Zobrazeno 1 - 10
of 285
pro vyhledávání: '"Dai-sik Kim"'
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract Electromagnetic absorbers based on ultra-thin metallic film are desirable for many applications such as plasmonics, metamaterials, and long-wavelength detectors. A metallic film will achieve a maximum 50% of electromagnetic wave absorption,
Externí odkaz:
https://doaj.org/article/6a82e8971648448cac3ca78ba4d3ecae
Publikováno v:
Micromachines, Vol 14, Iss 11, p 1991 (2023)
Metallic nanogaps have been studied for many years in the context of a significant amount of field enhancements. Nanogaps of macroscopic lengths for long-wave applications have attracted much interest, and recently one dimensional tunable nanogaps ha
Externí odkaz:
https://doaj.org/article/d97d12a7627442e7a6aab6724387e2c1
Publikováno v:
APL Photonics, Vol 8, Iss 3, Pp 036107-036107-6 (2023)
We demonstrated that an incident terahertz peak field amplitude below 0.01 MV/cm can trigger Zener tunneling in a semi-insulating GaAs. Moreover, a transmission decrease with an extinction ratio of 60% was observed in the semi-insulating GaAs with an
Externí odkaz:
https://doaj.org/article/7c28541c00974f3d99be618ee6d823bd
Autor:
Hwanhee Kim, Mahsa Haddadi Moghaddam, Zhihao Wang, Sunghwan Kim, Dukhyung Lee, Hyosim Yang, Myongsoo Jee, Daehwan Park, Dai-Sik Kim
Publikováno v:
Nanomaterials, Vol 13, Iss 18, p 2526 (2023)
A flexible zerogap metallic structure is periodically formed, healing metal cracks on a flexible substrate. Zerogap is continuously tunable from nearly zero to one hundred nanometers by applying compressive strains on the flexible substrate. However,
Externí odkaz:
https://doaj.org/article/d96201d868e24332ab155ef80348b489
Publikováno v:
Advanced Photonics Research, Vol 3, Iss 11, Pp n/a-n/a (2022)
With the rapid advancement of 5G/6G communications using millimeter wavelengths, the concomitant usage of these long wavelength radiation for remote sensing and monitoring of biological and chemical agents is anticipated. However, the ability to dete
Externí odkaz:
https://doaj.org/article/2f43c63583154d75aa8a624d6fd7c14b
Autor:
Dukhyung Lee, Dasom Kim, Dai-Sik Kim, Hyeong-Ryeol Park, Changhee Sohn, Seon Namgung, Kunook Chung, Young Chul Jun, Dong Kyun Kim, Hyuck Choo, Young-Geun Roh
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-6 (2021)
Abstract One critical factor for bolometer sensitivity is efficient electromagnetic heating of thermistor materials, which plasmonic nanogap structures can provide through the electric field enhancement. In this report, using finite element method si
Externí odkaz:
https://doaj.org/article/e14be9b975fc41e8a223302a3387c0c2
Publikováno v:
iScience, Vol 25, Iss 4, Pp 104033- (2022)
Summary: In the terahertz (THz) electromagnetic wave regime, which has recently received great attention in the fields of communication and security, shielding of THz waves is a significant issue. Therefore, carbon-based nanostructures or polymer–c
Externí odkaz:
https://doaj.org/article/aee83849bbe242e39eef063672774322
Autor:
Taehee Kang, R. H. Joon-Yeon Kim, Geunchang Choi, Jaiu Lee, Hyunwoo Park, Hyeongtag Jeon, Cheol-Hwan Park, Dai-Sik Kim
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018)
Many experiments have been performed that study rectification by exciting electrons to tunnel across a single quantum barrier. Here, the authors take a 2-dimensional approach by combining 2D closed-loop tunneling barriers with broken symmetry to enab
Externí odkaz:
https://doaj.org/article/b1d54a35f3af40bb9dfa809bc1277def
Autor:
Sunghwan Kim, Bamadev Das, Kang Hyeon Ji, Mahsa Haddadi Moghaddam, Cheng Chen, Jongjin Cha, Seon Namgung, Dukhyung Lee, Dai-Sik Kim
Publikováno v:
Nanophotonics. 12:1481-1489
Cracks are formed along the photolithographically pre-determined lines with extremely high yield and repeatability, when Cu clusters are introduced between planarized Au thin films sequentially deposited on a PET substrate. These clusters act as nano
Autor:
Hyosim Yang, Dai-Sik Kim, Richard H. Joon-Yeon Kim, Jae Sung Ahn, Taehee Kang, Jeeyoon Jeong, Dukhyung Lee
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-6 (2018)
Abstract Slot antennas have been exploited as important building blocks of optical magnetism because their radiations are invoked by the magnetic fields along the axes, as vectorial Babinet principle predicts. However, optical magnetism of a few-nano
Externí odkaz:
https://doaj.org/article/0d60a3d825cd4c3ea29cb4ee3bb5353f