R. Shimano

Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites (2009)

Kida, N., Takahashi, Y., Lee, J. S., Shimano, R., Yamasaki, Y., Kaneko, Y., ...

Recent spectroscopic studies at terahertz frequencies for a variety of multiferroics endowed with both ferroelectric and magnetic orders have revealed the possible emergence of a new collective...

Electric-dipole active two-magnon excitation in {\textit{ab}} spiral spin phase of a ferroelectric magnet Gd$_{\textbf{0.7}}$Tb$_{\textbf{0.3}}$MnO$_{\textbf 3}$ (2008)

Kida, N., Yamasaki, Y., Shimano, R., Arima, T., Tokura, Y.

A broad continuum-like spin excitation (1--10 meV) with a peak structure around 2.4 meV has been observed in the ferroelectric $ab$ spiral spin phase of Gd$_{0.7}$Tb$_{0.3}$MnO$_3$ by using terahertz...

Electrically driven spin excitation in a ferroelectric magnet DyMnO_3 (2007)

Kida, N., Ikebe, Y., Takahashi, Y., He, J. P., Kaneko, Y., Yamasaki, Y., ...

Temperature (5--250 K) and magnetic field (0--70 kOe) variations of the low-energy (1--10 meV) electrodynamics of spin excitations have been investigated for a complete set of light-polarization...

Study of ortho-to-paraexciton conversion in Cu$_2$O by excitonic Lyman spectroscopy (2004)

Kubouchi, M., Yoshioka, K., Shimano, R., Mysyrowicz, A., Kuwata-Gonokami, M.

Using time-resolved $1s$-$2p$ excitonic Lyman spectroscopy, we study the orthoexciton-to-paraexcitons transfer, following the creation of a high density population of ultracold $1s$ orthoexcitons by...

Photo-induced demagnetization and polaron binding energy increase observed by mid-infrared pump-probe spectroscopy in ferromagnetic Ga$_{0.94}$Mn$_{0.06}$As (2004)

Kojima, E., Heroux, J. B., Shimano, R., Hashimoto, Y., Katsumoto, S., Iye, Y., ...

Time-resolved transmittance measurements performed on Ga$_{0.94}$Mn$_{0.06}$As in the vicinity of the Mn-induced mid-infrared absorption band are presented. Upon photo-excitation, a slow increase...

Observation of the spin-charge thermal isolation of ferromagnetic Ga_{0.94}Mn_{0.06}As by time-resolved magneto-optical measurement (2002)

Kojima, E., Shimano, R., Hashimoto, Y., Katsumoto, S., Iye, Y., Kuwata-Gonokami, M.

The dynamics of magnetization under femtosecond optical excitation is studied in a ferromagnetic semiconductor Ga_{0.94}Mn_{0.06}As with a time-resolved magneto-optical Kerr effect measurement with...