We are a research group in the Mechanical Engineering department at Caltech, led by Professor Austin Minnich. Our lab's research focus is on understanding and engineering nanoscale heat transport for applications in the energy field like thermoelectric waste heat recovery. We use a variety of experimental and theoretical techniques to investigate nanoscale transport processes, with a particular emphasis on ultrafast optical techniques. We invite you to look at the website for more details about our work and facilities.


Zoila, Peishi, and Erika successfully pass candidacy. Congrats! May 31, 2017

Chengyun's work on phonon transmission spectra was publish in Physical Review B. May 15, 2017

Nate, Taeyong, and Junlong gave talks at the 2017 Spring MRS Conference. April 22, 2017

Lina publishes her work on low frequency thermal modes in Si and SiGe in Scientific Reports. March 14, 2017

Congrats to Austin for receiving tenure as a Professor in Mechanical Engineering and Applied Physics at Caltech. March 7, 2017

Junlong publishes his work on daytime radiative cooling in ACS Photonics. February 3, 2017

Jaeyun publishes his work on MD simulations of amorphous SiGe nanocomposites in RSC Advances. October 31, 2016

Congrats to Zoila for successfully passing her MCE Qualifying Exam! September 23, 2016

Congrats to Navaneeth for successfully defending his PhD thesis! August 15, 2016

News Archive


imagePaper published in Physical Review B

This work reports the first measurement of the Fresnel transmission coefficients for thermal phonons at a metal-semiconductor interface using ab-initio phonon transport modeling and a thermal characterization technique. March 14, 2017

imagePaper published in Nature Scientific Reports

Using a variance-reduced Monte Carlo method with the full phonon dispersion and intrinsic lifetimes from first-principles as input, we examine phonon transport in nanocrystalline SiGe alloys with ab-initio electronphonon scattering rates. Our calculations show that low energy phonons still transport substantial amounts of heat in these materials. March 14, 2017

imagePaper published in ACS Photonics

We demonstrate that a polymer-coated fused silica mirror, as a near-ideal blackbody in the mid-infrared and near-ideal reflector in the solar spectrum, achieves radiative cooling below ambient air temperature under direct sunlight by 8.2 degrees. . February 3, 2017