Browsing by Issue Date, starting with "2018-05-24"

Now showing 1 - 20 of 10677

Deep-Ultraviolet Hyperbolic Metacavity Laser
(2018-05-24)
Shen, Kun-Ching
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Ku, Chen-Ta
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Hsieh, Chiieh
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Kuo, Hao-Chung
;
Cheng, Yuh-Jen
Given the high demand for miniaturized optoelectronic circuits, plasmonic devices with the capability of generating coherent radiation at deep subwavelength scales have attracted great interest for diverse applications such as nanoantennas, single photon sources, and nanosensors. However, the design of such lasing devices remains a challenging issue because of the long structure requirements for producing strong radiation feedback. Here, a plasmonic laser made by using a nanoscale hyperbolic metamaterial cube, called hyperbolic metacavity, on a multiple quantum-well (MQW), deep-ultraviolet emitter is presented. The specifically designed metacavity merges plasmon resonant modes within the cube and provides a unique resonant radiation feedback to the MQW. This unique plasmon field allows the dipoles of the MQW with various orientations into radiative emission, achieving enhancement of spontaneous emission rate by a factor of 33 and of quantum efficiency by a factor of 2.5, which is beneficial for coherent laser action. The hyperbolic metacavity laser shows a clear clamping of spontaneous emission above the threshold, which demonstrates a near complete radiation coupling of the MQW with the metacavity. This approach shown here can greatly simplify the requirements of plasmonic nanolaser with a long plasmonic structure, and the metacavity effect can be extended to many other material systems.
Flexible Organic Thin Film Transistors Incorporating a Biodegradable CO2-Based Polymer as the Substrate and Dielectric Material
(2018-05-25)
Rullyani, Cut
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Sung, Chao-Feng
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Lin, Hong-Cheu
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Chu, Chih-Wei
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材料科學與工程學系
Employing CO2-based polymer in electronic applications should boost the consumption of CO2 feedstocks and provide the potential for non-permanent CO2 storage. In this study, polypropylene carbonate (PPC) is utilized as a dielectric and substrate material for organic thin film transistors (OTFTs) and organic inverter. The PPC dielectric film exhibits a surface energy of 47 mN m(-1), a dielectric constant of 3, a leakage current density of less than 10(-6) A cm(-2), and excellent compatibility with pentacene and PTCDI-C8 organic semiconductors. Bottom-gate top-contact OTFTs are fabricated using PPC as a dielectric; they exhibits good electrical performance at an operating voltage of 60 V, with electron and hole mobilities of 0.14 and 0.026 cm(2)V(-1)s(-1), and on-to-off ratios of 105 and 103, respectively. The fabricated p-and n-type transistors were connected to form a complementary inverter that operated at supply voltages of 20 V with high and low noise margins of 85 and 69%, respectively. The suitability of PPC as a substrate is demonstrated through the preparation of PPC sheets by casting method. The fabricated PPC sheets has a transparency of 92% and acceptable mechanical properties, yet they biodegraded rapidly through enzymatic degradation when using the lipase from Rhizhopus oryzae.
Highly Responsive Blue Light Sensor with Amorphous Indium-Zinc-Oxide Thin-Film Transistor based Architecture
(2018-05-25)
Liu, Po Tsun
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Ruan, Dun Bao
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Yeh, Xiu Yun
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Chiu, Yu Chuan
;
Zheng, Guang Ting
A single layer of amorphous InZnO is chosen as the channel material for a thin film transistor (TFT)-based driver and sensing layer for a blue-light sensor, respectively, with a completely compatible process integrated into in-cell embedded photo sensor architecture. The photo sensor exhibits a high optical responsivity (1280 A/W) and excellent signal to noise ratio (similar to 10(5)) under the blue light illumination. Afterwards, the detail studies and important issues about the sensing and material characteristics of a-IZO thin film in the TFT sensor are well discussed. The results suggest that the numbers of the deep, neutral oxygen vacancy are the key factors for carrier generation under illumination. In addition, a positive gate pulse is applied on the devices to eliminate persistent photoconductivity in order to ensure the recover ability for the photo sensor application. The practical concepts of a sensor circuit, which can be integrated on RGB pixel with interactive display, are also proposed on the basis of photo sensor TFT.
Atomic-scale mechanism of internal structural relaxation screening at polar interfaces
(2018-05-25)
Li, Mingqiang
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Cheng, Xiaoxing
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Li, Ning
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Liu, Heng-Jui
;
Huang, Yen-Lin
The effective screening of the polarization bound charge is a prerequisite to stabilize the ferroelectricity in ferroelectric thin films. Here, by combining annular bright field imaging and electron energy-loss spectroscopy (EELS) in an aberration-corrected scanning transmission electron microscope with phase-field simulations, we investigate the screening mechanism by quantitatively measuring the structural relaxation at Pb(Zr0.2Ti0.8)O-3/SrTiO3 interfaces. We find that the thickness of the interfacial layer is similar to 3.5 unit cells (similar to 1.4 nm) in a domain with upward polarization and similar to 5.5 unit cells (similar to 2.2 nm) in a domain with downward polarization. Phase-field simulations, an EELS analysis, and a lattice parameter analysis verify the existence of interfacial oxygen vacancies accounting for the narrower interfacial layer in the domain with upward polarization. Our study indicates the internal structural relaxation at the interface is the dominant mechanism for the polarization charge screening for ferroelectric films grown on insulating substrates and has implications for our understanding of domain switching in ferroelectric devices.
戀愛遊戲　虛擬中的愛情
(2018-05-27)
黃昱晉
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Department of Communication and Technology
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傳播與科技學系
【當愛受「商」】專題

探討戀愛遊戲吸引人的要素，以及如何讓玩家沉浸當中。
戀愛課程　單身的愛情秘笈
(2018-05-27)
甘愷璇
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關子茵
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Department of Communication and Technology
;
傳播與科技學系
【當愛受「商」】專題

坊間出現越來越多戀愛相關課程的補習班，究竟愛情該怎麼學習？戀愛葵花寶典真的存在嗎？本篇報導將帶您一窺愛情學分的酸甜苦辣。
羅馬拼音：母語教學的基礎
(2018-05-27)
謝宛蓁
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Department of Communication and Technology
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傳播與科技學系
【注音符號：中文巴別塔】專題

立委葉宜津在提出「廢除ㄅㄆㄇ」政見時，宣稱羅馬拼音能夠拼出所有的語言，也有助於母語學習，但「蝌蚪文」的說法，卻使得之後的討論圍繞在羅馬拼音與外語的關係上，忽略了「母語和羅馬拼音」這個重要的議題。
素食飲食的利與弊
(2018-05-27)
楊佩臻
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Department of Communication and Technology
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傳播與科技學系
【飲食與健康】專題

素食者是否真的能夠達到營養均衡？是否會對人體帶來助益或是造成不易見的傷害？
總編輯的話
(2018-05-27)
林明慧
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Department of Communication and Technology
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傳播與科技學系
本期為喀報291期，稿件共計16篇，媒材類型包含文字、照片故事、新聞圖表、廣播及影音新聞，相當豐富多元。另外，本期專題「當愛受『商』」透過不同的媒材，帶領讀者了解現代人對於愛情的需求是如何被商品化。
情人節商機：花店解密
(2018-05-27)
吳佩芸
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戴淨妍
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Department of Communication and Technology
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傳播與科技學系
【當愛受「商」】專題

透過資訊圖表帶領讀者了解情人節送花的眉眉角角，及花店店員觀察到的最新趨勢。
青少年小祕密　交友軟體大調查
(2018-05-27)
蔡亞融
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Department of Communication and Technology
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傳播與科技學系
【色世未深　未成年網路時代】專題
交友軟體是什麼，原來現在交友軟體在青少年間蔚為風潮？本篇圖表透過問卷調查，來告訴你青少年在想什麼，以及交友軟體有哪些特點，讓它成為時下青少年交友的新方式。
竹塹玻璃產業小知識
(2018-05-27)
林育平
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Department of Communication and Technology
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傳播與科技學系
【竹塹工藝傳承與沒落】專題

玻璃，是眾所皆知的新竹傳統產業代表，而為何聚集於新竹又是如何產出，將由此圖表大解密。
養成系培訓　台灣偶像新出路？
(2018-05-27)
巫尹文
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Department of Communication and Technology
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傳播與科技學系
【台灣偶像團體的困境與未來】專題

除了近幾年流行的練習生制度外，其實養成系也是偶像培訓的一種方式。究竟什麼是養成系？這種方式在台灣又是否可行呢？
當愛成為商品　真心猶存嗎？
(2018-05-27)
黃珮瑄
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Department of Communication and Technology
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傳播與科技學系
【當愛受「商」】專題

當愛情變得商品化，愛情是否還是原本美好的模樣？
王世偉　從動畫看見文化
(2018-05-27)
徐仟妤
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Department of Communication and Technology
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傳播與科技學系
【台灣動畫的美麗與哀愁】專題

專訪原金國際創辦人王世偉，認識他的3D動畫之路。
當愛受「商」
(2018-05-27)
戴淨妍
;
黃珮瑄
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吳佩芸
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黃昱晉
;
甘愷璇
透過本專題，了解現代人的戀愛需求是如何被商品化。
實況看什麼？女性實況主的處境
(2018-05-27)
陳映瑜
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Department of Communication and Technology
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傳播與科技學系
【電競界的透明天花板】專題

淺談女性在實況圈中的處境。
從學生籃球到職業賽場
(2018-05-27)
鄭仰珉
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Department of Communication and Technology
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傳播與科技學系
【褪下球衣的籃球夢】專題

每年總有許多學生籃球員，夢想著將打籃球作為職業，但真的有這麼簡單嗎？
自由潛水　徜徉大海的極限運動
(2018-05-27)
王沛軒
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Department of Communication and Technology
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傳播與科技學系
【海之島：潛水天堂還是生態葬地？】專題

自由潛水（Free diving）的興起，讓原先就是潛水天堂的綠島，在夏日旺季湧入更多潛客從事觀光活動。自由潛水是什麼？它的魅力又在哪裏？帶你親赴綠島一探究竟！
猴硐貓友社　除蚤者聯盟
(2018-05-27)
劉翊安
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Department of Communication and Technology
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傳播與科技學系
【歡迎來到喵星人的世界】專題

猴硐貓友社是民眾自發性的社團，每季都會在猴硐辦理大掃除活動，幫當地貓咪除蚤、整理環境。