Overview of Research in Laboratories

Material Science Laboratory                      Keiichi Torimitsu
 The aims of the Materials Science Laboratory (MSL) are to discover novel functions of materials, produce new functions and design advanced devices based on these novel functions and materials, including biological functions and materials. Our approach to accomplishing these goals involves controlling the configuration and coupling of atoms and molecules. Bio-nano research and diamond-device research constitute our principal fields of study.
 We have three research groups whose work ranges from semiconductor devices, such as GaN devices, to organic materials, such as receptor proteins. The characteristic feature of the MSL is the effective sharing of unique materials and measurement techniques among the groups. This allows the fusion of research fields and techniques, which leads to innovative material research for the IT society.
 We established a European laboratory in the U.K. for bio-nano research in October 2004 and thus strengthened our research activities. We promote collaboration with international organizations to develop a firm foundation of basic science.

Physical Science Laboratory
                    Hiroshi Yamaguchi
 We are studying semiconductor and superconductor-based solid-state devices, which will have a revolutionary impact on communication and information technologies in the 21st century. In particular, we promote research of nanoscale devices fabricated using high-quality crystal growth and fine lithographic techniques.
 The five groups in our laboratory are working in the following areas: precise and dynamical control of single electrons, nanodevices operating with ultra low power consumption, novel nanomechanical systems utilizing mechanical degrees of freedom in solid-state architechtures, coherent quantum control of semiconductor and superconductor systems, carrier interactions in semiconductor hetero- and nanostructures, atom chips, spintronics manipulating both electron and nuclear spins. We also promote the studies of cutting-edge nanolithography techniques, high-quality crystal growth, and theoretical studies including first-principle calculations.

Optical Science Laboratory                        Yasuhiro Tokura
 This laboratory aims for the development of core-technologies that will innovate on optical communications and optical signal processing, and seeks fundamental scientific progresses.
 The groups in our laboratory are working for the quantum state control by very weak light, the search for intriguing phenomena using very intensive and short pulse light, and very small optical integrated circuits using two-dimensional photonic crystals, based on the optical properties of semiconductor nanostructures like a quantum dot.
 In this year, we realized improvements of quality of entangled photon pairs from silicon wire waveguide, magneto-optical spectroscopy of charged excitons and trions in quantum dots, and short pulse generation by adiabatic wavelength tuning in a photonic crystal high-Q cavity.


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