Type-II behavior in wurtzite InP/InAs/InP core-multishell nanowires (2008)
Pal, B., Goto, K., Ikezawa, M., Masumoto, Y., Mohan, P., Motohisa, J., ...
We study optical transitions from a periodic array of InP/InAs/InP core-multishell nanowires (CMNs) having a wurtzite crystal structure by using photoluminescence (PL) and PL excitation (PLE)...
The sign of electron g-factor in GaAs(1-x)N(x) measured by using the Hanle effect (2008)
Kalevich, V. K., Ivchenko, E. L., Shiryaev, A. Yu., Afanasiev, M. M., Egorov, A. Yu., Ikezawa, M., ...
Positive signs of the effective g-factors for free electrons in the conduction band and electrons localized on deep paramagnetic centers have been measured in nitrogen dilute alloy...
Intraseasonal meridional current variability in the eastern equatorial Indian Ocean (2008)
Ogata, T., Sasaki, H., Murty, V.S.N., Sarma, M.S.S., Masumoto, Y.
Intraseasonal variability in meridional current in the eastern equatorial Indian Ocean is investigated by use of results from a high-resolution ocean general circulation model. Both the simulated and...
Mismo field experiment in the equatorial Indian Ocean (2008)
Masumoto, Y., Kuroda, Y., Katsumata, M., Mizuno, K., Takayabu, Y.N., Yoshizaki, M., ...
The Mirai Indian Ocean cruise for the Study of the Madden–Julian oscillation (MJO)-convection Onset (MISMO) was a field experiment that took place in the central equatorial Indian Ocean during...
Pal, B., Goto, K., Ikezawa, M., Masumoto, Y., Mohan, P., Motohisa, J., ...
Time- and spectrally-resolved PL from a periodic array of InP/InAs/InP core-multishell nanowires is presented. InAs layer shows multipeak PL spectra. PL decay is nonexponential and very slow, with...
F. Sasaki, S. Kobayashi, S. Haraichi, S. Fujiwara, K. Bando, Y. Masumoto, ...
Submitted to Adv. Mater. 2007, WILEY-VCH Verlag GmbH & Co.KGaA, Weinheim.
Spin Lifetime in Electron-Doped InP Quantum Dots (2006)
Masumoto, Y., Pal, B., Oguchi, S., Ikezawa, M.
Spin relaxation of electrons doped in InP quantum dots was studied by means of luminescence pump-probe and Hanle measurements. Optical pumping makes spins of doped electrons to be oriented in...
Nuclear spin effects in negatively charged InP quantum dots (2006)
Verbin, S. Yu., Pal, B., Ikezawa, M., Ignatiev, I. V., Masumoto, Y.
Effects of both the dynamic nuclear polarization (DNP) created by circularly polarized light and the fluctuations of average nuclear spin in a quantum dot (QD) on the electron spin orientation are...
Effect of nuclear spins on the electron spin dynamics in negatively charged InP quantum dots (2005)
Ignatiev, I. V., Verbin, S. Yu., Gerlovin, I. Ya., Maruyama, W., Pal, B., Masumoto, Y.
Kinetics of polarized photoluminescence of the negatively charged InP quantum dots in weak magnetic field is studied experimentally. Effect of both the nuclear spin fluctuations and the dynamical...
Spin-dependent recombination in GaAsN alloys (2005)
Kalevich, V. K., Ivchenko, E. L., Afanasiev, M. M., Egorov, A. Yu., Shiryaev, A. Yu., Ustinov, V. M., ...
The spin-dependent recombination (SDR) has been observed in GaAs_{1-x}N_{x} (x = 2.1, 2.7, 3.4%) at room temperature. It reveals itself in a decrease of the edge photoluminescence (PL) intensity by...
Bifurcation of the East India Coastal Current east of Sri Lanka (2005)
Vinayachandran, PN, Kagimoto, T, Masumoto, Y, Chauhan, P, Nayak, SR, Yamagata, T
The East India Coastal Current (EICC) flows equatorward during October–December carrying low salinity water from the Bay of Bengal en route. Using results from a high resolution ocean general...
Bifurcation of the East India Coastal Current east of Sri Lanka (2005)
Vinayachandran, PN, Kagimoto, T, Masumoto, Y, Chauhan, P, Nayak, SR, Yamagata, T
The East India Coastal Current (EICC) flows equatorward during October–December carrying low salinity water from the Bay of Bengal en route. Using results from a high resolution ocean general...
1.5-mu m intraband transitions in PbSe quantum dots (2003)
Okuno, T., Ikezawa, M., Masumoto, Y., Hayes, G. R., Deveaud, B., Lipovskii, A. A.
Intraband transitions around 1.5 mum are studied in PbSe quantum dots at room temperature. Femtosecond pump-probe measurements reveal induced absorption by photoexcited carriers up to higher energy...
Webster, P., Vinayachandran, P., Susanto, D., Meyers, G., Hacker, P., Masumoto, Y., ...
Understanding and predicting the interannual variations of the whole monsoon climate system has been, and will continue to be, one of the major reasons for studying the oceanography of the Indian...
Giant Optical Nonlinearity of Heterostructures with InP Self-Assembled Quantum Dots (2002)
Davydov, V., Ignat'Ev, I., Ren, H. W., Sugou, S., Masumoto, Y.
Quantum dots (QD) are an attractive object for study due to their expectable nonlinear properties. We studied nonlinear reflectlon of heterostructures with seif assembled InP QDs by use of specially...
Baranov, A. V., Yamauchi, S., Masumoto, Y., Fedorov, A. V.
Fine structure of low-energy confined exciton in CuCl spherical nanocrystals has been studied by a resonant size-selective two-photon-excited luminescence (TPL) spectroscopy with high spectral...
Observation of Internal Electric Charge in InP Self-Assembled Quantum Dots (2002)
Davydov, V., Ignat'ev, I., Rent, H. W., Sugou, S., Masumoto, Y.
Heterostructures with lnP self-assembled quantum dots were studied. Strong Franz-Keldysh oscillations were found in their nonlinear reflection spectra. These oscillations manifest the presence of...
Rent, H. W., Sugou, S., Masumoto, Y., Ignatiev, I., Kozin, I.
An intense anti-Stokes photoluminescence is observed in a structure with InP quantum dots in the presence of a direct electric current and cw optical pumping below the lowest electron hole transition...
Davydov, V., Rent, H. W., Sugou, S., Masumoto, Y.
The photo-capacitance spectroscopy at low temperature is shown to be a sensitive technique for characterization of the semiconductor structures. This technique was applied to the study of III-V...
The Effect of Deuterium on the Optical Properties of Free Standing Porous Silicon Layers (2002)
Belogorokhov, A. I., Belogorokhova, L. I., Masumoto, Y., Matsumoto, T., Zhukov, E. A.
Free-standing porous silicon films with high deuterium concentration have been fabricated. Optical properties of the freshly produced samples have been studied using infrared spectroscopy and...
The effect of deuterium on the optical properties of free-standing porous silicon layers (2000)
Matsumoto, T, Belogorokhov, A. I., Belogorokhova, L. I., Masumoto, Y, Zhukov, E. A.
We report our recent results of the effect of deuterium termination on the optical properties of porous Si nanostructures. The photoluminescence (PL) spectrum of deuterium-terminated porous Si (D-PS)...