UIM Electromagnetic Waves
Microwave Spatial Modulation
Chiral light-matter interaction
vdW materials & Valleytronics
Plasmonics and metamaterials using nanoparticles
When chiral emitters couple to resonance modes of optical resonators, the decay rate of chiral emitters changes significantly.
This research discovered the chiral Purcell effect to explain the principle of the modified decay rate of chiral emitters.
To support the chiral Purcell effect, I also suggested designs of resonators, such as the double fishnet structure and the nano-hole metasurface.
 SeokJae Yoo, Minhaeng Cho, and Q-Han Park, Globally enhanced chiral field generation by negative-index metamaterials, Physical Review B 89, 161405 (2014). http://dx.doi.org/10.1103/PhysRevB.89.161405
 SeokJae Yoo, and Q-Han Park, Chiral light-matter interaction in optical resonators, Physical Review Letters 114, 20, 203003 (2015) http://link.aps.org/doi/10.1103/PhysRevLett.114.203003
 SeokJae Yoo, and Q-Han Park, Enhancement of Chiroptical Signals by Circular Differential Mie Scattering of Nanoparticles, Scientific Reports (2015)