A5058776065- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Mechanical and Optical Resonators
- Photonic Crystals and Applications
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Medical Imaging Techniques and Applications
- Advanced Neural Network Applications
- Robotics and Sensor-Based Localization
- Microwave Engineering and Waveguides
- Advanced Optical Imaging Technologies
- Advanced Image and Video Retrieval Techniques
- Quantum Information and Cryptography
- Photorefractive and Nonlinear Optics
- Quantum optics and atomic interactions
- Advanced X-ray and CT Imaging
- Digital Holography and Microscopy
- Advanced X-ray Imaging Techniques
- Near-Field Optical Microscopy
- Advanced Fluorescence Microscopy Techniques
- Advanced Frequency and Time Standards
- Computer Graphics and Visualization Techniques
- Orbital Angular Momentum in Optics
Yanshan University
2025
University of Maryland, College Park
2023-2024
Theiss Research
2023-2024
National Institute of Standards and Technology
2023-2024
Physical Measurement Laboratory
2023-2024
Material Measurement Laboratory
2024
Purdue University West Lafayette
2015-2021
Samsung (South Korea)
2020-2021
Institute of Nanotechnology
2021
Gwangju Institute of Science and Technology
2018
Optical resonators with high quality factors (Qs) are promising for a variety of applications due to the enhanced nonlinearity and increased photonic density states at resonances. In particular, frequency combs (FCs) can be generated through four-wave mixing in high-Q microresonators made from Kerr nonlinear materials such as silica, silicon nitride, magnesium fluoride, calcium fluoride. These devices have potential on-chip metrology high-resolution spectroscopy, high-bandwidth...
Quantum frequency combs from chip-scale integrated sources are promising candidates for scalable and robust quantum information processing (QIP).However, to use these domain QIP, demonstration of entanglement in the basis, showing that entangled photons a coherent superposition multiple bins, is required.We present verification qubit qutrit frequency-bin using an on-chip comb with 40 mode pairs, through two-photon interference measurement based on electro-optic phase modulation.Our...
Ultra-compact, densely integrated optical components manufactured on a CMOS-foundry platform are highly desirable for information processing and electronic-photonic co-integration. However, the large spatial extent of evanescent waves arising from nanoscale confinement, ubiquitous in silicon photonic devices, causes significant cross-talk scattering loss. Here, we demonstrate that anisotropic all-dielectric metamaterials open new degree freedom total internal reflection to shorten decay...
Kerr nonlinearity based frequency combs and solitons have been generated from on-chip optical microresonators with high quality factors global or local anomalous dispersion. However, fabrication of such resonators usually requires materials and/or processes that are not standard in semiconductor manufacturing facilities. Moreover, certain regimes as visible ultra-violet, the large normal material dispersion makes it extremely difficult to achieve Here we present a concentric racetrack-shaped...
Sensing platforms based upon photonic integrated circuits have shown considerable promise; however, they require corresponding advancements in optical readout technologies. Here, we present an on-chip spectrometer that leverages thin-film lithium niobate modulator to produce a frequency-agile electro-optic frequency comb for interrogating chip-scale temperature and acceleration sensors. The chirped process allows ultralow radiofrequency drive voltages, which are as much seven orders of...
In many physical systems, the interaction with an open environment leads to energy dissipation and reduced coherence, making it challenging control these systems effectively. context of wave phenomena, such lossy interactions can be specifically controlled isolate system, a condition known as bound-state-in-continuum (BIC). Despite recent advances in engineered BICs for photonic waveguiding, practical implementations are still largely polarization- geometry-specific, underlying principles...
<title>Abstract</title> Object detection using Unmanned Aerial Vehicles (UAVs) has emerged as a crit- ical application across diverse domains. However, the wide-angle views of drones often result in images containing high density small objects, posing chal- lenges for object such few learnable features, significant occlusion, and an imbalanced distribution positive negative samples. To address these issues, this paper introduces AGLC-YOLO, enhanced version YOLOv7 architecture specifically...
We present a direct strip-slot waveguide mode coupler without any auxiliary structures. Contrary to popular belief, an apparent mismatch between strip and slot does not deteriorate conversion efficiency. Separated electric magnetic field distributions in lead highly efficient modal coupling the result high Accurate experimental characterization shows that is capable of up 96% efficiency with broad bandwidth. Being simplest efficiency, can encourage potential applications waveguides.
We investigate the effect of waveguide surface roughness on coupling efficiency between silicon inverse tapers and lensed fibers. Short taper lengths 30-50 micrometers are shown to achieve minimum loss.
Phase imaging microscopy, based either on holography or nonholographic methods such as phase retrieval, has seen considerable attention recently. retrieval offers the advantage of being free a reference arm and enables more stable compact setup. We present an optical setup that provides enhanced resolution by implementing synthetic aperture using electrically tunable lens (ETL). The ETL is less expensive alternative to computerized translation stages spatial light modulators. Before applying...
We propose a fiber-to-chip edge coupler based on trident-shaped dielectric metamaterial. Experiment shows < 2 dB/facet coupling loss with high NA fiber and near 0.5 using lensed at the best polarization.
We present a monolithic InP-based photonic integrated circuit (PIC) consisting of widely tunable laser master oscillator feeding an array semiconductor optical amplifiers that are interferometrically combined on-chip in single-mode waveguide. demonstrate stable and efficient coherent beam combination obtain up to 240 mW average power from the PIC, with 30–50 kHz Schawlow-Townes linewidths >180 across extended C-band. also explored hybrid integration amplifier PIC high quality factor...
This paper compares the effectiveness, flexibility and speed of two CT reprojection polychromaticity algorithms generalized to scans involving three attenuators. Specifically, we address problem beam hardening in water bone taken by xray beams traversing varying amounts aluminum prefiltration. The methods are roughly equivalent effectiveness. One has advantage generality; other, speed.
By engineering atomic geometries composed of nearly 1000 segments embedded in micro-resonators, we observe Bragg resonances induced by the lattice at telecommunication wavelength. The geometrical arrangement erbium atoms into a inside silicon nitride (SiN) microring resonator reduces scattering loss wavelength commensurate with lattice. We confirm dependency light emission to positions and spacing also Fano interference between resonant modes system.
Public transportation has become more important as natural resources are exhausted and environmental pollution increases. However, there many factors that interrupt the use of public transportation, including cost, in-out vehicle time, level service transfer. To encourage local governments have reduced transport transfer fares, thereby eliminating a major obstacle. key issues beyond cost large effect on passenger usage transportation. This study estimates effects choices at change...
In the field of x-ray reconstruction tomography, many sets attenuation data are gathered at various angular orientations to object. Each set is divided into individual elements where each element represents a single pencil beam measurement attenuated x-rays some perpendicular distance from origin. Given this scheme collection, it reasonable ask following question: For given diameter, more important collect projection - views, or per rays? The answer question basic design computer assisted...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text Y. Xuan, Liu, X. Xue, P. Wang, J. B. Niu, K. Han, M. Teng, D. E. Leaird, A. Weiner, and Qi, "High-Q Silicon Nitride Microresonator for Low Power Frequency Comb Initiation at Normal Dispersion Regime," in CLEO: 2015, OSA Technical Digest (online) (Optica Publishing Group, 2015), paper STu1I.6. Export BibTex Endnote (RIS) HTML Plain alert Save article
Using a laser light source in imaging devices provides wide color gamut, high brightness, resolution, and efficiency. At the same time, it creates speckle pattern that deteriorates image quality. This paper is related to application of moving binary code diffractive optical element (DOE) for suppression display. Analytical optimization DOE parameters made this paper. The optimal pitch found analytically. Limitation length shown, highest possible estimated. Application compound Barker design...
We present a fiber-to-chip coupler using asymmetric double slot waveguide and direct strip-slot mode coupling to shorten transition while maintaining high efficiency. Experimental result shows 1.8 dB insertion loss with broad bandwidth.
For the first time, we present a verification of frequency-bin entanglement and phase coherence an on-chip biphoton frequency comb through novel two-photon interference measurement scheme estimation density matrix.