Metasurface-driven optically variable devices

C Jung, G Kim, M Jeong, J Jang, Z Dong… - Chemical …, 2021‏ - ACS Publications
Optically variable devices (OVDs) are in tremendous demand as optical indicators against
the increasing threat of counterfeiting. Conventional OVDs are exposed to the danger of …

Nanoimprint lithography for high-throughput fabrication of metasurfaces

DK Oh, T Lee, B Ko, T Badloe, JG Ok, J Rho - Frontiers of Optoelectronics, 2021‏ - Springer
Metasurfaces are composed of periodic sub-wavelength nanostructures and exhibit optical
properties that are not found in nature. They have been widely investigated for optical …

Self-assembled photonic cavities with atomic-scale confinement

AN Babar, TAS Weis, K Tsoukalas, S Kadkhodazadeh… - Nature, 2023‏ - nature.com
Despite tremendous progress in research on self-assembled nanotechnological building
blocks, such as macromolecules, nanowires and two-dimensional materials, synthetic self …

Hydrogels for active photonics

B Ko, N Jeon, J Kim, H Kang, J Seong, S Yun… - Microsystems & …, 2024‏ - nature.com
Conventional photonic devices exhibit static optical properties that are design-dependent,
including the material's refractive index and geometrical parameters. However, they still …

Nanoparticle Assembly: From Self‐Organization to Controlled Micropatterning for Enhanced Functionalities

S Jambhulkar, D Ravichandran, Y Zhu, V Thippanna… - Small, 2024‏ - Wiley Online Library
Nanoparticles form long‐range micropatterns via self‐assembly or directed self‐assembly
with superior mechanical, electrical, optical, magnetic, chemical, and other functional …

Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability

C Jung, Y Yang, J Jang, T Badloe, T Lee, J Mun… - …, 2020‏ - degruyter.com
Structural coloration using metasurfaces has been steadily researched to overcome the
limitations of conventional color printing using pigments by improving the resolution …

Recent progress on ultrathin metalenses for flat optics

SW Moon, Y Kim, G Yoon, J Rho - Iscience, 2020‏ - cell.com
As technology advances, electrical devices such as smartphones have become more and
more compact, leading to a demand for the continuous miniaturization of optical …

Recent advances in quantum nanophotonics: plexcitonic and vibro-polaritonic strong coupling and its biomedical and chemical applications

Y Kim, A Barulin, S Kim, LP Lee, I Kim - Nanophotonics, 2023‏ - degruyter.com
The fundamental understanding of molecular quantum electrodynamics via the strong light–
matter interactions between a nanophotonic cavity and quantum emitters opens various …

Vanadium dioxide for dynamically tunable photonics

B Ko, T Badloe, J Rho - ChemNanoMat, 2021‏ - Wiley Online Library
As the quest for active photonic devices continues, materials with exotic and exploitable
properties have become paramount to enable new advancements. In recent years, phase …

All-water etching-free electron beam lithography for on-chip nanomaterials

X Wang, X Dai, H Wang, J Wang, Q Chen, F Chen… - ACS …, 2023‏ - ACS Publications
Electron beam lithography uses an accelerated electron beam to fabricate patterning on an
electron-beam-sensitive resist but requires complex dry etching or lift-off processes to …