Halide perovskites enable polaritonic XY spin Hamiltonian at room temperature
Nature Materials, June 2022
Exciton polaritons, the part-light and part-matter quasiparticles in semiconductor optical cavities, are promising for exploring Bose–Einstein condensation, non-equilibrium many-body physics and analogue simulation at elevated temperatures. However, a room-temperature polaritonic platform on par with the GaAs quantum wells grown by molecular beam epitaxy at low temperatures remains elusive... [Read More]
Direct electrical modulation of second-order optical susceptibility via phase transitions
Nature Electronics, Oct 2021
Electrical modulation of nonlinear optical signals is crucial for emerging applications in communications and photonic circuits. However, current methods of modulating the second-order optical susceptibility involve indirectly and inefficiently changing the third-order susceptibility. Here we show that electrical switching of the crystal structure of monolayer molybdenum ditelluride can be used to directly modulate the second-order susceptibility... [Read More]
Topological Corner Modes Induced by Dirac Vortices in Arbitrary Geometry
Physical Review Letters, Jun 2021
Recently, higher-order topologies have been experimentally realized, featuring topological corner modes (TCMs) between adjacent topologically distinct domains. However, they have to comply with specific spatial symmetries of underlying lattices, hence their TCMs only emerge in very limited geometries, which significantly impedes generic applications. Here, we report a general scheme of inducing TCMs in arbitrary geometry based on Dirac vortices from aperiodic Kekul´e modulations... [Read More]
Atomic-scale ion transistor with ultrahigh diffusivity
Science, Apr 2021
Biological ion channels rapidly and selectively gate ion transport through atomic-scale filters to maintain vital life functions. We report an atomic-scale ion transistor exhibiting ultrafast and highly selective ion transport controlled by electrical gating in graphene channels around 3 angstroms in height, made from a single flake of reduced graphene oxide... [Read More]
Recent Publications
Recent News
May 2021: Our recent work on ion transport was highlighted in Hong Kong University News.
March 2021: Our recent work on quantum optics was highlighted in Berkeley Engineering News.
Nov 2020: Dr. Sui Yang has been selected as the final winner of Rising Stars of Light 2020.
Jul 2020: Our lab alumnus Dr. Haokun Li has won the Award for Chinese Outstanding Self-financed Students Abroad.
Jul 2020: Dr. Sui Yang has won Microsystem & Nanoengineering Young Scientist Award.
Jul 2020: Our lab alumnus Prof. Cheng Gong has won IUPAP Young Scientst Prize in Semiconductor Physics of 2020.
Feb 2020: Our lab alumnus Prof. Liang Feng has won 2020 Sloan Research Fellowship in Physics.
Jun 2019: Our work on quantum trapping was selected in Physics World Top 10 Breakthroughs for 2019
Dec 2019: Our lab alumnus Prof. Junsuk Rho has won Korean PECASE Award.
Dec 2019: Our recent work on heat transfer was highlighted in Nature, Berkeley News, Science News, and Scientific American.
Feb 2019: Our lab alumnus Prof. Volker J. Sorger has received a 2019 PECASE Award.
Jun 2019: Our recent work on quantum trapping was highlighted in Physics World, Berkeley News, and Ars Technica.
Feb 2019: Our lab alumnus Prof. Liang Feng has received a 2019 NSF CAREER Award.