8/30 POSTECH-APCTP Distinguished Lecture
관련링크
본문
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-제 목 : Steering and Tracking Electrons on the Atomic Scale: Lightwave Electronics
-연 사 : Prof. Ferenc Krausz
(Max-Planck-Institut für Quantenoptik, Garching,
Ludwig-Maximilians-Universität München, Germany)
-일 시 : 2007년 8월 30일(목), 오전 11시
-장 소 : APCTP 세미나실(무은재기념관 5층 512호)
-주 최 : 포스텍 이론물리연구소(PCTP), 아태이론물리센터(APCTP)
Fundamental processes in atoms, molecules, as well as condensed matter are triggered or mediated by the motion of electrons inside or between atoms. Electronic dynamics on atomic length scales tends to unfold within tens to thousands of attoseconds (1 attosecond [as] = 10-18 s). Recent breakthroughs in laser science are now opening the door to watching and controlling these hitherto inaccessible microscopic dynamics.
The key to accessing the attosecond time domain is the control of the electric field of (visible) light, which varies its strength and direction within less than a femtosecond (1 femtosecond = 1000 attoseconds). Atoms exposed to a few oscillations cycles of intense laser light are able to emit a single extreme ultraviolet (xuv) burst lasting less than one femtosecond [1,2]. Full control of the evolution of the electromagnetic field in laser pulses comprising a few wave cycles [3] have recently allowed the reproducible generation and measurement of isolated sub-femtosecond xuv pulses [4], demonstrating the control of microscopic processes (electron motion and photon emission) on an attosecond time scale. These tools have enabled us to observe the oscillating electric field of visible light [5]and intra-atomic electron motion [6,7] in real time. Recent experiments have demonstrated the feasibility of controlling electronic motion on molecular orbitals [8] and direct time-domain measurement of attosecond electronic charge transport in condensed matter [9]. The emerging technical capability of controlling and measuring atomic-scale electron motion and related charge transport opens to door to develop lightwave electronics [10], the ultimate electron-based technology for information science.
[1] M. Hentschel et al., Nature 414, 509 (2001); [2] R. Kienberger et al., Science 291, 1923 (2002); [3] A. Baltuska et al., Nature 421, 611 (2003); [4] R. Kienberger et al., Nature 427, 817 (2004); [5] E. Goulielmakis et al., Science 305, 1267 (2004); [6] M. Drescher et al., Nature 419, 803 (2002). [7] M. Uiberacker et al., Nature 446, 627 (2007). [8] M. Kling et al., Science 312, 246 (2006) [9] A. Cavalieri et al., to be published; [10] E. Goulielmakis et al, Science 317, 769(2007)."
-제 목 : Steering and Tracking Electrons on the Atomic Scale: Lightwave Electronics
-연 사 : Prof. Ferenc Krausz
(Max-Planck-Institut für Quantenoptik, Garching,
Ludwig-Maximilians-Universität München, Germany)
-일 시 : 2007년 8월 30일(목), 오전 11시
-장 소 : APCTP 세미나실(무은재기념관 5층 512호)
-주 최 : 포스텍 이론물리연구소(PCTP), 아태이론물리센터(APCTP)
Fundamental processes in atoms, molecules, as well as condensed matter are triggered or mediated by the motion of electrons inside or between atoms. Electronic dynamics on atomic length scales tends to unfold within tens to thousands of attoseconds (1 attosecond [as] = 10-18 s). Recent breakthroughs in laser science are now opening the door to watching and controlling these hitherto inaccessible microscopic dynamics.
The key to accessing the attosecond time domain is the control of the electric field of (visible) light, which varies its strength and direction within less than a femtosecond (1 femtosecond = 1000 attoseconds). Atoms exposed to a few oscillations cycles of intense laser light are able to emit a single extreme ultraviolet (xuv) burst lasting less than one femtosecond [1,2]. Full control of the evolution of the electromagnetic field in laser pulses comprising a few wave cycles [3] have recently allowed the reproducible generation and measurement of isolated sub-femtosecond xuv pulses [4], demonstrating the control of microscopic processes (electron motion and photon emission) on an attosecond time scale. These tools have enabled us to observe the oscillating electric field of visible light [5]and intra-atomic electron motion [6,7] in real time. Recent experiments have demonstrated the feasibility of controlling electronic motion on molecular orbitals [8] and direct time-domain measurement of attosecond electronic charge transport in condensed matter [9]. The emerging technical capability of controlling and measuring atomic-scale electron motion and related charge transport opens to door to develop lightwave electronics [10], the ultimate electron-based technology for information science.
[1] M. Hentschel et al., Nature 414, 509 (2001); [2] R. Kienberger et al., Science 291, 1923 (2002); [3] A. Baltuska et al., Nature 421, 611 (2003); [4] R. Kienberger et al., Nature 427, 817 (2004); [5] E. Goulielmakis et al., Science 305, 1267 (2004); [6] M. Drescher et al., Nature 419, 803 (2002). [7] M. Uiberacker et al., Nature 446, 627 (2007). [8] M. Kling et al., Science 312, 246 (2006) [9] A. Cavalieri et al., to be published; [10] E. Goulielmakis et al, Science 317, 769(2007)."
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