Research Funding
InnoCORE Program , 2026-2031
한국연구재단 우수신진연구(유형B), 2026-2030
한국연구재단 우수신진연구(씨앗), 2025~2026
UNIST 기관고유사업, 2025 ~ 2030
한국기초과학지원연구원 국가연구시설장비진흥센터(NFEC) 신진연구자 인프라 지원사업 (첨단인프라 트랙), 2025~2026
UNIST 신임교원 정착 과제, 2024-2027
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Micro/Nano Inorganic Materials Additive Manufacturing
Micro/Nano Inorganic Materials Additive Manufacturing
To meet the growing demand for functional micro- and nanoscale inorganic structures, additive manufacturing must expand beyond polymers toward direct 3D fabrication of metals, ceramics, semiconductors, and their heterogeneous combinations. These capabilities are critical for emerging applications in electronics, photonics, sensors, and energy devices. My research group will develop micro/nano inorganic additive manufacturing based on multiphoton laser processing, laser-induced conversion/sintering, and selective material deposition. Advanced beam shaping technology such as holography will enable high-throughput fabrication with submicron resolution, while metal-organic and ceramic precursor chemistries will allow direct formation of heterogeneous inorganic 3D structures.
3D Quantum Sensing Platform
3D Quantum Sensing Platform
Quantum sensing with nitrogen-vacancy centers in diamond has emerged as a powerful tool for measuring diverse physical parameters, yet the versatility of these measurement approaches is often limited by the achievable layout and dimensionality of bulk-crystal platforms. Here, we demonstrate a versatile approach to creating designer quantum sensors by surface-functionalizing multiphoton lithography microstructures with NV-containing nanodiamonds. We demonstrate a means to volumetrically image these structures using a refractive index matching confocal imaging technique, and extract ODMR spectra from 1.86 μm x 1.86 μm areas of highly concentrated nanodiamonds across a cross section of the gyroid. This approach to creating quantum-enabled microarchitectures opens new possibilities for multimodal sensing in complex three-dimensional environments.
Related Publications:
B. Blankenship‡, Y. Rho‡, et al, 2025, ACS Applied Materials & Interfaces, 17 (51) 69876–69884
High-Throughput Metrology for Semiconductor Packaging
High-Throughput Metrology for Semiconductor Packaging
The critical and immediate problems in many optoelectronics, sensors, and electrochemical devices are optical, thermal, and chemical degradation, which critically depend on the intrinsic surface/bulk defects and interfaces. These degradation processes often manifest in dynamic, far-from-equilibrium energy and mass transport. Therefore, this research track is focused on developing and implementing in-operando wide-field multimodal characterization for data-driven prediction of materials and device failure. This prediction can be used for decision making for selective defect repair and process optimization. The proposed in-operando wide-field diagnostics will offer a unique pathway to systematic investigation of dynamic physicochemical phenomena in operating devices, which will provide rich information for design and development of robust device platforms.
Related Publications:
Y. Rho et al., 2023, Optics Letters, 48 (14), 3789-3792
Y. Rho et al., 2024, Optics Express, 32 (15), 26632-26639
Semiconductor Materials Processing
Semiconductor Materials Processing
The semiconductor industry has evolved in accordance with the Moore's Law, progressing from microelectronics in the 1980s to nanoelectronics in the early 2000s, eventually venturing into atomic-scale quantum technology. High accuracy requirements, a significant hurdle to scalability, need innovative solutions for new technologies due to ultra-small allowable size deviations. Conventional plasma-based technologies with energetic particles in defect engineering, etching, doping, and materials deposition processes add another challenge in minimizing unwanted damage in atomic scale regions. Implementing multi laser beams will provide etchants, dopants, and depositing radicals to the surface via photochemical dissociation of chemical agents, followed by the direct laser beam illumination that promotes the etching, doping, and recrystallization in chemical and thermal processes. The proposed multi-laser beam assisted chemical processes can be applied to various atomically thin materials systems and quantum computing applications.
Related Publications:
Y. Rho‡ and K. Lee‡ et al., 2022, Nature Electronics, 5, 505–510
Y. Rho, et al., 2019, ACS Applied Materials & Interfaces, 11 (42), 39385-39393
Y. Rho‡ and H.Kim‡ et al, 2022, Advanced Materials Interfaces, 9 (23), 2200634
M. Eliceiri‡, Y. Rho‡, et al, 2023, Journal of Vacuum Science and Technology A , 41, 2, 022602
Femtosecond Ultrafast Probing
Femtosecond Ultrafast Probing
Ultrafast carrier dynamics (~1ps) in silicon nanowires can be extracted from an ultrafast scattering signal decaying curve obtained in nanoscale lateral resolution (~30nm). Our study enables a nanoimaging of ultrafast dynamics of materials properties, which will find promising applications in the future design of a broad range of electronic, photonic, and optoelectronic devices. The nanoscale temperature, chemistry, and photoconversion efficiency of the device will be in-situ probed by employing scanning thermal microscopy (SThM), photo-induced force microscopy (PiFM), and near-field photocurrent microscopy (SNPM), respectively,
Related Publications:
Y. Rho‡ and S.Yoo‡ et al., 2023 Nano Letters, 23 (5), 1843-1849
J. Li‡, R. Yang‡, Y. Rho*, 2023 Nano Letters, 23 (4), 1445–1450
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