Zobrazeno 1 - 10 of 117 pro vyhledávání: '"Cha Hwan Oh"'
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Akademický článek
Observation of exceptional points in reconfigurable non-Hermitian vector-field holographic lattices
Autor: Choloong Hahn, Youngsun Choi, Jae Woong Yoon, Seok Ho Song, Cha Hwan Oh, Pierre Berini
Publikováno v: Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
Non-Hermitian Hamiltonians have attracted significant attention because of the unconventional wave-dynamic effects they allow. Here, Hahn et al. report reconfigurable non-Hermitian photonic lattices that permit versatile control of real and imaginary
Externí odkaz: https://doaj.org/article/c447c400cab24cc3a1e2ead8acb914d1
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5
A study on the E-H mode transition with the line integrated He 23S metastable atom density in an inductively coupled plasma
Autor: Cha-Hwan Oh, Wonwook Lee, Sungyong Shim, Jin Woo Park
Publikováno v: Current Applied Physics. 28:7-12
Helium (He) inductively coupled plasma (ICP) was generated by a right-helical-type RF antenna. At a fixed He pressure of 20 mTorr, the optical emission spectrum from the He plasma was measured with RF power. The E-H mode transition and the characteri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e5f25f72e602f67b30c4ee0123380c3e
https://doi.org/10.1016/j.cap.2021.04.015
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7
Accelerated Signal Processing of Burst-Mode Streamline Data for Low-Power Embedded Multi-Channel LiDAR Systems
Autor: Daejin Park, Cha-Hwan Oh, Sanghoon Lee, Taewon Chong
Publikováno v: 2021 IEEE Region 10 Symposium (TENSYMP).
Autonomous driving vehicle such as car or auto-mated guided vehicle (AGV), requires sensors to detect obstacles in its surrounding environment and feed the information back to the vehicle control system. Light detection and ranging (LiDAR) sensors, w
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ae20350778e849a892b71432f2915a01
https://doi.org/10.1109/tensymp52854.2021.9550895
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9
Study on the laser collisional induced fluorescence spectrum of helium plasmas
Autor: Jinsoo Ryu, Wonwook Lee, Cha-Hwan Oh
Publikováno v: Physics Letters A. 388:127077
Helium (He) RF plasma source was configured to study laser collisional induced fluorescence (LCIF) spectrum of He plasma. When laser beam with wavelength of 396.5 nm resonant to the 2 1 S − 4 1 P transition line was incident on He plasmas LCIF spec
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6ba68c8b779ce9d1e7e502010fff611f
https://doi.org/10.1016/j.physleta.2020.127077
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10
Unidirectional Bragg Gratings Using Parity-Time Symmetry Breaking in Plasmonic Systems
Autor: Pierre Berini, Cha-Hwan Oh, Elham Karami Keshmarzi, R. Niall Tait, Choloong Hahn, Seok Ho Song
Publikováno v: IEEE Journal of Selected Topics in Quantum Electronics. 22:48-59
Optical systems following concepts of parity-time (PT) symmetry have attracted significant attention because of their extraordinary behavior such as unidirectional reflectance or power oscillation. PT symmetric optical systems are realized by judicio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec3f4c237d5d4be25fb6eb7d0c80105d
https://doi.org/10.1109/jstqe.2016.2519825
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