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| Date : 2009/06/10, Hit : 1061 |
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| 제목 |
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세미나(6/12): 레이저 초미세 가공연구-울산과기대 기형선 교수 |
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| 작성자 |
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S.H.Cho |
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| 화일 |
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나노공정장비연구실에서는 아래와 같이 세미나를 개최합니다.
관심있으신분들의 많은 참석 부탁드림니다.
일시: 6월 12일 (금) 14:00-
세미나 명: Exploring and Exploiting Laser Material Interactions in Thermal and Nonthermal Regimes
연사명: 울산과기대 기형선 교수
장소: 연구6동 세미나실(1층)
초록:
Lasers have found extensive use in a wide variety of applications in many branches of science and engineering: High beam-quality, high power lasers have been employed in many challenging manufacturing processes, and nanosecond to femtosecond pulsed lasers are extensively used in micro-/nanoscale applications.
Laser material interaction is a complex research field, and the potential of the state-of-the-art lasers can be fully realized only when the interaction phenomena between a laser beam and material are thoroughly understood.
In this talk, numerical and experimental studies of laser material interactions in nonthermal and thermal regimes are presented with several application areas, such as laser drilling, laser keyhole welding, DPSSL laser interaction with silicon, femtosecond laser ablation, and laser plasma interaction. In laser material interactions in thermal regimes, an emphasis is placed on the roles of multiple reflections, evaporation, and homogeneous boiling near the critical point. Capillary, thermocapillary, and recoil pressure effects, which are the major driving forces for the melt flow, are accounted for in the numerical model. For laser material interaction in the nonthermal regime, femtosecond laser pulse interactions with silicon and laser plasma interaction are studied numerically, in reference to the ionization process induced by the intense electromagnetic field of the laser pulse. This study explains some physical phenomena pertaining to only femtosecond laser pulses, such as the existence of threshold intensity.
문의 : 조성학(7077)
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