Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Kwang Jun Ahn"'
Publikováno v:
Advanced Photonics Research, Vol 5, Iss 1, Pp n/a-n/a (2024)
Terahertz (THz) waves occupy the electromagnetic spectrum between microwave and infrared radiation, with frequencies typically ranging from 0.1 to 10 THz. Compared with other optic and electronic tools, this frequency range allows for unique sensing
Externí odkaz:
https://doaj.org/article/66e49aa440864ba5965be940e3b097fa
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:
Seongju Ha, Nam Hun Park, Hyeonkyeong Kim, Jiseon Shin, Jungseok Choi, Sungmin Park, Ji-Yun Moon, Kwanbyung Chae, Jeil Jung, Jae-Hyun Lee, Youngdong Yoo, Ji-Yong Park, Kwang Jun Ahn, Dong-Il Yeom
Publikováno v:
Light: Science & Applications, Vol 10, Iss 1, Pp 1-10 (2021)
Nonlinear optics: When graphene ‘does the twist’ Modifying the angle between the two layers of twisted bilayer graphene can considerably improve how photons interact with it to generate higher-energy photons. Dong-Il Yeom of Ajou University and c
Externí odkaz:
https://doaj.org/article/d955a95760b2410db370c13bdc49e166
Autor:
Cong Tai Trinh, Duong Nguyen Minh, Van Long Nguyen, Kwang Jun Ahn, Youngjong Kang, Kwang-Geol Lee
Publikováno v:
APL Materials, Vol 8, Iss 3, Pp 031102-031102-7 (2020)
Lead halide perovskite has emerged as a potential material for a wide range of applications, including solar cells, light-emitting diode displays, lasing, and single photon emitters. To optimize their utilization in optoelectronic devices, the fundam
Externí odkaz:
https://doaj.org/article/20c601bfcf2245c0998d2609a1d06e48
Autor:
Seung-Hyun Kim, Won Seok Han, Tae-Young Jeong, Hyang-Rok Lee, H. Jeong, D. Lee, Seung-Bo Shim, Dai-Sik Kim, Kwang Jun Ahn, Ki-Ju Yee
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
Abstract We report surface plasmon (SP) lasing in metal/semiconductor nanostructures, where one-dimensional periodic silver slit gratings are placed on top of an InGaAsP layer. The SP nature of the lasing is confirmed from the emission wavelength gov
Externí odkaz:
https://doaj.org/article/3b66495388f14f039f1b9d8c2a129ca3
Autor:
Jun Wan Kim, Sun Young Choi, Shanmugam Aravazhi, Markus Pollnau, Uwe Griebner, Valentin Petrov, Sukang Bae, Kwang Jun Ahn, Dong-Il Yeom, Fabian Rotermund
Publikováno v:
AIP Advances, Vol 5, Iss 1, Pp 017110-017110-6 (2015)
A diode-pumped Yb:KYW planar waveguide laser, single-mode Q-switched by evanescent-field interaction with graphene, is demonstrated for the first time. Few-layer graphene grown by chemical vapor deposition is transferred onto the top of a guiding lay
Externí odkaz:
https://doaj.org/article/77b82627d069436290dde5c8b96400f5
Autor:
Gangseon Ji, Hwan Sik Kim, Seong Ho Cha, Hyoung-Taek Lee, Hye Ju Kim, Sang Woon Lee, Kwang Jun Ahn, Kyoung-Ho Kim, Yeong Hwan Ahn, Hyeong-Ryeol Park
Publikováno v:
Nanophotonics. 12:147-154
We demonstrated an ultra-sensitive terahertz virus detection method combined with virus-sized gold nanogaps filled with Al2O3. Large-area high-density 20 nm-gap rectangular loop structures, containing a resonant frequency in the terahertz range, were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::438231917c78c90dd734f0bf62d323fa
https://doi.org/10.1515/nanoph-2022-0706
https://doi.org/10.1515/nanoph-2022-0706
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
Scientific Reports
Scientific Reports
Organic–inorganic halide perovskite nanocrystals or quantum dots (PQDs) are excellent candidates for optoelectronic applications, such as lasers, solar cells, light emitting diodes, and single photon sources. However, the potential applications of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f420b769d08730d4174f22bae173bc8
http://link.springer.com/article/10.1038/s41598-020-58926-3
http://link.springer.com/article/10.1038/s41598-020-58926-3
Autor:
Kwang Jun Ahn
Publikováno v:
Optics express. 29(24)
Electrons in indirect semiconductors can optically transit between the valance and conduction band edges only when the momentum conservation is satisfied with help of a third quasi-particle, such as a phonon. In this report, we theoretically demonstr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ee51b6a982e4fee1001e1e1b2061b33
https://pubmed.ncbi.nlm.nih.gov/34809382
https://pubmed.ncbi.nlm.nih.gov/34809382
Autor:
Hyunwoo, Kim, Seunghyun, Moon, Jongwoo, Kim, Sang Hwan, Nam, Dong Hwan, Kim, Jeong Seop, Lee, Kyoung-Ho, Kim, Evan S H, Kang, Kwang Jun, Ahn, Taewan, Kim, ChaeHo, Shin, Yung Doug, Suh
Publikováno v:
Nanoscale. 13(10)
Plasmonic coupling of metallic nanostructures with two-dimensional molybdenum disulfide (MoS2) atomic layers is an important topic because it provides a pathway to manipulate the optoelectronic properties and to overcome the limited optical cross-sec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::9af6162bcad03c94373d8f0dae59f533
https://pubmed.ncbi.nlm.nih.gov/33656502
https://pubmed.ncbi.nlm.nih.gov/33656502