Hidetsugu Takagi   Hideyuki Kunugita   Kazuhiro Ema   
PHYSICAL REVIEW B 87(12) 2013年3月 [査読有り]
We have experimentally compared the excitonic properties of hybrid multiple quantum wells, (C6H5-C2H4NH3)(2)PbBr4 and (C4H9NH3)(2)PbBr4, using photoluminescence, reflection, and photoluminescence excitation measurements. We focused on the contribu...
K. Wakui   Y. Eto   T. Yanagida   H. Benichi   S. Izumi   K. Ema   T. Numata   D. Fukuda   M. Sasaki   
2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2013年 [査読有り]
Ultrabroadband photon-number-resolving detection is demonstrated for parametric fluorescence ranging over 150 nm in the telecom window, using a Ti transition edge sensor. Our results violate Klyshko's classical limit for even photon numbers.
PHYSICS OF SEMICONDUCTORS 1566 107-108 2013年 [査読有り]
Optical properties of InN grown by the epitaxial lateral overgrowth (ELO) method have been studied using photoluminescence (PL) and excitation-correlation (EC) measurements. The PL spectrum is analyzed by free-electron recombination band (FERB) mo...
Hidetsugu Takagi   Mikio Sato   Yuko Takeoka   Hideyuki Kunugita   Kazuhiro Ema   
PHYSICS OF SEMICONDUCTORS 1566 435-+ 2013年 [査読有り]
We have investigated experimentally excitonic properties in organic-inorganic hybrid multi quantum well crystals, (C4H9NH3)(2)PbBr4 and (C6H5-C2H4NH3)(2)PbBr4, by measuring photoluminescence, reflectance, photoluminescence excitation spectra. In t...
Yuta Inose   Kazuhiro Ema   Masaru Sakai   Akihiko Kikuchi   Katsumi Kishino   Tomi Ohtsuki   
PHYSICS OF SEMICONDUCTORS 1566 548-+ 2013年 [査読有り]
We conducted numerical and experimental studies on Anderson localization of light in two-dimensional random systems of semiconductor columns. We investigated finite size scaling of the localization effect as a function of localization length and s...