An integrated heralded single photon source based on STIRAP  using Ti-PPLN waveguides

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李仰騰(Yang-Teng Li) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

(An integrated heralded single photon source based on STIRAP using Ti-PPLN waveguides)

相關論文

★ Continuous-wave narrow-line yellow laser generation in a diode-pumped Nd:YVO4 laser using volume Bragg gratings	★ 半導體雷射泵浦內建式Q-調制Nd:MgO:PPLN雷射之研究
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★ 非週期性晶格極化反轉鈮酸鋰作為主動式窄頻寬通多波長濾波器及倍頻多波長濾波器	★ 非週期性晶格極化反轉鈮酸鋰作為有效率的二倍頻和模態轉換器之研究
★ 積體式週期與非週期極性反轉鈮酸鋰光電與雷射元件	★ 退火式質子交換波導PPLN電光調制TM模態轉輻射偏振態之研究
★ 高效率雙Nd:YVO4 雷射和頻黃光產生系統	★ 以串級式電光週期性晶格極化反轉鈮酸鋰達成三波長主動式Q-調制Nd:YVO4雷射
★ 以單塊二維週期性晶格極化反轉鈮酸鋰同時作為Nd:YVO4雷射之電光Q調制器和腔內光參量振盪器	★ 綠光準相位匹配二倍頻質子交換鎂摻雜鈮酸鋰波導的製程研究
★ 以單晶片串級式週期性準相位匹配波長轉換器與非週期性準相位匹配電光偏振模態轉換器達成主動式調制窄頻輸出光參量振盪器之研究	★ 單片非週期性晶疇極化反轉鈮酸鋰同時作為Nd:YVO4雷射Q-調制和腔內光參量產生之研究
★ 準相位匹配二倍頻軟質子交換鎂摻雜鈮酸鋰波導研究	★ 以雙體積全像布拉格光柵及二維週期性晶疇極化反轉鈮酸鋰於Nd:YVO4雷射內達成脈衝式窄頻光參量振盪器之研究

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摘要(中)

近年來，由於量子科學相關研究的快速突破，新世代量子計算及加密通訊在這個時代即將變成可能，然而現今的量子系統多半建立於超導量子位元，其嚴苛的溫度要求、龐大的系統體積以及昂貴的造價仍然嚴重地限制了它的應用潛力。但是以單光子源作為媒介的量子系統卻不受到此限制，不但能夠操作於室溫，並且能夠直接整合於目前成熟的矽光子元件和光纖通訊網路，讓積體量子光路晶片成為可能。

本研究旨在開發高製程容忍度的積體化鈮酸鋰單光子晶片，包含準相位匹配結構、寬頻波導偏振分光器以及波長濾波器。透過絕熱耦合理論的計算，本研究縮短了以往絕熱偏振分光器的元件長度，同時保留其高製程容忍度以及寬頻運作的特性，並成功地將單光子源整合於同一晶片上。

摘要(英)

In recent years, the explosively growing field of quantum information science has driven a dramatic surge of research into developing single photon sources with high brightness, robustness and scalability. In this work, we have experimentally demonstrated the first fully-integrated heralded single photon source using ti-diffused periodically poled lithiun niobate (PPLN) waveguides. A novel design of ultra-broadband, highly fabrication tolerant PBS and pump filter based on spatial adiabatic passage is proposed. The measured PERs for TE and TM polarizations are greater than 15 dB over a wavelength range of 140 nm and 100 nm, respectively, even in the presence of near 1 µm width deviation. Due to the background noise caused by free space coupling and scattering, the highest PERs are limited to near 15 dB level, which will be further improved by endfacet fiber pigtailing.

關鍵字(中)

★ 積體化單光子源晶片
★ 自發參量下轉換光源
★ 偏振分光器
★ 高通濾波器
★ 週期式極化反轉結構
★ 準相位匹配

關鍵字(英)

★ Integrated heralded single photon source
★ PPLN
★ Stimulated Raman adiabatic passage
★ Adiabatic coupler
★ Polarization beam splitter
★ Pump filter

論文目次

Contents
Page
中文摘要 i
Abstract ii
Acknowledgements iii
Contents iv
List of figures vi
List of tables xiii
1 Introduction 1
1.1 Overview of Single Photon Sources . . . . . . . . . . . . . 1
1.2 Deterministic/Probabilistic Sources . . . . . . . . . . . . 3
1.3 Material Platforms . . . . . . . . . . . . . . . . . . . . . 5
1.4 Integrated Polarization Beam Splitters and Spectral Filters 6
2 Theoretical Background 12
2.1 Electromagnetic Waves in Nonlinear Optical Media . . . . 12
2.1.1 Nolinear Polarization . . . . . . . . . . . . . . . . 12
2.1.2 Wave Equation in Nonlinear Optical Media . . . . 15
2.2 The Coupled-mode Equations of Sum Frequency Generation18
2.2.1 The Coupled-mode Equations of SFG . . . . . . . 18
2.2.2 Phase Matching of SFG . . . . . . . . . . . . . . . 20
2.3 Quasi-phase Matching . . . . . . . . . . . . . . . . . . . . 22
2.4 Quantum Mechanical Description of Spontaneous Parametric Down Conversion . . . . . . . . . . . . . . . . . . 25
iv
2.4.1 Joint Spectrum Amplitude . . . . . . . . . . . . . 25
2.4.2 The Quantum State Generated by SPDC . . . . . 30
2.5 Stimulated Raman Adiabatic Passage . . . . . . . . . . . 35
2.5.1 STIRAP in Atomic Level Systems . . . . . . . . . 36
2.5.2 STIRAP in Evanescently-coupled Waveguide Systems . . . . . . . . . . . . . . . . . . . . . . . . . 40
2.5.3 Polarization Beam Splitters Based on STIRAP . . 41
2.5.4 High-pass Filters Based on STIRAP . . . . . . . . 45
3 Simulations 49
3.1 Polarization Beam Splitters Based on STIRAP . . . . . . 50
3.2 Pump Filters Based on Frequency-swept STIRAP . . . . . 58
4 Experimental Setups 64
5 Fabrication Process 67
5.1 Titanium In-diffusion . . . . . . . . . . . . . . . . . . . . 67
5.2 Electric Field Poling . . . . . . . . . . . . . . . . . . . . . 68
6 Experimental Results and Discussions 72
6.1 Spectral Characteristics of SFG . . . . . . . . . . . . . . 72
6.2 PER and ER Spectra . . . . . . . . . . . . . . . . . . . . 73
6.3 Coincidence Counting . . . . . . . . . . . . . . . . . . . . 82
7 Conclusion and outlook 87
Bibliography 90

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98

指導教授

陳彥宏(Yen-Hung Chen)

審核日期

2021-1-11

推文