Welcome to the Ultrafast NanoOptics Group!
We are interested in light-matter interactions in condensed matter physics, with an emphasis on novel physical phenomena emerging in nanoscale structures and at surfaces and interfaces. Using laser spectroscopy extending from the far-infrared to visible and UV and a scattering type Scanning near-field optical microscopy, we have spatial sensitivity down to individual nanostructures and femtosecond temporal resolution.
We are associated with the Physics Department at the University of California, Berkeley; the Materials Sciences Division of Lawrence Berkeley National Laboratory, and the Kavli Energy NanoSciences Institute.
July 2016: Sheng passed the qualifying examination. Congratulation!
May 2016: Our work on Soliton-dependent plasmon reflection at bilayer graphene domain walls has been published in Nature Materials (Link)
Sep 2015: Our work on characterization and manipulation of individual defects in insulating boron nitride has been published in Nature Nanotechnology (Link)
May 2015: Long and Jonghwan get their PhDs!! Congrats guys!
May 2015: Our work on designing “diatomic” high Q tunable dielectric gratings is published in Optics Express (Link)
December 2014: Our work on Optimizing Broadband Terahertz Modulation with Hybrid Graphene/Metasurface Structures is published in Nano Letters (Link)
December 2014: Our work on using circularly polarized light to manipulate valley degree of freedom in WSe2 is published in Science (Link)
October 2014: Our work on observing intrinsic bandage and Landau level renormalization in Graphene/BN heterostructure has been published in Nature Communications (Link)
October 2014: Our work on determining gate-dependent pseudo spin mixing term in Graphene/BN superlattices has been published in Nature Physics (Link)
August 2014: Our work on probing local strain at MX2-Metal boundaries with surface plasmon enhanced raman scattering has been published in Nano Letters (Link).
August 2014: Our work on ultrafast charge transfer between atomically thin MoS2/WS2 hetereolayers has been published in Nature Nanotechnology (Link).
June 2014: Our work on absorption cross-section determination of individual carbon nanotubes is published in PNAS (Link).
May 2014: Xiaoping gets the first Wang Lab PhD! Congrats Xiaoping, we’ll miss you!
Update Date: September/2015