Spectroscopy provides valuable information for materials. Our group has developed hyperspectral imaging systems for the two main applications: i) hyperspectral microscopic characterization of materials and photonic devices, ii) ultrasensitive hyperspectral biosensing platforms. Recently, we have revealed microscopic origins for the low efficiency of green LEDs using our hyperspectral imaging microscope. We also develop ultrasensitive hyperspectral biosensing platforms using plasmonic nanoparticles and nanomaterials for the detection of toxic molecules.

Publication Highlights

• Young-Chul Leem, Zhenyao Fang, Yun-Kyung Lee, Na-Yeong Kim, Arvin Kakekhani, Wenjing Liu, Sung-Pyo Cho, Cheolsu Kim, Yuhui Wang, Zhurun Ji, Abhirup Patra, Leeor Kronik, Andrew M. Rappe, Sang-Youp Yim, Ritesh Agarwal, "Optically Triggered Emergent Mesostructures in Monolayer WS2," Nano Letters 24, 5436 (2024).

• Soogeun Kim, Sang-Hyun Hong, Joon Heon Kim, Myoung-Kyu Oh, Tae Joong Eom, Yang Ho Park, Gil Ho Shin, Sang-Youp Yim, "Early on–site detection of strawberry anthracnose using portable Raman spectroscopy," Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 303, 123150 (2023).

• Na-Yeong Kim, Young-Chul Leem, Sang-Hyun Hong, Jin-Ho Park, Sang-Youp Yim, "Ultrasensitive and stable plasmonic surface-enhanced Raman scattering substrates covered with atomically thin monolayers: effect of the insulating property," ACS Applied Materials & Interfaces 11, 6363 (2019).

• Young-Chul Leem, Sang-Youp Yim, "Microscopic observation of low efficiency in green light-emitting diodes," ACS Photonics 5, 1129 (2018).