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evanescent adj.1.(印象等)漸漸消失的。2.快消滅的;短暫的,...

evangel

Because of the complexity and particularity of evanescent waves , a pure theoretical treatment can only provide a qualitative description , a well - developed 3d em code , sos6 which is based on the magic command language with the finite difference time domain method , is used to simulating the em evanescent waves in this article 由于消失波的復雜性和特殊性,難已進行解析理論分析,為此,本論文采用基于時域有限差分方法的3d電磁場分析軟件對消失波的特性進行模擬分析。

The fresh - crowned hero fell without firing a shot . a certain amy lawrence vanished out of his heart and left not even a memory of herself behind . he had thought he loved her to distraction ; he had regarded his passion as adoration ; and behold it was only a poor little evanescent partiality 一個叫艾美勞倫斯的姑娘立刻從他的心目中消失了而且不留一點痕跡,他原以為他愛她愛得發狂,而且他把自己這種愛當作深情的愛慕,不過旁人看來那不過是一種可憐渺小變幻無常的愛戀罷了。

It comprises the study of the thin film for the hydrogen sensing and the deposition technique , a surface plasmon resonance , the field distribution around the optical fiber , analysis of the power of evanescent field , the measurement approach and the data processing etc . the hydrogen sensors using evanescent field fiber is of complex technics and high sensitive 其中涉及了氫敏感膜的研究及其生長工藝、光在光波導的傳輸模式分析、光纖中漸逝場的能量分析、光學表面等離子共振技術、氫氣傳感器的檢測技術等。漸逝場型光纖氫氣傳感器是一款工藝要求非常高,靈敏度高,穩定性強,可以進行復用的新穎的光學氫氣傳感器。

The design and implementation of hydrogen sensors using evanescent field fiber is introduced in this thesis . the research work mainly includes the hydrogen sensing principle of pd film , the principle of surface plasmon resonance , study of highly steady laser light , fabrication of the tapered fiber and etched fiber , the deposition of pd film , the encapsulation of sensor and the experimental results ( including the design of the set - up ) and the discussions 本論文主要圍繞實現漸逝場型光纖氫氣傳感器,開展了以下一些相關的技術性研究:鈀的氫敏感原理、表面等離子共振原理、穩定化光源的研究、拉錐型光纖和腐蝕型光纖的制作、薄膜的生長、傳感頭的封裝和傳感系統的實驗及結果分析。

Our study shows that the optical potential of the diffracted light of the semi - gaussian beam is far higher than that of the evanescent - light wave , and its maximum normal velocity of the incident atoms can be far grater than that of the evanescent - light wave under the same parameters , so the blue - detuned semi - gaussian beam , as a novel atomic mirror , can be used to efficiently reflect atoms with a normal velocity of greater than 1 m / s 研究表明,半束蘭失諧高斯光束衍射光場的光學勢遠大于消逝波光場的光學勢,在同樣的參數條件下,入射原子的最大速度也比消逝波光場的大,所以作為一種新穎的原子反射鏡,半束蘭失諧高斯光束可以被用來有效的法向速度大于1m s的入射原子。

Considering the influence of high evanescent modes , we have obtained the common theory . by the comparing between theoretical calculation and experimental data , we found the theory can accurately describe the high - frequency characteristic of this kind of slow - wave helical groove structure . then , five representative shapes are chosen and researched particularly ( triangle shape , cosine shape , trapezoid shape , rectangular shape and swallow - tailed shape ) 主要工作成果和創新之處在于: 1 .通過考慮高次模式的影響,獲得了一種更為精確分析任意槽形螺旋槽結構的普遍理論,經與實驗測量值比較,發現它更能準確可靠地描述此類螺旋慢波結構的高頻特性,然后詳細研究了五種槽形狀(三角形槽、余弦形槽、梯形槽、矩形槽和燕尾形槽)對螺旋槽慢波系統導波特性的影響。

However , the intensity gradient ( force ) of the diffracted light of the semi - gaussian beam is far smaller than that of the evanescent - light wave , so its spontaneous emission probability is greater than that from the evanescent - light one when the normal velo city of the incident atom is greater 然而,因為半束蘭失諧高斯光束衍射光場的強度梯度力遠小于消逝波光場,所以當入射原子速度較大時,原子在半束蘭失諧高斯光束衍射光場中的自發輻射幾率要大于消逝波光場。

The definition of dark hollow beam ( dhb ) and its generation are introduced in this thesis . at the same time , the principle , methods and experimental progress of atomic guiding in hollow optical fibers , blue - detuned evanescent wave and dark hollow beams are reviewed in some detail . finally , the basic definition of the angular momentums of all kinds of the hollow beams and their application are discussed 本文簡單介紹了中空光束的定義及其產生方法,同時綜述了采用中空光纖中紅失諧高斯模式、中空光纖中藍失諧消逝波和藍失諧暗中空光束實現原子導引的原理、方法和實驗及其最新進展,并對各類中空光束的角動量及其轉換和應用進行了詳細的介紹和討論。

We derive the intensity distribution of the evanescent light - wave in the rectangular hollow space of the four single - mode fibers , and calculate the optical potential for guided cold atoms . the other scheme is evanescent - wave atomic guiding by using three single - mode fibers , and calculate the intensity distribution of the evanescent light - wave in the triangular hollow space and the optical potential for guided cold atoms . our study shows that these schemes can be used to realize single - mode atomic wavdguide only when the input laser power is equal to a few mw 在本文中,我們采用了二種單模光纖束的方案:其一是利用四根單模光纖來實現原子波導的方案,我們導出了四根單模光纖束組成的類四邊形對稱中空區域中產生的消逝波光強分布,計算了該中空區域的冷原子光學囚禁勢;其二是利用三根單模光纖來實現原子波導的方案,計算了三根單模光纖束組成的類正三角形中空區域中的消逝波光強分布以及該中空區域的冷原子光學囚禁勢。

They also have been paid more attention and have very high value in the military field such as military medicine and biological toxicant detection , based on the study of the basic operating principle and structure of the evanescent wave - based optical fiber biosensors , an optical fiber biosensor with fiber bundle was developed . theoretical analysis and signal processing experiments were researched then 在研究了光纖倏逝波生物傳感器系統的基本工作原理和系統結構的基礎上,本文構建了一種基于光纖束的倏逝波生物傳感器系統,并在此基礎上展開了理論分析和信號處理實驗研究。

Choi wan , the violet blue open atrium , busy , spit 1 : 00 rhodopsin , slow rise gradually turned into a small arc , semicircle ; into color , the red ; then a jump slightly , with a hint of the things that is evanescent tail light , a round red inlay in the horizon 彩云下,空曠的紫藍色的天幕上,一剎間,吐出一點紫紅,緩慢上升,逐漸變成小弧、半圓;變成桔紅、金紅;然后微微一個跳躍,拖著一抹瞬息即逝的尾光,一輪圓圓的紅日嵌在天邊。

Upon the whole she felt gratified , even though such a limited and evanescent triumph should involve her daughter s reputation ; it might end in marriage yet , and in the warmth of her responsiveness to their admiration she invited her visitors to stay to tea 總的說來,她感覺到了滿足,即使這種短暫和有限的勝利會影響到她女兒的名聲但是她最終也許還是要嫁給他的,她看見她們羨慕她的女兒,心里頭高興,就熱情地請她們留下來吃茶。

Good things always seem to be especially evanescent , and the final day of the retreat soon arrived . looks of regret appeared on participants faces over the retreat s impending conclusion , but there was widespread anticipation of the bliss to be derived from the final meditation session ahead 歡樂的時光總是消逝得特別快,轉眼就到結禪日,同修們的臉上均流露出依依不舍的神情,也對僅馀的打坐時段充滿禪悅的期盼。

She was ladylike , too , after the manner of the feminine gentility of those days ; characterised by a certain state and dignity , rather than by the delicate , evanescent , and indescribable grace , which is now recognised as its indication 就那個時代女性舉止優雅的風范而論,她也屬貴婦之列她自有一種端莊的風韻,并不同子如今人們心目中的那種纖巧輕盈和不可言喻的優雅。

Some experiments have been carried out successfully using the evanescent waveguide by european scientists , thus , the rang of exploitation of waveguides has been extended widely 歐洲的一些科學家采用截止波導成功地完成了多起微波的超光速實驗,由此拓展了截止波導的應用范圍,在超光速研究中也具有重要的作用。

When the frequency is below than the cut - off frequency of the waveguide , the field intensity decays exponentially with distance along the waveguide and the wave is called evanescent wave 當頻率低于波導的截止頻率時,電磁波在波導中與距離成指數規律衰減,是一種消失波。

The evanescent wave - based optical fiber biosensor uses the evanescent wave which is produced when light propagates in the fiber probe to excite the fluorescence signal 光纖倏逝波生物傳感器系統中,利用激光在光纖探針中傳播時產生的倏逝波來激發熒光物質,產生熒光信號。

Finally , we propose two schemes to guide cold atoms in the beam of single - mode fibers . one is evanescent - wave atomic guiding by using four single - mode fibers 最后,提出了采用單模光纖束中間形成的消逝波來實現原子導引的新方案,并進行了相應的理論分析與研究。

It is shown that the coupling length for such a waveguide system can be shortened significantly by putting a lhm layer since the lhm can amplify evanescent waves 理論分析表明,由于負折射介質能放大倏失波,它可以有效地增強二波導間的藕合作用。