Browsing by Issue Date, starting with "2009-05-24"
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Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, Item type:Item, 戰場上的婆娑羅(2009-05-24) ;洪效凡 ;Department of Communication and Technology傳播與科技學系戰國BASARA為一款知名系列遊戲,遊戲甫在05年推出時,因性質與無雙系列相似而受到注目,但其內容與無雙的殺砍敵人外更多了惡搞成分,除了將日本的戰國人物賦予了明顯個性,更自創了許多故事背景,在史實與偽現代的交織下舞出另電玩迷享受的華麗戰場。Item type:Item, Intramolecular Donor-Acceptor Regioregular Poly(hexylphenanthrenyl-imidazole thiophene) Exhibits Enhanced Hole Mobility for Heterojunction Solar Cell Applications(2009-05-25) ;Chang, Yao-Te ;Hsu, So-Lin ;Su, Ming-Hsin ;Wei, Kung-Hwa材料科學與工程學系PHPIT, a new kind of intramolecular donor-acceptor side-chain-tethered hexyl-phenanthrenyl-imidazole polythiophene, is synthesized. The more balanced electron and hole mobilities and the enhanced visible- and internal-light absorptions in the devices consisting of annealed PHPIT/PCBM blends both contribute to a much higher short-circuit current density, which in turn led to a power conversion efficiency as high as 4.1%.Item type:Item, Tunable optical wavelength conversion of OFDM signal using a periodically-poled lithium niobate waveguide(2009-05-25) ;Wu, Xiaoxia ;Peng, Wei-Ren ;Arbab, Vahid ;Wang, JianWillner, AlanWe experimentally demonstrate tunable optical wavelength conversion of a 10-Gb/s radio frequency (RF)-tone assisted orthogonal-frequency-division-multiplexing (OFDM) signal with similar to-5 dB (similar to 30%) efficiency over similar to 30 nm bandwidth using a periodically-poled lithium-niobate (PPLN) waveguide. A penalty of < 3 dB is obtained after wavelength conversion. Quadrature amplitude modulation (QAM) size and subcarrier number are varied to further evaluate the performance of the wavelength converter. (C) 2009 Optical Society of AmericaItem type:Item, Far-field of GaN film-transferred green light-emitting diodes with two-dimensional photonic crystals(2009-05-25) ;Lai, Chun-Feng ;Chi, Jim-Yong ;Kuo, Hao-Chung ;Yen, Hsi-HsuanLee, Chia-EnFar-field distributions of GaN-based photonic crystal (PhC) film-transferred light-emitting diodes (FT-LEDs) were investigated. The thickness of the device is about 840 nm. The emission wavelength is around 520 nm. The PhC region is a square lattice with a/lambda around 0.5. Angular-resolved measurements in the Gamma-X and Gamma-M directions were made in the polarized-resolved manner. Guided mode extraction behavior in agreement with the two-dimensional free-photon band calculation was observed. In addition, the pseudo-TM behavior for the non-collinearly coupled modes was observed. The azimuthal-mapping of the angular-resolved spectra revealed the evolution of the collinearly and the non-collinearly coupled modes. Furthermore, the light enhancement of similar to 2.7x and the collimation angle about 102.3 degrees were achieved. (c) 2009 Optical Society of AmericaItem type:Item, Generation of broadband two-dimensional multicolored arrays in a sapphire plate(2009-05-25) ;Liu, Jun ;Kobayashi, Takayoshi ;Wang, Zhiguang ;電子物理學系Department of ElectrophysicsBroadband 2-D multicolored arrays with more than ten periodic columns and more than ten rows were generated in a sapphire plate using two crossed femtosecond laser beams overlapping in time and space. These multicolored 2-D arrays were sensitive to rotation of the sapphire plate in the plane normal to the incident beams. The broadband spectrum, pulse duration less than 40fs, and less than 1%RMS power stability of the array signals make them well suited for various applications, for example multicolor pump-probe experiments. (C) 2009 Optical Society of AmericaItem type:Item, High output power density from GaN-based two-dimensional nanorod light-emitting diode arrays (vol 94, 141111, 2009)(2009-05-25) ;Lee, Ya-Ju ;Lin, Shawn-Yu ;Chiu, Ching-Hua ;Lu, Tien-ChangKuo, Hao-Chung