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Nomura Lab
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A lab that probes and manipulates electrons in nanostructures using light.
AboutAbout the lab
Exploring new material properties and devices with advanced optics and nanostructures
The Optical Nanophysics Lab (Nomura Lab) uses advanced optical methods to study new physical properties and nanodevices based on structures on the scale of nanometers.
The lab controls light with laser technology and nano-optics, sends that light into the electron system inside a nanostructure, and manipulates the electronic states.
Conversely, it can also learn the properties of the electron system by examining the light that comes out of it.
This research is expected to lead to applications that require ultra-low power consumption, such as optical sensors, optical switches, light-emitting devices, and quantum computers.
Key terms
- Quantum Hall effect
- One of the quantum effects that can in principle make the flow of electrons unidirectional. It is robust against defects and impurities.
- Transition metal dichalcogenide
- A layered material in which each transition metal atom (Mo, W, Nb, etc.) is bonded to two chalcogen atoms such as S, Se, or Te.
- Diamond NV center
- A structure in diamond in which a nitrogen atom sits next to a vacancy (a missing atom). It emits red light when excited by green laser light.
ResearchResearch themes
The lab controls light with laser technology and nano-optics to manipulate the state of electron systems inside nanometer-scale structures, and also examines their properties through the light they emit. While exploring the physics of phenomena governed by quantum mechanics, the research is also expected to lead to applications that require ultra-low power consumption. The description on the research introduction page dates from around 2021.
*Illustrative imageQuantum-effect devices that make electrons flow in one direction
Using quantum effects such as the quantum Hall effect, the flow of electrons can in principle be made unidirectional, eliminating backward-moving electrons that cause heat generation. Devices using this effect are expected to reduce power consumption.
*Illustrative imageTransistors using atomic-layer materials
Unlike graphene, transition metal dichalcogenides are layered materials that have a band gap and can be made into optical devices and transistors. The lab sandwiched MoS2 between h-BN layers and made a transistor that is less susceptible to environmental disturbances and has a large optical response.
*Illustrative imageFreely shaping optical pulses
This is a method that splits an optical pulse by frequency, programs the phase and amplitude of each component, and synthesizes an arbitrary waveform. With vector pulse shaping, which independently controls two orthogonal polarizations, the time variation of the light's electric field and its polarization state can be freely manipulated.
*Illustrative imageQuantum sensing with diamond
Ultra-sensitive measurement using quantum coherence is called quantum sensing. The lab developed a magnetic microscope using diamond NV centers and, by frequency-modulating the microwaves, obtained higher magnetic field sensitivity than with continuous-wave microwaves.
MembersFaculty
- Associate ProfessorShintaro Nomura
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Lasertests” The Air Force Research Laboratory’s Directed Energy Directorate / Public domain (cropped)
- Quantum-effect devices that make electrons flow in one direction: “CW-01 National Semiconductor Scientific Calculator Watch CMOS-LSI circuit dies” Mister rf / CC BY-SA 4.0 (cropped)
- Transistors using atomic-layer materials: “1T stacking layer” Fador789 / CC BY-SA 4.0 (cropped)
- Freely shaping optical pulses: “Laser Optics - Idaho National Laboratory” Idaho National Laboratory / CC BY 2.0 (cropped)
- Quantum sensing with diamond: “Fancy Yellow Diamond created by Syntechno LTD” Igor Stratichuk / CC BY-SA 4.0 (cropped)
- Related lab (ナノフォトニクス
（舛本・ 池沢研究室） ): “Laser Diode Module” Robert Howie from Perth, Australia / CC BY-SA 2.0 (cropped) - Related lab (ナノフォトニクス
（久保研究室） ): “COVID-19- DOE Response Researchers with UEM microscope ( )” U.S. Department of Energy from United States / Public domain (cropped) - Related lab (量子物性理論
（初貝・溝口・曽根研究室） ): “Crystal lattice with hugin sky background” Engelbert Niehaus / CC BY 4.0 (cropped) - Related lab (ナノ構造物性研究室): “Fullerene-C70-3D-sticks” Jynto (talk) / CC0 (cropped)
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