지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2007.3
- 수록면
- 34 - 39 (6page)
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초록· 키워드
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Laser-induced breakdown of colloidal suspensions, such as polystyrene, ZrO₂, and SiO₂ particles in diameters of 100-400 nm in water is investigated by nanosecond flash-pumped Nd:YAG laser pulses operating at a wavelength λ = 532 ㎚. The breakdown threshold intensity is examined in terms of breakdown probability as a function of laser pulse energy. The threshold intensity for SiO₂ particles (1.27×10<SUP>11</SUP> W/㎠) with a size of 100 nm is higher than those for polystyrene and ZrO₂ particles with the same size, namely 5.7×10<SUP>10</SUP> and 5.5×10<SUP>10</SUP> W/㎠, respectively. Results indicate that the absorption of five photons is required to induce ionization of SiO₂ particles, whereas the other particles necessitate four-photon absorption. These breakdown thresholds are compared with those measured by nanosecond pulses from a diode-pumped Nd:YAG laser having a different focusing geometry.
목차
Ⅰ. INTRODUCTION
Ⅱ. EXPERIMENT
Ⅲ. RESULTS AND DISCUSSION
Ⅳ. CONCLUSION
ACKNOWLEDGEMENT
REFERENCES
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UCI(KEPA) : I410-ECN-0101-2009-425-016566830