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Organization / Research

Yasaka Laboratory


photo Hiroshi YASAKA, Professor
Masato Yoshida,Associate Professor
Nobuhide Yokota,Assistant Professor

We are investigating novel, highly functional semiconductor photonic devices, which is indispensable to realize new generation information communication networks. We are also investigating novel, compact and widely tunable coherent light sources based on lasers and nonlinear-optical phenomena.

We have been researching highly functional semiconductor photonic devices and semiconductor photonic integrated circuits based on semiconductor lasers and semiconductor optical modulators to create novel semiconductor photonic devices, which can control intensity, phase, frequency and polarization of optical signal freely.

We have also been studying utra-broadband coherent terahertz (THz) wave radiation to explore novel science and technology fields, the band of which extends from ultra-violet to far-infrared region. Widely tunable, spatially and temporally coherent THz wave is generated for the first time, by using optical parametric effects. THz-frequency coherent anti-Stokes Raman (THz-CARS) microscope has been successfully applied for sensitive detection of THz resonances in biomolecules. Novel THz biosensors have been developed by using local-field enhancement via surface plasmon resonance, and successfully applied to near-field THz imaging with sub-wavelength resolution.

Furthermore, our research interests cover ultrafast photonic devices, opto-electronic semiconductor devices and their applications to optical computing and signal processing areas.

Research topics:

  1. Highly functional semiconductor photonic devices
  2. New function semiconductor photonic integration circuits
  3. Ultra Broadband, coherent tunable light sources using nonlinear optics
  4. Terahertz biophotonics
Group of Electrical Engineering, Communication Engineering,
Electronic Engineering, and Information Engineering, Tohoku University
6-6-05, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
TEL : 022-795-7186 (Japanese Only)
Email :