PHYSICS /BK21 Colloquium
관련링크
본문
"attosecond physics
연사: Goulielmakis[Max Planck Inst]
일시: 2007 년 10 월 5 일 오후 3시30분
장소: 무은재 기념관 307호 (멀티미디어 강의실)
ABSTRACT:
Macroscopic properties of matter are inextricably linked to ultrafast phenomena evolving on an atomic and molecular scale. Observation and control of the atomic motion inside molecules in real time constitutes a triumph of ultrafast science [1] and was based on developments of femtosecond laser pulses.
However the motion of electrons, which evolves typically on a scale ranging from a few tens attoseconds (1 as =10-18 s) to a few tens femtoseconds (1 fs = 10-15 s), has hitherto remained inaccessible.
I present developments of tools that allow tracking and controlling of electron dynamics on an attosecond time scale. They comprise a combination of attosecond soft x-ray pulses [2] and precisely sub-cycle controlled light fields [3], [4]. This combination provides the highest temporal resolution available to date which is ~100 attoseconds (1 atomic unit of time ~ 24 attoseconds).
These tools will offer the potential to interrogate the electronic properties of a broad range of microscopic systems [4] for the first time. These include inner-shell ultrafast electron dynamics, electron transfer in chemical processes as well as the possibility to identify the ultimate frontiers of electronics given the day-to-day reduction of their size approaching the “few atoms per logic gate” limit.
문의처: 김동언(054-279-2089, kimd@postech.ac.kr)
"
연사: Goulielmakis[Max Planck Inst]
일시: 2007 년 10 월 5 일 오후 3시30분
장소: 무은재 기념관 307호 (멀티미디어 강의실)
ABSTRACT:
Macroscopic properties of matter are inextricably linked to ultrafast phenomena evolving on an atomic and molecular scale. Observation and control of the atomic motion inside molecules in real time constitutes a triumph of ultrafast science [1] and was based on developments of femtosecond laser pulses.
However the motion of electrons, which evolves typically on a scale ranging from a few tens attoseconds (1 as =10-18 s) to a few tens femtoseconds (1 fs = 10-15 s), has hitherto remained inaccessible.
I present developments of tools that allow tracking and controlling of electron dynamics on an attosecond time scale. They comprise a combination of attosecond soft x-ray pulses [2] and precisely sub-cycle controlled light fields [3], [4]. This combination provides the highest temporal resolution available to date which is ~100 attoseconds (1 atomic unit of time ~ 24 attoseconds).
These tools will offer the potential to interrogate the electronic properties of a broad range of microscopic systems [4] for the first time. These include inner-shell ultrafast electron dynamics, electron transfer in chemical processes as well as the possibility to identify the ultimate frontiers of electronics given the day-to-day reduction of their size approaching the “few atoms per logic gate” limit.
문의처: 김동언(054-279-2089, kimd@postech.ac.kr)
"
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