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IBS Institute for Basic Science

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Quantum spectroscopy with undetected photons FQMT17 We present our experimental progress for the first demonstration of high-resolution quantum spectroscopy experiment consisting of two type-0 SPDC (spontaneously pumped down converter) crystals pumped by a phase-locked optical frequency comb. Our quantum spectroscopy setup resembles that of the same quantum Mach-Zehnder interferometer of Zeilinge... RegDate 2019-10-30 Hit 1974
Super-resolved Expansion Microscopy 7th Jilin-Korea-Waseda Alliance Annual Symposium Super-resolution fluorescence microscopy overcomes the resolution limit by means of optics and spectroscopy. On the other hand, expansion microscopy uses physically expanded sample linked to swellable polymer matrix. The enlarged sample allows for overcoming the resolution limit under conventional fluorescen... RegDate 2019-10-29 Hit 2087
Reaction Mechanism study of Cyanide Catalyzed Synthesis of Benzoxazole using Reaction IR Spectroscopy 124th Summer Symposium of KCS-Physical Chemistry DivisionBenzofused heteroaromatic compounds are used as building blocks for therapeutically active compounds, natural products, and functional materials. Prof. Cheon’s group in Korea University successfully developed the methods for the synthesis of benzofused heteroaromatic compound using cyanide cata... RegDate 2019-10-29 Hit 1896
Label-free Coherent Vibrational Imaging by Stimulated Raman Scattering Microscopy 124th Summer Symposium of KCS-Physical Chemistry Division We recently have developed a label-free coherent vibrational imaging technique, stimulated Raman scattering (SRS) microscopy, which obtains chemical-specific information of samples as the label-free imaging manner. The imaging contrast of the SRS microscopy originates from molecular vibrational ... RegDate 2019-10-29 Hit 2030
Photo-oxidation and Rebinding Kinetics of Bilirubin-bound UnaG for Super-resolution Imaging 124th Summer Symposium of KCS-Physical Chemistry Division Single-molecule localization method is commonly used to construct a super-resolution image or to track a molecule of interest. The fitting accuracy of PSF to the image of fluorescence emission from a single molecule, which is the most frequently used method to find a molecule’s position, highl... RegDate 2019-10-29 Hit 2008
Nonlinear effects contribution in Stimulated Raman Loss measurement with intensive Raman pump intensity 124th Summer Symposium of KCS-Physical Chemistry Division Unlike spontaneous Raman effect, stimulated Raman scattering (SRS) generates fields allowing Raman signals from individual scatterers to add up into a highly directional, high-brightness coherent beam. However, in our experiment, we have performed a stimulated Raman loss (SRL) spectroscopy experimen... RegDate 2019-10-29 Hit 2158
The Ultrafast dynamics of intraband excitons in HgS CQD’s 124th Summer Symposium of KCS-Physical Chemistry Division The HgS Collidal Quantum Dots(CQDs) with Mid-IR intraband gap can be fascinating materials for IR photodevices and laser1. Here, we reported the interesting exciton relaxation dynamics of Dodecanethiol-doped HgS CQD’s observed with femtosecond IR pump-probe experiments. With the variation of p... RegDate 2019-10-29 Hit 2030
A Raman Spectroscopic Approach to Photo-Degradation Process of PTB7-Th Polymer 124th Summer Symposium of KCS-Physical Chemistry Division Organic photovoltaics composed of conducting copolymer and fullerenes have many advantages compare to silicon based solar cell such as low-cost, light-weight, solubility, flexibility etc. Moreover, with consistent efforts, power conversion efficiency of OPVs comes up to 12%, OPV shows promising ... RegDate 2019-10-29 Hit 2336
Live-cell Imaging with Interferometric Scattering Microscopy (iSCAT) 124th Summer Symposium of KCS-Physical Chemistry Division Optical detection of single living-cell has been studied using fluorescent labeling as the basis of single-molecule sensitivity. Despite the many advantage of using fluorescence, the intensity and duration impose fundamental limits on the imaging speed and precision for real-time tracking studie... RegDate 2019-10-29 Hit 1819
sHaRPer: algorithm that acquires kinetic information from slow transitions in smFRET measurements 2017 KPS Spring Meeting Single-molecule FRET is one of the most powerful and widely used biophysical techniques in biological sciences. It, however, has certain limitations such as weak signal and limited measurement time intrinsic to single-molecule fluorescence measurements. Despite several ameliorative measures taken to increase measurement time, it... RegDate 2019-10-29 Hit 1999
Vibrational Solvatochromism Studies of AmideⅠmode of N-Methylacetamide 2017 119th KCS Meeting Vibrational solvatochromism is the process of the changes in the vibrational absorption spectrum due to molecular surrounding changes. To study the environment of a molecule, we often use properly chosen chromophores. I will discuss carbonyl IR probe among chromophores. The first consideration in carbonyl IR probe is AmideⅠmod... RegDate 2019-10-29 Hit 2116
The electronic dynamics of conduction band of OLA-HgS Quantum dot 2017 119th KCS Meeting The colloidal quantum dots(CQDs) can be utilized in laser source, LEDs, quantum computation and many more. Especially, the intraband transition of CQDs is in the spotlight because it allows reaching mid-IR regime and it can be used for MIR laser sources or photoedetector. Unfortunately, its application is limited by too fast dec... RegDate 2019-10-29 Hit 2014

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