Members

Assistant Professor

Keshav Dani
kmdani ('at' oist.jp)
 

I joined OIST as an Asst. Professor in Nov. 2011 after completing a Director’s Postdoctoral Fellowship at the Center for Integrated Nanotechnologies at Los Alamos National Laboratory. I graduated from UC Berkeley in 2006 with a PhD in Physics under the supervision of Prof. Daniel Chemla. I obtained a BS from Caltech in Mathematics with a senior thesis in Quantum Information Theory under John Preskill and Hideo Mabuchi. My recent research interests have been in ultrafast metamaterial devices, femtosecond dynamics in graphene and in developing pump-probe techniques from visible to THz.

Keshav Dani

 

Visiting Faculty

Chris Weber
[July 2015 - ]
 

I am an Associate Professor of Physics at Santa Clara University, in California. My research interests have included dilute magnetic semiconductors and three-dimensional Dirac semimetals. I use transient-grating spectroscopy to measure the diffusion coefficient and complex optical response of photoexcited electrons and holes. While visiting the Dani Unit, I am studying two-dimensional materials.

 

Postdoctoral Researchers

Michael Man
michael.man (‘at’ oist.jp)
 

I received both my master and PhD degrees from the Hong Kong University of Science and Technology (HKUST). My main research interest is in the growth and characterization of nanostructures/ultrafilm films using a powerful and versatile technique called low energy electron microscopy and photoemission electron microscopy (LEEM/PEEM). LEEM/PEEM is capable of performing time and spatially resolved structural, electronic and chemical state measurements at spatial resolution down to the nanometer range. With this instrument, for example, we can study the correlation between morphology and band structure in inhomogeneous nanostructures such as in few layer graphene; we can also examine the surface magnetic state and image the dynamics in magnetic domain structure in variety of magnetic nanomaterials. I joined Prof. Dani’s group in OIST in December 2012. Together, we seek to combine my experience in LEEM/PEEM microscopy with the group’s expertise in ultrafast spectroscopy techniques. One of our goals is in the investigation and visualization of the ultrafast dynamics in nanostructures.

 

Michael Man

Bala Murali Krishna Mariserla
bala.mariserla ('at' oist.jp)
 

I am from southern part of India. I joined the Femtosecond spectroscopy unit on 13th may 2013. I have nonlinear optics background and my interests include time domain spectroscopy of optical pump-probe and THz. Before joining the group, I worked at Laser lab, University of Hyderabad for my Ph. D program. I received my masters in physics from Andhra University, Visakhapatnam.
At University of Hyderabad, my thesis involved nonlinear optical characterization of Graphene based hybrid materials, biosynthesized silver nanoparticles and organic molecules using nano, pico and femtosecond laser systems for optical limiting application. Good at degenerate four wave mixing, auto-correlation, Z-Scan and pump-probe techniques.

 

Julien Madeo
julien.madeo('at' oist.jp)
 

I did my PhD in Laboratoire Pierre Aigrain at Ecole Normale Supérieure in Paris. My work involved, on one hand, the investigation of electronic and optical properties of terahertz sources, Quantum Cascade Lasers (QCL), using THz Time-Domain Spectroscopy (THz TDS). On the other hand, I studied nonlinear optical properties of QCL to perform efficient 3-wave mixing in order to convert a THz radiation onto an NIR optical carrier. In 2012, I did a short postdoctoral visit in Dani Unit to build a broadband THz TDS setup (> 10 THz). Then, I worked 2 years as a postdoctoral researcher in Laboratoire Matériaux et Phénomènes Quantiques at Université Paris 7, where I investigated the properties of novel semiconductor based heterostructures for THz generation and plasmonics. I am very excited to be back at OIST for a longer period. My projects at OIST (in collaboration with MPQ-Paris 7, the University of Leeds and the University of Montpellier) deal with the realization of new THz quantum devices, the control of the losses and near field interaction and investigation of the laser gain using THz-TDS in arrays of microresonators.

 

Taka Harada
takaaki.harada('at' oist.jp)
 

I have taken BSc (Honours) and PhD in Chemistry at the University of Adelaide in Australia, which involved unltrafast spectroscopy (femtosecond transient absorption spectroscopy and time-resolved fluorescence upconversion spectroscopy). In 2013, I joined the Femtosecond Spectroscopy Unit at OIST as a special research student. My keen interest in optical-pump terahertz-probe spectroscopic characterization led to re-join in this unit in April 2015. I am glad to take cutting-edge research and challenging projects in this unit and OIST. It is my hope to further work on optical-pump terahertz-probe spectroscopy, conduct characterizations of novel materials, and extend my scientific skills in ultrafast spectroscopy.

 

 

PhD Students

E Laine Wong
elaine.wong ('at' oist.jp)
 

I joined Dani Unit for my PhD study in Jan 2014 after completing my brief rotations in various fields of optical microscopy, gene transformation, terahertz time-domain spectroscopy and cold atoms. I graduated from National University of Singapore with a bachelor degree in Engineering and went on to work as a research assistant in the optoelectronics lab in the university. My PhD study will focus on nonlinear optical properties of condensed matter. I look forward to employ the various experimental tools such as pump-probe and high harmonic generation to acquire better understanding of the femtosecond dynamics in matter.

Athanasios Margiolakis
athanasios ('at' oist.jp)
 

I completed my BSc (Physics), MSc (Photonics and Microelectronics) at the University of Crete and I worked as a technical student at CERN (LHC - Beam Position Monitoring system). I am currently enrolled in the postgraduate program at the University of Crete under Prof. G. Tsironis and I have been working as a special research student at OIST in Femtosecond Spectroscopy Unit since October 2013. My work is placed both in the Microscopy and High energy Labs and it covers femtosecond spectroscopy techniques and fabrication processes. I am honored to be here and I am motivated by my colleagues and the work environment.
 

Viktoras Lisicovas

viktoras.lisicovas ('at' oist.jp)

I graduated from Jacobs University in Bremen, Germany with a degree in Biochemistry and Cell Biology. Later, I have worked in the Laboratory of Biophysics and Applied Pharmacology at ENS Cachan. At OIST my interest lies in studying the basic mechanisms of memory in small networks. I joined Femtosecond Microscopy Unit to pursue improvements in optical imaging techniques for basic neuroscience applications.

 

Research Interns

Bryan Berggren
[July 2015 - ]
 

I am a 3rd undergraduate studying at Santa Clara University and majoring in Physics. For about a year and a half, I have been working for Dr. Chris Weber using transient grating pump probe experiments to find diffusion coefficients and optical response of various materials, focusing on three-dimensional Dirac semimetals and other semiconductors with little previous ultrafast research done on them. I am very excited to work at OIST for two months, and while here, I'm researching two-dimensional materials.

 

 

Current OIST Rotation Students

 

Research Administrator

Yumi Ito
yumi.ito('at'oist.jp)
 

I began my career at Texas State University in September 2004 as a part-time editorial assistant and joined the staff full-time for Dani Unit as an administrative assistant in April 2015. My key element for the unit is caring and warmth in assisting them in achieving their objectives from administrative side, and in helping them have a laugh and fun. Favoring trip and movies, I enjoy spending time with family and friends. An oni-wife and a mother of a King-Kong baby boy.

 

Previous Group Members

Previous Rotation Students 

 

Page last updated on August 18 2015 (TH).