in the PGS Group

Xingyu and Ananth’s paper on intraband cascade electroluminescence is published in Nature Photonics! 

Looking for PhD students and Postdocs 

We are looking for strongly motivated PhD students and Postdocs interested in our current experimental projects: 

  • Synthesis and characterization of “low toxicity” colloidal quantum dots, core/shells, films and inorganic matrix, with the characterization of the mid-infrared absorption and photoluminescence.  
  • Simulation and microfabrication of optically enhancing structures in the mid-infrared 
  • Studies of electronic, thermal, and thermoelectric transport of small gap quantum dot solids.  Exploring the noise and the limits of the mobility in the state-resolved transport regime. 
  • HgTe and HgSe colloidal quantum dot state of the art mid-infrared photodetector and emitter, using basic considerations to drive synthesis, processing and device architecture. 
  • Laser spectroscopy, time resolved recombination dynamics, Auger and stimulated emission studies, using a 1kHz, 1054nm, 6 ps laser system, with nonlinear crystal for mid-infrared wavelength conversion and mid-infrared up conversion.  

Please contact Professor Philippe Guyot-Sionnest by email, include a CV, and a brief but specific description of why you are interested in our research topics. 

Congrats to PGS for being elected AAAS fellow! 

Congrats to Philippe Guyot-Sionnest (aka PGS)  for being elected a fellow of the American Association for the Advancement of Science (AAAS).  Philippe thanks the friends who nominated him, the AAAS fellows who supported the nomination, and all the students and postdocs who made the contributions that led to the group’s recognition.    

Lab contributions include bright core/shell quantum dots that led to their use in bioimaging and TV displays, intraband quantum dot spectroscopy that may lead to mid-infrared detectors and emitters, and electronic doping and ligand exchange strategies that impart ohmic electrical conductivity to films of quantum dots.  Prior to joining UChicago, PGS developed nonlinear optical probes for molecular spectroscopy and ultrafast studies of liquid and solid interfaces.  

Philippe’s AAAS citation is for distinguished contributions to the physics and chemistry of nanomaterials, particularly fluorescent core-shell nanoparticles”.  This was a seminal contribution by Margaret Hines, who was the first Chemistry PhD student in the group, and it started with a stunningly green looking solution of CdSe/ZnS quantum dots that Margaret synthesized one late evening in the lab.  

Xingyu receives the Olshansky Graduate Student Travel Award for presenting her work at MRS fall 2022!

Congratulations to John, who won Best Poster at the ACS conference!

Ananth receives the Windt Graduate Student Travel Award 2022! He will be presenting his work at the MRS Spring 2022 Conference.

Chris’s review article on many-body dynamics in quantum dots is published in Chemical Reviews! 

Xin and Matt’s paper highlighted as a “breakthrough for infrared camera technology”

Xin and Matt devised a detector using quantum dots tuned to detect different parts of the infrared spectrum, allowing dual-band infrared imaging. You can read more about it in this UChicago News article, and the technical paper was published in Nature Photonics.

Menglu receives the Yodh Prize

Congratulations to Menglu! She has been awarded the Yodh Prize for outstanding graduate work in experimental physics.

Matt receives rhe Elizabeth R. Norton Prize

Congratulations to Matt! He has received the Elizabeth R. Norton Prize for excellence in chemistry research.