Research

The research of our lab is focused on studying ultrafast nonlinear optical effects and ultrafast dynamics of the light-matter strongly coupled systems. These coupled systems can be realized by combining the optical modes of the artificial nanostructures and the elementary excitations (excitons, plasmons, phonons,…) of the semiconductor films. In addition, we will also devote to the applications of such polaritonic systems in optoelectronic devices.

• Ultrafast active control of optical fields under strong light-matter coupling

Ultrafast active control of optical fields provides an efficient way to realize high-speed optical switches, optical modulators and optical computing. To meet the requirements of these applications, we mainly focus on how to manipulate the optical intensity, polarization, phase, frequency and coherence efficiently at femtosecond timescales under strong coupling.

• Ultrafast dynamics of exciton-polaritons in light-matter hybrid systems

Ultrafast dynamics of exciton-polaritons plays an important role in understanding the nonequilibrium state of light-matter interactions. By applying time-resolved optical spectroscopy, we devoted to studying the selection rules of the molecular polaritonic transitions, and will focus on the polariton lifetime in the strongly coupled low-dimensional semiconductors.

• Optoelectronic devices based on polaritonics

Polaritons are quasiparticles that result from the strong coupling between elementary excitations and light. It can exhibit the properties of both materials (strong intrinsic nonlinearities) and photons (high speed), which facilitates its applications in high-speed optoelectronic devices. Based on this, we will explore the applications of polaritonic systems on high-speed photodetectors, optical modulators, polaritonic transistors etc.