Full metadata record
DC FieldValueLanguage
dc.contributor.author李彥群en_US
dc.contributor.authorLee, Yen-Chunen_US
dc.contributor.author余沛慈en_US
dc.contributor.authorYu, Pei-Chenen_US
dc.date.accessioned2014-12-12T01:40:40Z-
dc.date.available2014-12-12T01:40:40Z-
dc.date.issued2009en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#GT079724538en_US
dc.identifier.urihttp://hdl.handle.net/11536/45121-
dc.description.abstract本論文主要是在探討,利用光子晶體微共振腔的特性提高非極性氮化銦鎵/氮化鎵量子井的自發輻射。在一般的假設下,自發性輻射速率的提高可以使用Purcell factor來定義,而Purcell factor在定義上只與共振腔共振模態的品質因子(Quality factor)與等效模態體積(effective modal volume)有關,本研究從費米黃金定律(Fermi golden rule)出發推導Purcell factor,推導的過程中發現,自發輻射速率的增強除了與品質因子(Q-factor) 以及等效膜態體積(effective modal volume) (Vm)有關外,還與光源的自發輻射以及共振模態的極化特性有關。 本文分兩大部分討論,第一部份討光子晶體共振腔的設計,我們討論光子晶體共振腔的空氣柱的調變對品質因子(Q-factor)、共振模態的等效膜態體積(Vm) 以及共振模態的極化特性的影響,並藉由空氣柱的調變將光子晶體共振腔做最佳化設計;第二部分討論a-plane氮化銦鎵/氮化鎵單一量子井,隨著調整不同的銦含量與量子井的厚度,其自發輻射的電場極化特性將會有所改變,我們考慮自發輻射與共振模態的極化特性計算得到自發輻射增強因子(Spontaneous emission enhancement factor, SpE factor),與Purcell factor 做比較,最後我們發現到在當自發輻射在低極化率下必須將Purcell factor 因子做修正,而在高極化率的情況下SpE-factor 會與Purcell factor非常地接近。zh_TW
dc.description.abstractIn this article, we discussed the utilization of photonic crystal microcavity for the enhancement of spontaneous emission rate of the a-plane InGaN/GaN single quantum well by reducing threshold power of laser. In general assumption, spontaneous emission rate enhancement factor can be defined by Purcell factor, and Purcell factor is proportional to the quality factor of photonic crystal microcavity and inversely-proportional to effective modal volume of cavity mode. We derived the Purcell factor from Fermi golden rule. During the deriving process, we found the spontaneous emission rate enhancement factor is not only related to the quality factor and effective modal volume of cavity mode but also polarization characteristic of spontaneous emission rate and cavity mode. In the first of the thesis, we discussed the influence of the quality factor, effective modal volume and polarization characteristic of cavity mode by tuning air holes of photonic crystal microcavity. And we optimize the photonic crystal microcavity by tuning air hole. In the second part, we discuss the variation of polarization characteristic of spontaneous emission rate of a-plane InGaN/GaN single quantum well by different indium composition and quantum well width. Finally, the calculated spontaneous emission enhancement factor considering polarization characteristic of spontaneous emission rate and cavity mode was compared with Purcell factor. We found the value of spontaneous emission enhancement factor in high polarization was closed to Purcell factor but the Purcell factor in low polarization ratio needed to be revised.en_US
dc.language.isozh_TWen_US
dc.subject氮化鎵zh_TW
dc.subject光子晶體zh_TW
dc.subject自發輻射zh_TW
dc.subjectGaNen_US
dc.subjectPhotonic crystalen_US
dc.subjectSpontaneous emissionen_US
dc.title調變a面氮化鎵銦/氮化鎵光子晶體極化特性以增強自發性輻射zh_TW
dc.titleManipulative Polarization of a-plane InGaN/GaN Photonic Crystals for Enhanced Spontaneous Emissionen_US
dc.typeThesisen_US
dc.contributor.department光電工程學系zh_TW
Appears in Collections:Thesis


Files in This Item:

  1. 453801.pdf

If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.