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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳永芳(Yang-Fang Chen) | |
| dc.contributor.author | Chen-You Su | en |
| dc.contributor.author | 蘇宸右 | zh_TW |
| dc.date.accessioned | 2021-06-16T05:34:56Z | - |
| dc.date.available | 2022-08-11 | |
| dc.date.copyright | 2020-09-15 | |
| dc.date.issued | 2020 | |
| dc.date.submitted | 2020-08-11 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/56561 | - |
| dc.description.abstract | 由於具備雷射等級光強、狹窄光譜帶寬及廣發光角度，隨機雷射已經吸引無數研究者投入心力，探索與其相關的各種潛在應用。在本文章中，我們將研究焦點投射在隨機雷射跟光學加密科技有關的應用，包含防偽列印技術、軍用敵我辨識系統，以及文件和資料的加密及防盜；為整合這些應用，我們提出多功能隨機雷射墨水的概念。為驗證此一概念，我們首先利用自發輻射和隨機雷射光譜的差異，來定義本系統的加密方式，並展示隱型簽名的應用。緊接者，我們藉由深入討論此隨機雷射系統的可調性，提出多位元加密的可行性。不僅如此，此隨機雷射墨水具有可製成暫態元件的特性，並且可以適用於不同材料的表面。考慮到此隨機雷射墨水的多功能性及簡便製作程序，我們相信它將很快能被實作於各種應用，並可幫助光學加密及防偽科技的創新與發展。 | zh_TW |
| dc.description.abstract | With the superiority of laser-level intensity, narrow spectral line-width, and broad-angular emission, random lasers (RLs) have drawn considerable research interests for their potential to carry out a variety of applications. In this work, the applications associated with optical encoded technologies, including security printing, military friend or foe identification (FFI) and anti-counterfeiting of documents are highlighted, and the concept of a transient RL “smart ink” has been proposed. The proof-of-concept was first demonstrated as invisible signatures, which encoded the messages through the spectral difference of spontaneous emission and RL under specified optical pumping. Next, the possibility for encoding the data with multi-bit signals was further confirmed by exploiting the threshold tunability of RLs. Moreover, the transient characteristic of this smart ink and its capability to be attached on freeform surfaces of different materials were also shown. With the advantages of facile manufacturing process and multiple purpose, it is expected that this ink can soon be carried out in a variety of practical utilities. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T05:34:56Z (GMT). No. of bitstreams: 1 U0001-2507202016552400.pdf: 6192715 bytes, checksum: 89c0176f8b8c0a3ab03973383e4a9b6d (MD5) Previous issue date: 2020 | en |
| dc.description.tableofcontents | 口試委員會審定書 2 誌謝 3 中文摘要 5 Abstract 6 Contents 7 List of Figures 9 Chapter 1 Introduction 12 Chapter 2 Theoretical Background 16 2.1 Photoluminescence (PL) 16 2.1.1 Introduction 16 2.1.2 Mechanism 17 2.2 Random Laser (RL) 20 2.2.1 Laser 20 2.2.2 Mechanism 23 2.2.3 Categories and Emission properties 24 2.2.4 Applications 27 2.3 Localized Surface Plasmon Resonance (LSPR) 30 2.4 Fluorescence Energy Transfer 36 2.4.1 Dipole Interaction 36 2.4.2 Förster Resonance Energy Transfer (FRET) 38 Chapter 3 Experimental Details 39 3.1 The List of Materials 39 3.2 Fabrication of Materials and Samples 39 3.3 The List of Instruments 44 3.4 Random Laser Measurement 44 3.5 Absorption Spectroscopy and Spectrophotometer 47 Chapter 4 Results and Discussion 49 4.1 Highlight of Major Contributions 49 4.2 Spontaneous Emission versus Random Laser – The 0/1 50 4.3 Tunability and Multi-bit Signals 53 4.4 Random Laser Characteristics on Different Substrates 58 4.5 The Transient Characteristic 61 Conclusion 63 Reference 64 | |
| dc.language.iso | en | |
| dc.subject | 隨機雷射 | zh_TW |
| dc.subject | 光學加密 | zh_TW |
| dc.subject | 防偽 | zh_TW |
| dc.subject | optical encoding | en |
| dc.subject | random laser | en |
| dc.subject | security ink | en |
| dc.title | 多功能隨機雷射墨水—光學加密系統及防偽技術方面的應用 | zh_TW |
| dc.title | Multifunctional Random Laser Smart Inks | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 108-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.author-orcid | 0000-0002-9051-4835 | |
| dc.contributor.oralexamcommittee | 謝雅萍(Ya-Ping Hsieh),許芳琪(Fang-Chi Hsu) | |
| dc.subject.keyword | 隨機雷射,防偽,光學加密, | zh_TW |
| dc.subject.keyword | random laser,security ink,optical encoding, | en |
| dc.relation.page | 69 | |
| dc.identifier.doi | 10.6342/NTU202001850 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2020-08-12 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理學研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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