스포츠 토토 라이브 스코어PHYSICS/BK21 Colloquium[09.11.06]
관련링크
본문
| “Photonic crystals, metamaterials, and quantum metamaterials” Ø* Speaker :토토 커뮤니티 순위Prof. Jeong Weon Wu [Ewha Womans University] Ø* Place : Physics Seminar Room (Science Bldg, 3-201) Ø* Date & Time : Oct,토토 커뮤니티 순위30(Fri)토토 커뮤니티 순위4:00 ~ 5:00 pm ØAbstract In an optical medium possessing a spatial distribution토토 커뮤니티 순위of토토 커뮤니티 순위refractive토토 커뮤니티 순위index토토 커뮤니티 순위with토토 커뮤니티 순위periodicity on the order of wavelength, there exists a photonic band gap토토 커뮤니티 순위similar토토 커뮤니티 순위to토토 커뮤니티 순위the토토 커뮤니티 순위band토토 커뮤니티 순위gap토토 커뮤니티 순위in semiconductors.토토 커뮤니티 순위We call these optical medium the photonic crystals. By varying the incident light intensity or by use of external electric field, the band gap of토토 커뮤니티 순위photonic토토 커뮤니티 순위crystal토토 커뮤니티 순위can토토 커뮤니티 순위be controlled, which enables a realization of various photonic switching. Artificial optical media possessing the spatial distribution of refractive index토토 커뮤니티 순위smaller토토 커뮤니티 순위than토토 커뮤니티 순위wavelength토토 커뮤니티 순위are토토 커뮤니티 순위called metamaterials. When the spatial distribution is on the order of micrometer, THz metamaterials can be obtained, while the optical metamaterials can토토 커뮤니티 순위be토토 커뮤니티 순위realized토토 커뮤니티 순위in토토 커뮤니티 순위the토토 커뮤니티 순위nano-structured artificial optical medium.토토 커뮤니티 순위In these metamaterials,토토 커뮤니티 순위the optical property not existing in토토 커뮤니티 순위nature can be observed and a variety of new symmetric structures can be designed. By manipulating the boundaries of graphenes,토토 커뮤니티 순위the propagation of De Broglies wave can be tailored, which is called quantum metamaterial. In quatum토토 커뮤니티 순위metamaterials,토토 커뮤니티 순위phenomena토토 커뮤니티 순위can토토 커뮤니티 순위observed토토 커뮤니티 순위those appearing in optical metamaterials such as negative refraction and collimation. Contact Person : Prof. Hu-Jong Lee (054-279-2072, ,hjlee@postech.ac.kr) |
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