Material Science Laboratory |
Hiroki Hibino |
This laboratory aims at contributing to progress in materials
science and revolutionizing information communication technology by creating
new materials and functions through materials design at the atomic and
molecular levels.
This laboratory consists of three research groups investigating
a wide range of materials such as nitride semiconductors, graphene, superconductors,
and biological molecules. We are conducting innovative materials research
based on the technologies of growing high-quality thin films and precisely
measuring the structure and physical properties of materials.
This year, we succeeded in measuring extremely narrow violet photoluminescence line from ultrathin InN single quantum well on step-free GaN surface, demonstrating label-free protein detection on graphene oxide surface, and achieving electrocardiography simply by wearing a piece of clothing that has textile electrodes combined with conductive polymer. |
Physical Science Laboratory |
Akira Fujiwara |
The aim of this laboratory is to develop semiconductor-
and superconductor-based solid-state devices, which will have a revolutionary
impact on future communication and information technologies. Utilizing
high-quality crystal growth techniques and nanolithography techniques we
have developed, five research groups are working on nanodevices, quantum
information processing devices, and high-sensitivity sensors based on new
degrees of freedom such as single electrons, mechanical oscillations, quantum
coherent states, and spins.
This year we succeeded in measuring and controlling the
velocity of plasmons in graphene and realizing "cavity-electromechanics"
with a nanomechanical resonator, which is a classical analogy of cavity
quantum electrodynamics. We also demonstrated the operations of novel devices
such as a logic device with an electromechanical membrane resonator and
a sensor based on stochastic resonance with silicon nanotransistors. |
Optical Science Laboratory |
Tetsuomi Sogawa |
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 control of optical properties
by using photonic crystals and ultrasonic techniques, based on unique properties
of semiconductor nanostructures such as quantum dots and nanowires.
In this year, we demonstrated a Bose-Einstein condensate
of cold atoms on the superconducting atom chip. We succeeded in generating
a polarization entangled photon pair with a high quality by use of an integrated
silicon photonic circuit. We also demonstrated that electron spins in semiconductors
can be transported and manipulated by using surface acoustic waves and
that electron spin resonance can be achieved in the absence of real magnetic
fields. |
Nanophotonics Center |
Masaya Notomi |
Nanophotonics Center (NPC) was just established in April
2012 by several research groups involved with nanophotonics in NTT Basic
Research Laboratories, NTT Photonics Laboratories, and NTT Microsystem
Integration Laboratories. We are aiming for developing a full-fledged large-scale
photonic integration technology by which we will be able to densely integrate
a large number of nano-scale photonic devices with various functions in
a single chip. Furthermore, we are targeting extreme reduction of the consumption
energy for photonic information processing by taking advantage of the nanophotonics
technology.
Currently, we are conducting studies of photonic crystals
to reduce the footprint and consumption energy of various photonic devices,
such as all-optical switches, all-optical memories, and lasers. We are
also studying various photonic nanostructures to ultimately enhance light-matter
interactions, and exploiting photonic integrated circuits and devices based
on the silicon photonic platform. Furthermore, we are developing ultra-fine
nanofabrication technologies based on electron beam lithography and sophisticated
integration technologies of active semiconductors for photonics. |