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Toma Lab
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A lab that uses the optical properties of nanostructures to create new optical elements and biosensors.
AboutAbout the lab
Toward new research that merges light, nanotechnology, and information.
The Toma Lab studies how to control light with structures at the nanometer scale in order to create new optical elements and biosensing technologies.
The lab combines methods from computational science, nanofabrication, materials exploration, device design, and informatics.
It aims to make it possible to perform biosensor measurements, which until now could only be done with dedicated instruments, on familiar devices such as smartphones.
Key terms
- Metasurface
- A surface on which structures smaller than the wavelength of light are arranged so that the way light travels and its color can be changed artificially.
- Surface plasmon resonance
- A phenomenon in which free electrons in a metal oscillate together with light. It strongly absorbs light of specific wavelengths.
- Self-assembly
- The property by which particles or molecules arrange themselves in an ordered pattern naturally, without being placed one by one from outside.
NewsLab news
A new paper was published in Biosensors and Bioelectronics
Graduate admissions information session for the Electrical and Electronic Engineering Program (lab tours held at the same time)
A collaborative paper was published in Optics Letters
A collaborative paper was published in Chemical Science
A new paper was published in Analytica Chimica Acta
ResearchResearch themes
Building on technology for manipulating light at nanoscale interfaces, the lab creates new optical elements and biosensing technologies using metasurfaces and nanostructures with special optical properties. It aims to realize smart sensing technologies for monitoring health and the environment, as well as new optical information devices.
*Illustrative imageColors produced by metal microstructures
Metal surfaces with structures smaller than the wavelength of light show colors that differ from ordinary metallic luster. Toward developing sensor substrates, the lab focuses on light absorption caused by this surface plasmon resonance.
*Illustrative imageFabricating nanostructures over large areas
Arrays of metal nanostructures, which normally require large-scale equipment, are fabricated over large areas with various optical properties by using the self-assembly of dielectric nanoparticles.
*Illustrative imageBiosensors read with a smartphone
The lab develops biosensor technology that uses the surface of color-producing metal nanostructures to detect biomolecules related to disease and health conditions with mobile devices such as smartphones.
MembersFaculty
The members of the Toma Lab consist of faculty and master's and undergraduate students.As of 2026
- Associate ProfessorMana TomaPublications ↗
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: “Au nanoparticles” Nikonianman / CC BY-SA 4.0 (cropped)
- Colors produced by metal microstructures: “Gold 8125c” George Lisensky / CC BY-SA 4.0 (cropped)
- Fabricating nanostructures over large areas: “Nanoparticle coating” Jyrkorpela / CC BY-SA 4.0 (cropped)
- Biosensors read with a smartphone: “LFT lateral flow test (positive)” Iantresman / CC BY-SA 4.0 (cropped)
- Related lab (Tokuda Lab): “Close-up of a polycrystalline solar PV panel” Guilhem Vellut / CC BY 2.0 (cropped)
- Related lab (Okino Lab): “Buse plasma à pression atmosphérique” Acxys / CC BY-SA 3.0 (cropped)
- Related lab (Nakamura Lab): “Ultrasonic motor” Yorkshire Terrier / Public domain (cropped)
- Related lab (Akatsuka Lab): “Gerds plasma” Gerd domrath at German Wikipedia / Public domain (cropped)
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