真晶光帶 的英文怎麼說
中文拼音 [zhēnjīngguāngdài]
真晶光帶
英文
true crystallinity band-
Abstract : we have studied the spontaneous emission from a three - level atom with an external - driving field in a photonic crystal. as a result of quantum interference and photon localization, the population in the two upper levels displays quasi - oscillatory oroscillatory behavior. this depends on the initial atomic state and the relative positions of the two upper levels from the forbidden gap. the intensity and the phase of the external field can affect spontaneous emission from the atom. the properties are different from a three - level atom either in vacuum or in aphotonic crystal without an external driving field
文摘:討論了在雙光子驅動場作用下，三能級原子在光子晶體中的自發發射問題.由於量子干涉和光的局域化作用，兩個上能級中的占據數將具有周期振蕩或準周期振蕩的性質，這不僅依賴于兩個上能級與禁帶的相對位置，同時也依賴于原子的初始狀態，而且還與驅動場的強度、驅動場的入射位相有關.這些性質既與真空中帶有驅動場的原子的自發發射性質不同，也有別于無驅動場作用下光子晶體中三能級原子的自發發射性質Such control can be realized in case where a atom interact with photonic band gap matericals when the atom is placed in photonic crystals whose density of modes is dramatically different from that of free space vacuum. it was known that control could be achieved by varying the frequency ( which leads to the changes of the relative position of the upper levels from the forbidden gap ) or by varying the photonic density of modes ( dos ) or by varying the intial atomic state
由於光子晶體具有不同於真空中的光子態密度，原子和光子帶隙材料便發生相互作用，這樣便可以控制原子的自發輻射。改變原子上能級與光子禁帶邊緣的相對位置、材料中的光子態密度或原子初態都可以控制原子的自發輻射。Today, liquid crystal, a new functional material, has been applied more and more widely. on the side of display, owing to stable frarne, absolute environmental protecting, save electric energy and no tire for user, liquid crystal display keeps ahead among the range of display. with the developing of the technology of liquid crystsl, lcd will must substitute for crt and become the chief in market. in additin, liquid crystsl light filers which have been used in optic communicatins and light information handling, emply th e technical of combining the birefringence of liquid crystsl and fabry - petrot - type cavity. they manifest a series of merit, such as narrow band wide, deterioration low, wide tuning domain, simple structure and low cost, so liquid crystal light filter draw attention of many country
現在，液晶作為一種新型功能材料越來越得到廣泛的應用，在電子顯示裝置中，液晶顯示器以其畫面平穩、真正安全環保、省電和使用者不易疲勞等優點領先於顯示器的行列中。隨著液晶技術的發展，液晶顯示器將取代crt顯示器逐步成為未來市場的主流。此外，應用於光通信和光信息處理中的電調諧液晶濾光片，採用液晶材料的雙折射和電光效應與傳統f - p腔相結合，表現出窄帶寬、低損耗、調諧范圍寬、驅動電壓低、結構簡單、低成本等一系列優點，而日益受到各國研究部門的關注。After geometry optimization, their energy band structure, densities of states were calculated and analysised. we also calculated the model of doping cr, which can change the energy band structure of cdgeas2, the result is valuable for decreasing optical absorption. through the energy analysised, it was suggested that a germanium - on - arsenic anti - site defect was the most possible defect which may be associated with the 5. 5 micron absorption, the result of analysis are agreement with the research of epr, so the calculates are accurate
運用密度泛函理論計算，建立純砷化鍺鎘晶體的結構模型並對之進行結構優化，使理論模型更加接近真實結構，從而研究純砷化鍺鎘晶體的能帶結構和態密度、光學性質;分別建立砷空位模型（ vas - cdgeas2 ） ，鍺占砷位模型（ ge / as - cdgeas2 ） ，分別計算它們的能帶結構、態密度、光學性質。A modern stylish fashionable watch with a date featuring japanese seiko movement, stainless steel casing, studded with swarovski crystals, genuine leather strap, 50 meters water resistance and fluorescent hands. 2 - year guarantee and batteries included
精工設計時髦女莊手錶，裝有日本精工機件，不銹鋼表殼，鑲嵌施華洛世奇水晶，真皮表帶，耐50公?深水下壓力，夜光，保用二年期及附有電池。分享友人