東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Microwave and Millimeter-Wave Plasma...

Parsons, Stephen.

FindBook

Google Book

Amazon

博客來

Microwave and Millimeter-Wave Plasma Formation Within 2D Photonic Crystal Defects.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Microwave and Millimeter-Wave Plasma Formation Within 2D Photonic Crystal Defects./
作者:	Parsons, Stephen.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	150 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
Contained By:	Dissertation Abstracts International79-02B(E).
標題:	Plasma physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10620532
ISBN:	9780355345643

Microwave and Millimeter-Wave Plasma Formation Within 2D Photonic Crystal Defects.
Parsons, Stephen.

Microwave and Millimeter-Wave Plasma Formation Within 2D Photonic Crystal Defects. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 150 p.

Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.

Thesis (Ph.D.)--Tufts University, 2017.

Photonic crystals with integrated plasma elements have received increased attention in recent years due to the variable nature of their dielectric properties. To date, all such devices have included plasma elements that have been controlled using external power sources, most commonly, DC discharge tubes. Recent modeling work by Gregorio et al. suggest that an electromagnetic wave incident on a photonic crystal with a central point-defect vacancy enables self-initiated gas breakdown. The vacancy left by the point-defect creates a high-Q resonant cavity which enhances the electric field within the cavity to the point of gas breakdown. Once breakdown occurs, the plasma is also maintained within the vacancy by the incoming wave. In this thesis, I will explore the environmental variables (gas pressure, input power) that allow for a plasma to be formed and sustained, and the effect the plasma has on the incoming and outgoing electromagnetic wave. Design parameters and experimental results of two photonic crystal devices are included, one in the microwave frequency regime (~8.5 GHz) and one in the millimeter-wave regime (~43 GHz). I demonstrate that self-initiation of a plasma within the central vacancy is possible in 10 Torr of argon with as little as 1.4 W for the microwave device and 40 Torr of argon and 1.5 Watts for the millimeter-wave device. Once formed, the plasma filled cavity alters the transmission properties of the photonic crystal device, reducing transmission by up to 30 dB depending on gas pressure and power. Time domain measurements of plasma formation within the microwave device reveal formation times 100 ns at 5 Torr and 9W and up to 3.5 micros at 50 Torr and 4 W. Plasma formation time for the millimeter-wave device is as low as 180 ns at 400 Torr and as high as 800 ns at 45 Torr. Using transmission of energy through the photonic crystal as a diagnostic tool, electron densities of 1016 to 1017 m-3 are measured for the microwave device and 10 18 to 1020 m-3 for the millimeter-wave device.

ISBN: 9780355345643Subjects--Topical Terms:

3175417
Plasma physics.

Microwave and Millimeter-Wave Plasma Formation Within 2D Photonic Crystal Defects.
LDR:03005nmm a2200313 4500 001 2200963
005 20190329144316.5
008 201008s2017 ||||||||||||||||| ||eng d
020 $a 9780355345643
035 $a (MiAaPQ)AAI10620532
035 $a (MiAaPQ)tuftsase:12022
035 $a AAI10620532
040 $a MiAaPQ $c MiAaPQ
100 1 $a Parsons, Stephen. $3 3427693
245 1 0 $a Microwave and Millimeter-Wave Plasma Formation Within 2D Photonic Crystal Defects.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 150 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
500 $a Adviser: Jeffrey Hopwood.
502 $a Thesis (Ph.D.)--Tufts University, 2017.
520 $a Photonic crystals with integrated plasma elements have received increased attention in recent years due to the variable nature of their dielectric properties. To date, all such devices have included plasma elements that have been controlled using external power sources, most commonly, DC discharge tubes. Recent modeling work by Gregorio et al. suggest that an electromagnetic wave incident on a photonic crystal with a central point-defect vacancy enables self-initiated gas breakdown. The vacancy left by the point-defect creates a high-Q resonant cavity which enhances the electric field within the cavity to the point of gas breakdown. Once breakdown occurs, the plasma is also maintained within the vacancy by the incoming wave. In this thesis, I will explore the environmental variables (gas pressure, input power) that allow for a plasma to be formed and sustained, and the effect the plasma has on the incoming and outgoing electromagnetic wave. Design parameters and experimental results of two photonic crystal devices are included, one in the microwave frequency regime (~8.5 GHz) and one in the millimeter-wave regime (~43 GHz). I demonstrate that self-initiation of a plasma within the central vacancy is possible in 10 Torr of argon with as little as 1.4 W for the microwave device and 40 Torr of argon and 1.5 Watts for the millimeter-wave device. Once formed, the plasma filled cavity alters the transmission properties of the photonic crystal device, reducing transmission by up to 30 dB depending on gas pressure and power. Time domain measurements of plasma formation within the microwave device reveal formation times 100 ns at 5 Torr and 9W and up to 3.5 micros at 50 Torr and 4 W. Plasma formation time for the millimeter-wave device is as low as 180 ns at 400 Torr and as high as 800 ns at 45 Torr. Using transmission of energy through the photonic crystal as a diagnostic tool, electron densities of 1016 to 1017 m-3 are measured for the microwave device and 10 18 to 1020 m-3 for the millimeter-wave device.
590 $a School code: 0234.
650 4 $a Plasma physics. $3 3175417
650 4 $a Electromagnetics. $3 3173223
650 4 $a Electrical engineering. $3 649834
690 $a 0759
690 $a 0607
690 $a 0544
710 2 $a Tufts University. $b Electrical Engineering. $3 1030762
773 0 $t Dissertation Abstracts International $g 79-02B(E).
790 $a 0234
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10620532