1D Nanowires
One-dimensional (1D) semiconductor nanowires offer an ideal platform for creating miniaturized nano-devices for technologies such as electronics, photonics, photovoltaics and so forth. We synthesize semiconductor nanowires through vapor-liquid-solid (VLS) growth using our innovative chemical vapor deposition (CVD) system with control over the materials composition, crystal structure, doping, shape, and orientation. More precise tailoring of these parameters is being required to develop novel properties as well as to enhance the performances of nanowire-based devices.
Superlattices
Periodic modulation is the central principle to many physical effects in materials including electronic band structures of semiconductors, photonic band structures, and meta-optical properties. Creation of superlattices with different materials into structures that have been unachievable through conventional methods may pave the way for uncovering new and novel wave properties. Bottom-up synthesis and controlled self-assembly of nanomaterials enable the development of unique superlattice geometries and morphologies conventionally impossible to make. The Kim group develops ways to expand our ability to synthesize superlattices using dielectric and plasmonic nanomaterials.
Photonics
The Kim group studies nanophotonic/meta-optical properties of novel superlattices prepared with nanoscale precision. Research efforts have enabled nanowire superlattices to selectively couple and transport light as optical data, or to confine light waves for infinite lifetimes through optical bound states in the continuum. On the other hand, capacitively-coupled Au nanocubes in DNA-engineered metacrystals exhibit unnaturally high refractive indices for future infrared technologies. The Kim groups combines materials synthesis with various spectroscopic techniques as well as computational modeling to build a clear tie among theory, synthesis and experimental validation.