493 citations · 4k across the 35 of their papers we have counts for
35 papers
Thermo-optic phase shifter based on hydrogen-doped indium oxide microheater
Weiyu Tong, Erqi Yang, Yu Pang +6
Thermo-optic (TO) phase shifters are very fundamental units in large-scale active silicon photonic integrated circuits (PICs). However, due to the limitation of microheater materia…
Machine learning reconstruction of depth-dependent thermal conductivity profile from pump-probe thermoreflectance signals
Zeyu Xiang, Yu Pang, Xin Qian +1
Characterizing materials with spatially varying thermal conductivities is significant to unveil the structure-property relation for a wide range of functional materials, such as ch…
A new spatial-scan thermoreflectance method to measure a broad range of anisotropic in-plane thermal conductivity
Puqing Jiang, Dihui Wang, Zeyu Xiang +2
In-plane thermal conductivities of small-scale samples are hard to measure, especially for the lowly conductive ones and those lacking in-plane symmetry (i.e., transversely anisotr…
Confinement Effect on Thermopower of Electrolytes
Xin Qian, Te-Huan Liu, Ronggui Yang
Ionic Seebeck effect of electrolytes has shown promising applications in harvesting energy from low-grade waste-heat sources with small temperature difference from the environment,…
Machine Learning for Predicting Thermal Transport Properties of Solids
Xin Qian, Ronggui Yang
Quantitative descriptions of the structure-thermal property correlation have been a bottleneck in designing materials with superb thermal properties. In the past decade, the first-…
Passive sub-ambient cooling: radiative cooling versus evaporative cooling
Ablimit Aili, Xiaobo Yin, Ronggui Yang
Day-and-night radiative sky cooling has emerged as a potential alternative to conventional cooling technologies such as refrigeration-based air conditioning and evaporative wet coo…
Thermal Conductivity Modeling using Machine Learning Potentials: Application to Crystalline and Amorphous Silicon
Xin Qian, Shenyou Peng, Xiaobo Li +2
First-principles based modeling on phonon dynamics and transport using density functional theory and Boltzmann transport equation has proven powerful in predicting thermal conducti…
Temperature Effect on Phonon Dispersion Stability of Zirconium by Machine Learning-driven Atomistic Simulations
Xin Qian, Ronggui Yang
It is well known that conventional harmonic lattice dynamics cannot be applied to energetically unstable crystals at 0 K, such as high temperature body centered cubic (BCC) phase o…
Three-Dimensional Anisotropic Thermal Conductivity Tensor of Single Crystalline \b{eta}-Ga2O3
Puqing Jiang, Xin Qian, Xiaobo Li +1
\b{eta}-Ga2O3 has attracted considerable interest in recent years for high power electronics, where thermal properties of \b{eta}-Ga2O3 play a critical role. The thermal conductivi…
Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials
Puqing Jiang, Xin Qian, Ronggui Yang
Measuring thermal properties of materials is not only of fundamental importance in understanding the transport processes of energy carriers (electrons and phonons) but also of prac…
Thermal conductivity of polymers and polymer nanocomposites
Congliang Huang, Xin Qian, Ronggui Yang
Polymers are widely used in industry and in our daily life because of their diverse functionality, light weight, low cost and excellent chemical stability. However, on some applica…
Anisotropic thermal transport in bulk hexagonal boron nitride
Puqing Jiang, Xin Qian, Ronggui Yang +1
Hexagonal boron nitride (h-BN) has received great interest in recent years as a wide bandgap analog of graphene-derived systems. However, the thermal transport properties of h-BN,…
A new elliptical-beam method based on time-domain thermoreflectance (TDTR) to measure the in-plane anisotropic thermal conductivity and its comparison with the beam-offset method
Puqing Jiang, Xin Qian, Ronggui Yang
Materials lacking in-plane symmetry are ubiquitous in a wide range of applications such as electronics, thermoelectrics, and high-temperature superconductors, in all of which the t…
Anisotropic Thermal Transport in Phase-Transition Layered 2D Alloys WSe2(1-x)Te2x
Xin Qian, Puqing Jiang, Peng Yu +3
Transition metal dichalcogenide (TMD) alloys have attracted great interests in recent years due to their tunable electronic properties, especially the semiconductor-metal phase tra…
Anisotropic Thermal Conductivity of 4H and 6H Silicon Carbide Measured Using Time-Domain Thermoreflectance
Xin Qian, Puqing Jiang, Ronggui Yang
Silicon carbide (SiC) is a wide bandgap (WBG) semiconductor with promising applications in high-power and high-frequency electronics. Among its many useful properties, the high the…
Phononic thermal properties of two-dimensional materials
Xiaokun Gu, Yujie Wei, Xiaobo Yin +2
Following the emergence of many novel two-dimensional (2-D) materials beyond graphene, interest has grown in exploring implications for fundamental physics and practical applicatio…
Time-domain thermoreflectance (TDTR) measurements of anisotropic thermal conductivity using a variable spot size approach
Puqing Jiang, Xin Qian, Ronggui Yang
It is challenging to characterize thermal conductivity of materials with strong anisotropy. In this work, we extend the time-domain thermoreflectance (TDTR) method with a variable…
Temperature dependence of anisotropic thermal conductivity tensor of bulk black phosphorus
Bo Sun, Xiaokun Gu, Qingsheng Zeng +5
To date, the intrinsic thermal conductivity tensor of bulk black phosphorus (BP), an important 2D material, is still unknown, since recent studies focus on BP flakes not on bulk BP…
Measurement Techniques for Thermal Conductivity and Interfacial Thermal Conductance of Bulk and Thin Film Materials
Dongliang Zhao, Xin Qian, Xiaokun Gu +2
Thermal conductivity and interfacial thermal conductance play crucial roles in the design of engineering systems where temperature and thermal stress are of concerns. To date, a va…
Phonon transport in single-layer Mo1-xWxS2 alloy embedded with WS2 nanodomains
Xiaokun Gu, Ronggui Yang
Two-dimensional (2-D) transition metal dichalcogenides (TMDs) have shown numerous interesting physical and chemical properties, making them promising materials for electronic, opto…
Super-stretchable borophene and its stability under straining
Zhenqian Pang, Xin Qian, Ronggui Yang +1
Recent success in synthesizing two-dimensional borophene on silver substrate attracts strong interest in exploring its possible extraordinary physical properties. By using the dens…
Lattice Thermal Conductivity of Organic-Inorganic Hybrid Perovskite CH3NH3PbI3
Xin Qian, Xiaokun Gu, Ronggui Yang
Great success has been achieved in improving the photovoltaic energy conversion efficiency of the organic-inorganic perovskite-based solar cells, but with very limited knowledge on…
Layer thickness-dependent phonon properties and thermal conductivity of MoS2
Xiaokun Gu, Baowen Li, Ronggui Yang
For conventional materials, the thermal conductivity of thin film is usually suppressed when the thickness decreases due to phonon-boundary scattering. However, this is not necessa…
Revealing the Anisotropic Thermal Conductivity of Black Phosphorus using the Time-Resolved Magneto-Optical Kerr Effect
Jie Zhu, Haechan Park, Jun-Yang Chen +11
Black phosphorus (BP) has emerged as a direct-bandgap semiconducting material with great application potentials in electronics, photonics, and energy conversion. Experimental chara…