Zobrazeno 1 - 10
of 1 867
pro vyhledávání: '"Chul Kang"'
Autor:
Hyeongmun Kim, Chul Kang, Dogeun Jang, Yulan Roh, Sang Hwa Lee, Joong Wook Lee, Jae Hee Sung, Seong Ku Lee, Ki-Yong Kim
Publikováno v:
Light: Science & Applications, Vol 13, Iss 1, Pp 1-13 (2024)
Abstract Terahertz (THz) waves, known as non-ionizing radiation owing to their low photon energies, can actually ionize atoms and molecules when a sufficiently large number of THz photons are concentrated in time and space. Here, we demonstrate the g
Externí odkaz:
https://doaj.org/article/71a8dd17d3134c638b815357d53759b5
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-7 (2023)
Abstract Graphene-based optical modulators have been extensively studied owing to the high mobility and tunable permittivity of graphene. However, weak graphene-light interactions make it difficult to achieve a high modulation depth with low energy c
Externí odkaz:
https://doaj.org/article/c88916b57fb94f588646c0eb5e338007
Autor:
Taegyu Pak, Mohammad Rezaei-Pandari, Sang Beom Kim, Geonwoo Lee, Dae Hee Wi, Calin Ioan Hojbota, Mohammad Mirzaie, Hyeongmun Kim, Jae Hee Sung, Seong Ku Lee, Chul Kang, Ki-Yong Kim
Publikováno v:
Light: Science & Applications, Vol 12, Iss 1, Pp 1-11 (2023)
The electrons, accelerated by the laser ponderomotive force and subsequent plasma wakefields, radiate broadband emission continuously along the laser propagation direction, resulting in multi-mJ THz radiation in the far field.
Externí odkaz:
https://doaj.org/article/facf31a2fb2049e983fd6e51d0c281c3
Publikováno v:
Nanomaterials, Vol 13, Iss 13, p 1948 (2023)
Graphene quantum dots (GQDs) with a band gap have been widely applied in many fields owing to their unique optical properties. To better utilize the optical advantages of GQDs, it is important to understand their optical characteristics. Our study de
Externí odkaz:
https://doaj.org/article/387f0ea1522243f9927a5d7333e8a174
Publikováno v:
Advanced Science, Vol 9, Iss 21, Pp n/a-n/a (2022)
Abstract Topological materials have significant potential for spintronic applications owing to their superior spin–charge interconversion. Here, the spin‐to‐charge conversion (SCC) characteristics of epitaxial Bi1−xSbx films is investigated a
Externí odkaz:
https://doaj.org/article/95e21ffdfa2d466b81c44a2b172a1a7e
Publikováno v:
AIP Advances, Vol 9, Iss 12, Pp 125320-125320-4 (2019)
In mechanical engineering, truss structures have attracted much attention because of their mechanical strength and light weight. However, electromagnetic properties of truss structures have been rarely reported. We experimentally and numerically inve
Externí odkaz:
https://doaj.org/article/db5df01cf16e4736abaec21c7bbfcc22
Autor:
Inhee Maeng, Gyuseok Lee, Chul Kang, Gun Wu Ju, Kwangwook Park, Seoung-Bum Son, Yong-Tak Lee, Chul-Sik Kee
Publikováno v:
AIP Advances, Vol 8, Iss 12, Pp 125027-125027-7 (2018)
Remarkably strong emission of terahertz radiation from illuminated GaAs microstructures on a Si substrate is reported. The peak–to–peak amplitude of terahertz radiation from the sample is 9 times larger than that of THz radiation from a semi-insu
Externí odkaz:
https://doaj.org/article/4d81afa2291c413ab865aaea9fcdd59c
Autor:
Chul Kang, Gyuseok Lee, Woo-Jung Lee, Dae-Hyung Cho, Inhee Maeng, Yong-Duck Chung, Chul-Sik Kee
Publikováno v:
Crystals, Vol 11, Iss 4, p 411 (2021)
We investigated THz emission from Ar-ion-implanted Cu(In,Ga)Se2 (CIGS) films. THz radiation from the CIGS films increases as the density of implanted Ar ions increases. This is because Ar ions contribute to an increase in the surface surge current de
Externí odkaz:
https://doaj.org/article/dda913dd17974d2eb697cf8968c170d1
Autor:
Hyung Keun Yoo, Soo Bin Cho, Sae June Park, Yeong Hwan Ahn, Chul Kang, In-Wook Hwang, Joong Wook Lee
Publikováno v:
Applied Sciences, Vol 11, Iss 6, p 2765 (2021)
Optically controlled spectral-band selective terahertz (THz) modulators based on metal-organic hybrid metamaterials were investigated. An artificially structured material, which consists of two single split-ring resonators put together on the split g
Externí odkaz:
https://doaj.org/article/82c46908f988460b91a750ff03f05e17
Autor:
Inhee Maeng, Asuka Matsuyama, Jung-Ho Yun, Shenghao Wang, Chul Kang, Chul-Sik Kee, Masakazu Nakamura, Min-Cherl Jung
Publikováno v:
Nanomaterials, Vol 10, Iss 4, p 721 (2020)
To control the density of a CH3NH2 molecular defect, which strongly contributed to a significant THz-wave absorption property in the CH3NH3PbI3 hybrid perovskite thin film formed by the sequential vacuum evaporation method, we performed post-annealin
Externí odkaz:
https://doaj.org/article/b6295354952d43bca2bc90fb2fc74994