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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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It is very important to understand the behavior of electrons, holes, phonons and spins that result from light-matter interaction to interpret fundamental physics of photoelectric device. A pump-probe study is a good approach to investigate the ultrafast dynamics of those phenomena. We developed the imaging method of pump-probe experiment with a femtosecond-scale resolution. This method enables us to achieve an additional dimension in datasets in the real space compared to using only spectroscopy. This system is also specifically advantageous to investigate the atomically thin transient metal dichalcogenides (TMD) materials such as MoS₂, ReS₂, and WSe₂. We observed excitonic ultrafast dynamics and acoustic phonon vibration in atomically thin MoS₂. Moreover, the electronic band structure near ionization energy in ReS₂ bilayer was identified by observation of the trend change in ultrafast carrier dynamics from decay-to-rise (ground state bleaching) to rise-to-decay (excited state absorption). In addition, we discovered dual resonant sum frequency generation when two pulses are simultanesouly resonant to A exciton and D exciton in monolayer WS₂ under the critical theoretical examination using real-time time-dependent DFT calculation.
목차
Abstract
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2. 본론
3. 결론
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