Browsing by Issue Date, starting with "2011-03-14"

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Mitigation of Rayleigh backscattering in 10-Gb/s downstream and 2.5-Gb/s upstream DWDM 100-km long-reach PONs
(2011-03-14)
Chow, C. W.
;
Yeh, C. H.
;
光電工程學系
;
Department of Photonics
Long-reach passive optical network (LR-PON) is considered as a promising technology towards higher capacity and extended coverage optical system. We propose and demonstrate a LR-PON with the capability of Rayleigh backscattering (RB) noise mitigation. By using the upstream signal wavelength-transition generated by a dual-parallel Mach-Zehnder modulator (DP-MZM) based colorless optical networking unit (ONU), the spectral overlap among the upstream signal and the RB noises can be minimized. Hence, due to the achievement of effective RB mitigation, a 100 km LR-PON with a high split-ratio of 512 is demonstrated using 10 Gb/s non-return-to-zero (NRZ) downstream and 2.5 Gb/s NRZ upstream signals. Detail analysis of the wavelength-transition generation is presented. (C) 2011 Optical Society of America
Superconducting to spin-glass state transformation in beta-pyrochlore KxOs2O6
(2011-03-14)
Lee, C. C.
;
Lee, W. L.
;
Lin, J. -Y.
;
Tsuei, C. C.
;
Lin, J. G.
beta-pyrochore KOs2O6, which shows superconductivity below similar to 9.7 K, has been converted into KxOs2O6 (x less than or similar to 2/3-1/2) electrochemically to show spin-glass-like behavior below similar to 6.1 K. A room-temperature sample surface potential versus charge transfer scan indicates that there are at least two two-phase regions for x between 1 and 0.5. A rattling model of superconductivity for the title compound has been examined using electrochemical potassium de-intercalation. The significant reduction of superconducting volume fraction due to minor potassium reduction suggests the importance of defect and phase coherence in the rattling model. Magnetic susceptibility, resistivity, and specific heat measurement results have been compared between the superconducting and spin-glass-like samples.
Energy transfer from InGaN quantum wells to Au nanoclusters via optical waveguiding
(2011-03-14)
Shu, G. W.
;
Lin, C. C.
;
Lin, H. T.
;
Lin, T. N.
;
Shen, J. L.
We present the first observation of resonance energy transfer from InGaN quantum wells to Au nanoclusters via optical waveguiding. Steady-state and time-resolved photoluminescence measurements provide conclusive evidence of resonance energy transfer and obtain an optimum transfer efficiency of similar to 72%. A set of rate equations is successfully used to model the kinetics of resonance energy transfer. (C) 2011 Optical Society of America
Superconducting to spin-glass state transformation in beta-pyrochlore K(x)Os(2)O(6)
(2011-03-14)
Lee, C. C.
;
Lee, W. L.
;
Lin, J. -Y.
;
Tsuei, C. C.
;
Lin, J. G.
beta-pyrochore KOs(2)O(6), which shows superconductivity below similar to 9.7 K, has been converted into K(x)Os(2)O(6) (x less than or similar to 2/3-1/2) electrochemically to show spin-glass-like behavior below similar to 6.1 K. A room-temperature sample surface potential versus charge transfer scan indicates that there are at least two two-phase regions for x between 1 and 0.5. A rattling model of superconductivity for the title compound has been examined using electrochemical potassium de-intercalation. The significant reduction of superconducting volume fraction due to minor potassium reduction suggests the importance of defect and phase coherence in the rattling model. Magnetic susceptibility, resistivity, and specific heat measurement results have been compared between the superconducting and spin-glass-like samples.
Balanced carrier transport in organic solar cells employing embedded indium-tin-oxide nanoelectrodes (vol 98, 073308, 2011)
(2011-03-14)
Hsu, Min-Hsiang
;
Yu, Peichen
;
Huang, Jen-Hsien
;
Chang, Chia-Hua
;
Wu, Chien-Wei
Displacement reaction of Pt on carbon-supported Ru nanoparticles in hexachloroplatinic acids
(2011-03-14)
Hsieh, Yu-Chi
;
Chang, Li-Chung
;
Wu, Pu-Wei
;
Chang, Yun-Min
;
Lee, Jyh-Fu
The displacement reaction of Pt on Ru to form a Ru core and Pt shell (Ru@Pt) bimetallic structure is investigated by immersing the carbon-supported Ru nanoparticles in hexachloroplatinic acids with pH of 1,2.2. and 8, followed by a hydrogen reduction treatment. Results from inductively coupled plasma mass spectrometry suggest that the dissolution of Ru is mostly caused by the reduction of Pt cations. Images from transmission electron microscopy demonstrate a uniform distribution of Ru@Pt in size of 3-5 nm. Spectra from X-ray absorption near edge structure and extended X-ray absorption fine structure confirm that the pH value of hexachloroplatinic acid determines the type of ligands complexing the Pt cations that affects their activity and consequently the severity of displacement reaction and alloying degree of Ru@Pt nanoparticles. As a result, the samples from pH 1 bath reveal a desirable core-shell structure that displays a reduced onset potential in CO stripping and stable catalytic performance for H(2) oxidation while the samples from pH 8 bath indicate the formation of Pt clusters on the Ru surface that leads to poor CO stripping and H(2) oxidation characteristics. (C) 2011 Elsevier B.V. All rights reserved.
Effects of geometrical shape dispersion on inhomogeneous broadening of excitonic peaks of semiconductor nano-objects
(2011-03-14)
Thu, L. M.
;
Chiu, W. T.
;
Voskoboynikov, O.
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
We present an efficient method for simulation of the inhomogeneous broadening of photoluminescence peaks of dispersive ensembles of semiconductor nano-objects. Using our mapping method for geometrical and material parameters of the objects, we managed to connect the position, asymmetry, and width of the photoluminescence emission peaks of ensembles of the objects to the actual dispersion of the geometrical shapes of the objects. The mapping method allows us to very efficiently reproduce and explain experimental data on the photoluminescence of dispersive ensembles of triple concentric GaAs/AlGaAs nano-rings, i.e., nano-objects with a very sophisticated three-dimensional geometry.
Electrical performance and thermal stability of MIC poly-Si TFTs improved using drive-in nickel induced crystallization
(2011-03-15)
Lai, Ming-Hui
;
Wu, Yew Chung Sermon
;
Chang, Chih-Pang
;
材料科學與工程學系
;
Department of Materials Science and Engineering
Ni-metal-induced crystallization (MIC) of amorphous Si (alpha-Si) has been used to fabricate low-temperature polycrystalline silicon (poly-Si) thin-film transistors (TFTs). The current crystallization technology, however, often leads to trap Ni and NiSi(2) precipitates, which degrade the device performance. In this study, a new manufacturing method for poly-Si TFTs using drive-in Ni induced crystallization (DIC) was proposed. In DIC, F(+) implantation was used to drive Ni in the alpha-Si layer. It was found that the electrical performance (especially leakage current) and thermal stability of DIC-TFTs were improved due to the reduction of Ni concentration and passivation of trap states near the SiO(2)/poly-Si interface. (C) 2010 Elsevier B.V. All rights reserved.
Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders
(2011-03-15)
Chia, C. H.
;
Chen, J. N.
;
Han, T. C.
;
Chiou, J. W.
;
Lin, Y. C.
We found that the exciton-phonon coupling in the Zn(1-x)Mg(x)O powders (0.01 <= x <= 0.07) is greatly influenced by the crystalline-size. Two well-resolved photoluminescence (PL) bands due to recombination of free exciton and its longitudinal optical (LO)-phonon replicas enable us to analyze the relative intensities among free excitons, one-LO-phonon replicas, and two-LO-phonon replicas. As crystalline size increases, a larger enhancement of the PL-intensity ratio of a free exciton to its LO-phonon replicas was found compared to that of two LO-phonon replica to one-LO-phonon replica. (C) 2011 American Institute of Physics. [doi:10.1063/1.3563574]
PAACP: A portable privacy-preserving authentication and access control protocol in vehicular ad hoc networks
(2011-03-15)
Yeh, Lo-Yao
;
Chen, Yen-Cheng
;
Huang, Jiun-Long
;
資訊工程學系
;
Department of Computer Science
Recently, several studies addressed security and privacy issues in vehicular ad hoc networks (VANETs). Most of them focused on safety applications. As VANETs will be available widely, it is anticipated that Internet services could be accessed through VANETs in the near future. Thus, non-safety applications for VANETs would rise in popularity. This paper proposes a novel portable privacy-preserving authentication and access control protocol, named PAACP, for non-safety applications in VANETs. In addition to the essential support of authentication, key establishment, and privacy preservation, PAACP is developed to provide sophisticated differentiated service access control, which will facilitate the deployment of a variety of non-safety applications. Besides, the portability feature of PAACP can eliminate the backend communications with service providers. Therefore, better performance and scalability can be achieved in PAACP. (C) 2010 Elsevier B.V. All rights reserved.
Beyond-Bandwidth Electrical Pulse Modulation of a TO-Can Packaged VCSEL for 10 Gbit/s Injection-Locked NRZ-to-RZ Transmission
(2011-03-15)
Lin, Chia-Chi
;
Chi, Yu-Chieh
;
Kuo, Hao-Chung
;
Peng, Peng-Chun
;
Chang-Hasnain, Connie J.
The parametric characterization of a nonreturn-to-zero (NRZ) to return-to-zero (RZ) data format converter based on the external optical NRZ injection of a TO-46-can packaged vertical-cavity surface-emitting laser (VCSEL) directly modulated by a 10 GHz electrical pulse is demonstrated. The electrical-pulse modulation induced gain switching of the VCSEL is initiated under external optical NRZ data injection that increases the relaxation oscillation frequency of the homemade VCSEL from 2.2 to 7.4 GHz, thereby enabling its electrical modulation bandwidth up to 10 GHz. The external NRZ injection reduces the lasing threshold and enlarges the modulation depth of the VCSEL so that the converted RZ data pulsewidth can be shortened to 27 ps with a slightly increased peak-to-peak negative frequency chirp of 4.3 GHz (corresponding to a chirp parameter of 122 MHz/ps). The chirp and bit error rate (BER) display strong correlations with the injection power and the biased current of the VCSEL. With external injection, the receiving power required for achieving a BER below 10(-9) at 10 Gbit/s is -19.5 dBm, and a power penalty of 16 dB is observed when the dc bias of the electrical-pulse modulated VCSEL is decreased by only 10% from the threshold condition.
全平面天線及其電磁能隙結構
(2011-03-16)
鍾世忠
;
凌菁偉
;
楊子嫻
一種電磁能隙結構，包含一電路板、接地層與複數個電磁能隙結構單元。電路板包含兩相對的一第一表面與一第二表面，而接地層則位於第一表面。複數個電磁能隙結構單元形成於第一表面與第二表面上，彼此間隔排列且分別連接於接地層之一邊，其中每一電磁能隙結構單元包含一第一走線、一第二走線與一連通柱。第一走線形成於電路板之第一表面，並且第一細走線具有一相對短細線與一相對長細線，而相對短細線與相對長細線相互連接，其中相對短細線更連接至接地層。第二細走線形成於第二表面，並且部分對齊於第一長細線。連通柱則貫穿電路板，使第二細走線得以透過連通柱連接相鄰之電磁能隙結構單元中的第一細走線。
可撓式藥物傳送晶片、其之製備方法與用途
(2011-03-16)
陳三元
;
黃薇蓁
;
劉典謨
在此揭示一種可撓式藥物傳送晶片。此可撓式藥物傳送晶片包含建構在可撓式基板上的藥物釋放腔室。此藥物釋放腔室的特徵是在基板上依序沉積有：一層含有藥物的奈米顆粒層，以及一層金屬層；且腔室的一側保持未密封狀態，以做為後續可供藥物流出的出口，該藥物則是以磁場誘發而自奈米顆粒中釋出。
行動用戶代理位址跨層對映方法
(2011-03-16)
陳耀宗
;
賈文康
本發明揭露一種行動用戶代理位址跨層對映方法，其為可用於行動IPv4代理網路環境中的行動用戶代理位址快速跨層對映及解析的方法，包含由內而外轉送程序及由外而內轉送程序。藉此使行動用戶無論在移動前後，大部分的封包皆得以直接透通，而不需執行任何位址置換運算、重新封裝以及中繼轉送的動作，進而提高行動IPv4代理網路的效能。
具有脈衝噴氣清洗放電電極線的濕式靜電集塵器
(2011-03-16)
蔡春進
;
林冠宇
一種具有脈衝噴氣用以清潔放電電極線的濕式靜電集塵器，包含有一外殼、三放電電極線、二表面粗糙且塗敷TiO2或SiO2奈米微粒的收集電極、二多孔金屬板以及二粗糙且塗敷TiO2或SiO2奈米微粒之玻璃平板；多孔金屬板以及玻璃平板位於該收集電極之頂側，用以提高流經收集電極水膜之均勻度，當微粒被導入濕式靜電集塵器內部時，微粒可藉由電場以及擴散充電機制而帶電，並在靜電力之作用下朝收集電極移動，隨後被水膜沖洗去除，另外，經由收集電極板上之通氣小孔而噴出之脈衝噴氣更可清除放電電極線表面累積之微粒，而可避免電暈強度之降低並提高使用壽命。
可移動式生理監測系統及其方法
(2011-03-16)
林進燈
;
林伯昰
;
王有德
;
趙志峰
;
王怡然
本發明提供一種可移動式生理監測系統及其方法，包括一信號擷取裝置、一可攜式信號監測裝置及一遠端伺服器，利用信號擷取裝置擷取使用者之生理信號，透過短距離無線傳輸之方式將其傳送至可攜式信號監測裝置，可攜式信號監測裝置連續記錄並分析生理信號，定時將生理信號傳送至遠端伺服器。可攜式信號監測裝置並包含一衛星定位系統模組可獲知使用者之位置，且包含一微陀螺儀或微加速規以偵測使用者是否發生跌倒之狀況，若偵測到生理信號異常或是跌倒狀況訊號，則透過電信網路或網際網路送出警告訊息至遠端伺服器，以便後續進行醫護動作，以達到監測使用者健康狀態之目的。
具有二段喉部的濕壁型文氏洗滌器
(2011-03-16)
蔡春進
一種具有二段喉部的濕壁型文氏洗滌器，係包含有一文氏管、二導管以及一儲槽，文氏管具有一收縮段、一喉部以及一擴張段，喉部係連接於收縮段及擴張段之間，導管係以其頂端與文氏管收縮段之底端連接，儲槽則是連接於導管之底端；藉此，用以潤濕管壁之洗滌水可即時洗除附著於收縮段管壁之微粒，隨後不經由文氏管喉部而可直接經由導管流動至儲槽，故可避免微粒堆積於文氏收縮段而導致阻塞，並避免了文氏管壓損異常升高的現象。
二階重排多項式交織器位址產生裝置與方法
(2011-03-16)
李順吉
;
王忠炫
;
沈文和
一種二階重排多項式交織器位址產生裝置，包含一基礎遞迴單元、以及表示為第一至第L遞迴單元的L個遞迴單元，L是大於1的整數。此裝置根據QPP函數Π(i)=(f1i+f2i2)mod k，輸入數個可配置參數，並藉由此基礎遞迴單元依序產生出多個交織器位址，藉由此第一至第L遞迴單元平行產生出L組相對應的交織器位址，其中，Π(i)是此裝置產生的第i個交織器位址，f1與f2是QPP係數，k是一輸入序列的資訊區塊長度，0≦i≦k-1。
有機太陽能元件及其製作方法
(2011-03-16)
陳方中
;
李佳霖
;
吳志力
本發明係有關於一種有機太陽能元件及其製作方法，係包括：一基板；一第一電極，係設於基板上；一電洞傳輸層，係設於第一電極上；一有機主動層，係設於電洞傳輸層上；以及一第二電極，係設於有機主動層上。其中，電洞傳輸層係包括一導電性高分子、以及一金屬奈米粒子。
輕觸式遙控系統
(2011-03-16)
林進燈
;
蘇木春
;
葉錦諺
;
邱國鈞
;
林彥廷
本發明揭露一種輕觸式遙控系統，其利用處理器整合受控裝置之操作選項，並編排成控制畫面呈現在螢幕畫面上，接著利用輕觸式微動開關作輸入控制，由於處理器編制之控制畫面係將受控裝置之控制操作分層別類地進行編排，具有組織性、邏輯性以及連續性，因此使用者藉由觀察螢幕畫面後，在加以操控微動開關即可以遙控任一連接之受控裝置動作。本發明輔佐使用者將生活周遭常使用的裝置或家電作整合控制，經過簡易指導後，任何人將能夠依照自我意識遙控連結裝置之運作。