Recent News (updated 03/18/2019)

  • Delivered talk at CLEO 2019, San Jose, CA.
  • Got a Travel Grant Award from OTST 2019 Conference, Santa Fe, for my talk on 'THz emission spectroscopy on energy-relevant materials.'
  • Presented a poster at GRC Nanomaterials for Energy (2019) in Ventura, CA.
  • Co-first-authored paper accepted by Science Advances! 'Recording interfacial currents on the sub-nanometer length and femtosecond time scale by terahertz emission'. We uncovered charge transfer dynamics in 2D heterostructures directly via emitted THz radiation.
  • Our paper 'Giant Modal Gain Coefficients in II-VI Nanoplatelets' is accepted by Nano Letters! We showed modal gain exceeding 6,000 1/cm with an estimated material gain of 15,000 1/cm.
  • Got a symposium poster award at MRS Fall! My poster was titled 'Monitoring polaron formation dynamics in hybrid lead-halide perovskites.'

News Archive

  • Hosted Prof. Stephen Elliott from Cambridge University at the Stanford MatSci colloquium (May 25th). Another excellent talk!
  • Hosted Prof. Chris Murray from UPenn at the Stanford MatSci colloquium (May 18th). It was an excellent talk!
  • Delivered an invited talk on optical gain and lasing in colloidal nanocrystals at 233rd ECS Meeting in Seattle, WA (May 2018).
  • At SUPR-X (10th Stanford University Photonics Retreat) at Monterey, CA and presented my poster on THz emission from TMDC heterostructures (April 2018).
  • Presented THz emission in TMDC heterostructures and four-level optical gain in Type-II nanoplatelets at MRS Spring conference in Phoenix (March 2018).
  • SLAC published a news feature about our Advanced Materials paper that is highlighted by other news outlets (PhysOrg, NanoWerk, PVMagazine)
  • Hosted Prof. Naomi Ginsberg from UC Berkeley at the Stanford MatSci Colloquium (Feb 2nd).
  • Paper got accepted in Advanced Materials (selected as back cover article!): THz emission from hybrid perovskites
    • This papers shows THz radiation from hybrid perovskites upon optical excitation for the first time in the literature. The technique allowed to determine charge separation dynamics, individual carrier diffusivities and coupled carrier - lattice modes in hybrid perovskites. These results help to uncover surprising optoelectronic properties of hybrid perovskites such as high defect tolerance and long carrier lifetimes. This understanding will help designing cheap solar cell materials exhibiting outstanding device performances.
  • Presented THz emission in hybrid perovskites at Materials Research Society (MRS) Fall Meeting in Boston (Dec 2017).
  • Hosted Dr. Matthew Beard from National Renewable Energy Labs (NREL) at the Stanford MatSci Colloquium (Nov 17th).
  • At Argonne National Labs (Advanced Photon Source) to perform time-resolved X-ray scattering experiments (Nov 2017)
  • Paper got accepted by the Journal of Physical Chemistry Letters: High efficiency optical gain in Type-II nanocrystals
    • This paper shows record-high optical gain coefficients achieved in alloyed colloidal nanocrystals. This is enabled by unique electronic structure realized in a core - crown nanoplatelet architecture allowing for a four-level optical gain in the nanocrystals. These light-emitting nanomaterials accomplished exceptional optical gain performance realizing ultralow thresholds and long lifetimes. These materials will be exciting for lasers!
  • At European XFEL to perform ultrafast X-ray scattering experiments - the first solid-state experiment of XFEL! (Oct 2017)