610 citations · 2.5k across the 16 of their papers we have counts for
17 papers
Soliton generation in AlGaAs microresonators at room temperature
Lue Wu, Weiqiang Xie, Chao Xiang +7
Chip-integrated optical frequency combs are attractive optical sources in comb applications requiring high-repetition-rate, low power consumption, or compact size. Spontaneous soli…
Ultralow voltage, High-speed, and Energy-efficient Cryogenic Electro-Optic Modulator
Paolo Pintus, Anshuman Singh, Weiqiang Xie +7
Photonic integrated circuits (PICs) at cryogenic temperatures enable a wide range of applications in scalable classical and quantum systems for computing and sensing. A promising a…
Sub-milliwatt, widely-tunable coherent microcomb generation with feedback-free operation
Haowen Shu, Lin Chang, Chenghao Lao +11
Microcombs are revolutionizing optoelectronics by providing parallelized, mutually coherent wavelength channels for time-frequency metrology and information processing. To implemen…
Probing material absorption and optical nonlinearity of integrated photonic materials
Maodong Gao, Qi-Fan Yang, Qing-Xin Ji +12
Optical microresonators with high quality () factors are essential to a wide range of integrated photonic devices. Steady efforts have been directed towards increasing microreso…
Bridging microcombs and silicon photonic engines for optoelectronics systems
Haowen Shu, Lin Chang, Yuansheng Tao +12
Microcombs have sparked a surge of applications over the last decade, ranging from optical communications to metrology. Despite their diverse deployment, most microcomb-based syste…
High-performance lasers for fully integrated silicon nitride photonics
Chao Xiang, Joel Guo, Warren Jin +12
Silicon nitride (SiN) waveguides with ultra-low optical loss enable integrated photonic applications including low noise, narrow linewidth lasers, chip-scale nonlinear photonics, a…
Laser soliton microcombs on silicon
Chao Xiang, Junqiu Liu, Joel Guo +10
Silicon photonics enables wafer-scale integration of optical functionalities on chip. A silicon-based laser frequency combs could significantly expand the applications of silicon p…
Ultra-bright entangled-photon pair generation from an AlGaAs-on-insulator microring resonator
Trevor J. Steiner, Joshua E. Castro, Lin Chang +5
Entangled-photon pairs are an essential resource for quantum information technologies. Chip-scale sources of entangled pairs have been integrated with various photonic platforms, i…
Efficient resonance management in ultrahigh-Q one-dimensional photonic crystal nanocavities fabricated on 300 mm SOI CMOS platform
Weiqiang Xie, Peter Verheyen, Marianna Pantouvaki +2
Photonic crystal (PhC) nanocavities have demonstrated unique capabilities in terms of light confinement and manipulation. As such, they are becoming attractive for the design of no…
Ultrahigh-Q AlGaAs-on-insulator microresonators for integrated nonlinear photonics
Weiqiang Xie, Lin Chang, Haowen Shu +4
Aluminum gallium arsenide (AlGaAs) and related III-V semiconductors have excellent optoelectronic properties. They also possess strong material nonlinearity as well as high refract…
Dissipative Kerr Solitons in a III-V Microresonator
Gregory Moille, Lin Chang, Weiqiang Xie +5
We demonstrate stable microresonator Kerr soliton frequency combs in a III-V platform (AlGaAs on SiO) through quenching of thermorefractive effects by cryogenic cooling to temp…
Integrated turnkey soliton microcombs operated at CMOS frequencies
Boqiang Shen, Lin Chang, Junqiu Liu +14
While soliton microcombs offer the potential for integration of powerful frequency metrology and precision spectroscopy systems, their operation requires complex startup and feedba…
Ultra-efficient frequency comb generation in AlGaAs-on-insulator microresonators
Lin Chang, Weiqiang Xie, Haowen Shu +13
Recent advances in nonlinear optics have revolutionized the area of integrated photonics, providing on-chip solutions to a wide range of new applications. Currently, the state of t…
On-chip polarization rotator for type I second harmonic generation
Eric J. Stanton, Lin Chang, Weiqiang Xie +12
We demonstrate a polarization rotator integrated at the output of a GaAs waveguide producing type I second harmonic generation (SHG). Form-birefringent phase matching between the p…
Dense III-V/Si Phase-Shifter Based Optical Phased Array
Weiqiang Xie, Tin Komljenovic, Jinxi Huang +2
High-performance integrated optical phased arrays (OPAs) are crucial for building up energy-efficient solid-state beam steering systems on a chip. This work demonstrates a first he…
On-Chip Integrated Quantum-Dot Silicon-Nitride Microdisk Lasers
Weiqiang Xie, Thilo Stöferle, Gabriele Rainò +8
Hybrid SiN-QD microlasers coupled to a passive SiN output waveguide with 7μm diameter and record low threshold density of 27 μJ cm-2 are demonstrated. A new design and unique proce…
Diffraction limited centimeter scale radiator: metasurface grating antenna for phased array LiDAR
Weiqiang Xie, Jinxi Huang, Tin Komljenovic +2
In this paper, we demonstrate a radiation-strength-chirped metasurface centimeter-long grating antenna, whose beam quality is approaching the diffraction limit in its footprint wit…