinction ratio around 50 (with variation...