korean english


Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다. 4시부터 2층 라운지세미나실에 다과를 준비하오니 많은 참석 부탁드립니다 아 래 1. 제 목: Nanoimprint lithography and its application to nano-structured optical devices 2. 연 사: 이 기 동 박사 (LG 전자기술원) 3. 일 시: 2007년 10월 12일(금) 오후4:30 4. 장 소: 물리학과세미나실(31355호실) 5. 초 록: Nanoimprint lithography (NIL) is being considered as one of the strongest candidates for the next-generation lithography which can replace the current optical lithography. It is also expected to be widely used in the industry including semiconductor, display, and storage media etc. Among the wide spectrum of application fields, NIL is expected to find its short-term application in the area of optical devices with nanoscale structures. In this talk, with the introduction to the NIL technology, two optical devices with nano-scale subwavelength structure fabricated by NIL will be discussed. (1) Wire grid polarizer (WGP) is one of key optical components for projection displays with liquid crystal micro-display. Although WGP with 140 nm pitch is commercially available now, it still poses a problem with low extinction ratio (ER) for blue color. Since the ER can be increased by reducing the pitch, fabrication of a WGP with 100 nm pitch was attempted by NIL. We successfully developed thermal nanoimprint and aluminum dry etching processes. Fabricated WGPs showed twice higher ER than 140 nm pitch one. (2) Photonic crystal (PC) structures on LED have been known to enhance the light extraction significantly. Although e-beam lithography has been used for the proof of principle, it is far from real production method. We applied thermal NIL to fabricate PC structures in p-GaN layer of green LED. To identify the PC effect, two structures were fabricated and compared. One structure makes the green light of 525 nm wavelength fall within the photonic band gap (PBG) while the other puts it outside of PBG. The former structure showed 10- fold increment of photoluminescence compared to LED without PC structures, while the latter showed only 6-fold increment
번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1057196
681 2019학년도 2학기 콜로퀴움 일정 2019.07.17 424496
680 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 358014
679 <Mar.3(Wed.)>Scaling laws in Natural Language Processing 2021.02.25 315912
678 2017학년도 1학기 콜로퀴움 일정 2017.01.05 282854
677 <10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films 2006.10.25 263707
676 2020학년도 1학기 콜로퀴움 일정 2020.01.31 253168
675 <5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가? 2012.05.10 251445
674 <3/14>Adaptive Optics for the Human Eye and Ophthalmic Applications 2008.03.12 234630
673 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 234310
672 <11/6> Graphene plasmon and Plasmonics 2013.10.31 234149
671 <6/11> Advanced Physiological Optics and Its Ophthalmic Applications 2014.05.28 228858
670 <8/30(Wed.)10:30>​Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics 2017.08.29 227431
669 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 225698
668 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 225485
667 <Jan.14(Thu.)>Oxygen sponge effects for epitaxial manganite thin film design 2021.01.11 214418
666 <5/16(토)> 세미나 개최 안내 2015.05.18 205765
665 <11/5(화)> 특별세미나 개최 안내 2013.11.01 203054
664 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 197843
663 <Sep. 23(Wed.) 4:30 PM>Grain boundary effect in Metal : A journey of discovery from crystal to thin films without grain boundaries 2015.09.16 196880