Hiroyuki Mitsu
Fuji Xerox
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Publication
Featured researches published by Hiroyuki Mitsu.
Applied Physics Letters | 2004
Satoshi Tatsuura; Minquan Tian; Makoto Furuki; Yasuhiro Sato; Izumi Iwasa; Hiroyuki Mitsu
An organic film formed of newly synthesized dye aggregates with an absorption peak in telecommunication wavelength range exhibited large third-order nonlinear optical susceptibility χ(3) and fast recovery of bleached absorption. A derivative with a di(benzofuranonyl)methanolate structure forms stable aggregates in a spin-coated film and shows an absorption maximum at 1.24 μm. An imaginary part χI(3) of the film assumes a maximum at 1.30 μm, which is −0.83×10−7 esu. The time evolution of differential transmission spectra indicates that the time constant of the recovery of bleached absorption is 80–240 fs for a fast component and 2.2–6.5 ps for a slow one. This organic film has considerable advantages for future planar optical devices.
Applied Physics Letters | 2004
Satoshi Tatsuura; Takashi Matsubara; Minquan Tian; Hiroyuki Mitsu; Izumi Iwasa; Yasuhiro Sato; Makoto Furuki
We report ultrafast all-optical switching at optical communication wavelength using a device with a layered structure containing organic films. Spin-coated layers of di(benzofuranonyl)methanolate (BM) derivative are formed alternately with vacuum evaporated layers of germanium (II) oxide. An optical Kerr shutter is constructed using this BM multilayer with 1.55μm signal and 1.63μm gate pulses of 100fs time durations. As a result, optical switching with signal-to-noise ratio over 20dB is attained at gate-pulse intensity above 30pJ∕μm2 and a response time comparable to pulse width is observed. The BM multilayer could be an efficient optical communication device for parallel data processing.
Applied Physics Letters | 2005
Satoshi Tatsuura; Takashi Matsubara; Hiroyuki Mitsu; Yasuhiro Sato; Izumi Iwasa; Minquan Tian; Makoto Furuki
A semiconductor bulk crystal has several advantages as a nonlinear optical material, such as low processing cost, long interaction length, and alleviation of the free-carrier absorption caused by two-photon absorption (TPA). We examine optical properties of semiconductor bulk crystals with different orientations at 1.55μm and find that CdTe[111] has favorable capabilities, such as nonlinear refractive index of 5.23×10−17(m2W), TPA coefficient of 18.3(mmGW), and consequent figure of merit of 0.54. Optical three-dimensional measurements of reflective material are carried out using CdTe[111] as ultrafast optical Kerr shutter and clear images corresponding to surface steps are obtained.
Optics Letters | 2004
Makoto Naruse; Hiroyuki Mitsu; Makoto Furuki; Izumi Iwasa; Yasuhiro Sato; Satoshi Tatsuura; Minquan Tian; Fumito Kubota
Terabit all-optical complementary logic is proposed using two successive time slots to represent a unique logical status. An organic molecular thin film is used as an array of optically controlled optical switches. By utilizing the planar structure of the film and its ultrafast optical response, proof-of-principle fully optical NOT and AND logic operations were demonstrated with 400-fs interval pulses.
Applied Physics Letters | 2003
Makoto Naruse; Hiroyuki Mitsu; Makoto Furuki; Izumi Iwasa; Yasuhiro Sato; Satoshi Tatsuura; Minquan Tian
We show a femtosecond timing measurement and control technique using a squarylium dye J-aggregate film, which is an organic thin film that acts as an ultrafast two-dimensional optical switch. Optical pulse timing is directly mapped to space-domain position on the film, and the large area and ultrafast response offer a femtosecond-resolved, large dynamic range, real-time, multichannel timing measurement capability. A timing fluctuation (jitter, wander, and skew) reduction architecture is presented and experimentally demonstrated.
quantum electronics and laser science conference | 2005
Makoto Naruse; Fumito Kubota; Hiroyuki Mitsu; Makoto Furuki; Izumi Iwasa; Satoshi Tatsuura; Yasuhiro Sato; Minquan Tian; Takashi Matsubara
All-optical pulse timing fluctuation reduction is successfully demonstrated using a film of organic molecular material, di(benzofuranonyl)methanolate, which is operated at 1.55 mum in an architecture using two-dimensional transmission gating
Advanced Materials | 2003
S. Tatsuura; Makoto Furuki; Yasuhiro Sato; Izumi Iwasa; Minquan Tian; Hiroyuki Mitsu
Archive | 2005
Yasuhiro Sato; Makoto Furuki; Izumi Iwasa; Satoshi Tatsuura; Minquan Tian; Hiroyuki Mitsu; Takashi Matsubara
Archive | 2003
Makoto Furuki; Yasuhiro Sato; Izumi Iwasa; Minquan Tian; Satoshi Tatsuura; Hiroyuki Mitsu
Archive | 2008
Masaki Suto; Hiroyuki Mitsu; Koji Miyake
Collaboration
Dive into the Hiroyuki Mitsu's collaboration.
National Institute of Information and Communications Technology
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