three-photon 中文意思是什麼
three-photon
解釋
三光子-
We call the new quantum phenomenon that ca n ' t be explained by classical theory non - classical feature of cavity field. it has been proved by experiment, that quantum states of cavity field can exhibit three non - classical features, i. e. photon antibunching effect, sub - poissonian statistics distribution, and squeezed states
在光場與原子相互作用的過程中會出現某些不能為經典理論所解釋的新的量子現象，人們統稱這些現象為光場的非經典效應，目前實驗上所觀測到的非經典現象有光子的反聚束效應、亞泊松分佈和光場的壓縮效應。 -
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 -
Due to its supper - resolution imaging ability and its unique three - dimensional microfabrication ability. it has been widely used in life science, 3d - optical data storage, and lithographic microfabrication. the imaging principles of confocal microscopy have been discussed extensively by many authors, but all of those theories did n ' t account for the nonlinear effect of two - photon excitation
近十多年來，其理論研究和應用研究都取得很大進展，特別是雙光子共焦顯微鏡，由於具有極高的空間解析度和特有的三維處理能力，因而在生物醫學研究、三維高密度存儲以及三維微細加工等領域具有變革性的應用潛力，取得了許多突破性進展，已成為光學及其交叉學科中最誘人、最活躍的研究領域之一。 -
Abstract : by employing the concept of photon flux, the evolution of the phase and photon flux in the eigenmode state in three - wave mixing, and the requirements for the initial phase and photon flux in this state, are studied in the paper. a special state in which there are only exchanges of the photon flux but no phase variations in the three - wave mixing process is investigated. an all - optical switch based on the eigenmode pushpull nonlinear - optical - mirror is presented, and the properties of this all - optical switch are numerically calculated. the numerical results show that the performance stability is extremely good, and the intensity and phase of the output signal beams can be easily realized and controlled
文摘:利用光子流概念研究了三波混頻中本徵模狀態的相位和光子流的變化，以及該狀態對光波的初始相位和初始光子流的要求，研究了三波混頻中只有光子流的交換卻沒有相位變化的特殊狀態，提出了本徵模狀態推拉式非線性光環鏡的全光開關，並數值計算了這種全光開關的性能，數值結果表明，該光開關的性能穩定性好，並且易於實現和控制輸出信號光的光強及相位 -
Secondly, the third order nonlinear optical properties of these compounds are studied under the excitation of ps pulsed laser with the wavelength of 1064nm using z - scan technique, nonlinear refractive indices and nonlinear absorption coefficients are calculated according to the z - scan experiment curves of the compounds. all the three compounds have self defocusing characters and two photon absorptions. lastly, nonlinear refraction and absorption properties of these compounds are studied by z - scan technique under the excitation of ps pulsed laser with the wavelength of 532nm the self defocusing and reverse saturation absorption are found in these compounds
根據實驗曲線計算了它們在1064nm下的三階非線性折射率和非線性吸收系數，三種化合物都具有自聚焦特性，並且在該波長下，三種化合物均具有雙光子吸收，最後，以皮秒脈沖的532nm為激發波長，採用z掃描方法，研究了三種金屬有機化合物的非線性折射和非線性吸收性質，在該波長下三種化合物仍然表現為自聚焦特性，且其吸收為反飽和吸收。 -
The equations which are used in the radiation hydrodynamic model include the hydrodynamic equation of plasma, the absorption equation of laser, non - lte electron occupation probability equations, electron ion and photon energy equations ( three - temperature equations ), and the state equation of matter and so on
考慮的方程有：等離子體流體力學方程組，激光吸收方程，非局域熱動平衡電離下電子占據概率的速率方程組，電子離子的能量守恆方程組和光子的能量輸運方程（三溫方程組） ，關于元素不透明度的方程，以及描述物質狀態的方程等。 -
Effect of one - photon detuning on light speed reduction in a three - level - type atomic system
三能級原子系統中單光子頻率失諧對光減速的影響 -
The analyses given in this paper to quasi - three - level for 946 nm laser are complete. the relation between 946 nm laser transmission and optimal crystal length has been derived from the rate equations describing the population inversion and the photon density in the laser cavity in the steady - state case. the minimal claims to coating have been given on the base of contrasting 946 nm transmission with 1064 nm transmission in the condition of different cavity losses and how the pump beam radius in the laser crystal and optimal crystal length affect the laser threshold and output power of 946 nm laser has been given as well
對產生946nm譜線的準三能級結構給出了較為完整的分析，利用激光諧振腔處于穩態時的速率方程，導出了準三能級nd ： yag946nm起振時，透射損耗與最佳激光晶體長度的關系，在與1064nm透射損耗相比較的基礎上，給出了不同的腔損耗情況下的最低鍍膜要求，並且給出了激光閾值、輸出功率和最佳激光晶體長度及泵光光斑大小的關系，這為設計室溫下高效運轉的946nm激光器的提供了理論基礎，這種分析方法對研究此類低增益，準三能級或三能級激光系統輸出特性有借鑒意義。 -
Influence of the coupling between splitted levels on ionization in two - photon resonant three - photon ionization
雙光子共振三光子電離能級間耦合對電離的影響 -
One typical model for cpt is the a type three - level system when the life times of the ground levels are long enough and the coherent driven transitions are on the two - photon resonance
一類典型的系統是電偶極躍遷構成a型的系統，條件是兩低能級壽命很長， a型兩偶極躍遷發生雙光子共振。 -
The control system includes two modules, one named the input module which acquires data digitally, and the other, named the output module, controls the emission of the laser, the gating function of the single photon counting module ( spcm ) and the synchronization of the input and output modules. each of them uses a complex programmable logic device ( cpld ) as the core component, and is devided into three parts : the hardware circuit, the programming logic circuit and the software
該控制系統主要包括控制單光子發射、單光子探測器、數據採集接收系統的輸出系統和數據採集系統兩個模塊，它們都採用復雜可編程邏輯器件cpld作為核心功能晶元，由硬體電路設計、晶元編程和高級軟體編程三部分組成。 -
Linear entropies of a cascade three - level atom interacting with one - mode photon field
單模光場與級聯三能級原子相互作用系統中熵的時間演化 -
We also performed a nonlinear curve fitting to the intensity relation curve between pumped light and upconversion emission light, and knew that the upconversion luminescence belonged to three - photon absorption
通過對上轉換發光強度與泵浦源電流強度關系曲線的擬合，看到這種上轉換是三光子吸收過程，這與通過能級圖分析得到的結果相同。 -
In this paper, the author will firstly introduce the meanings of the photometric units, photosynthetically active radiation and photosynthetic photon flux, then theoretically derive the relations of the three units above, and finally utilize the full range of spectral characteristics of three different lamp to illustrate the process of conversion
該文在介紹人眼光度學、促進光合作用輻射功率和光合作用光子流量的基礎上，主要從原理上推導出三個單位之間的轉換關系，最後用三種光源具體舉例計算。 -
Furthermore, the upconvesion luminescence < wp = 8 > about 650nm and 808nm is also reached. they respectively belonged to three - photon and two - photon absorption
另外，也對650nm波長和808nm波長的上轉換發光進行了研究，證明它們分別是三光子吸收和兩光子吸收過程。 -
Numerical simulation of signal intensity distribution in a two - photon three - dimensional storage system
雙光子光存儲掃描信號強度分佈的計算機模擬 -
It was populated via a three - photon process of two mechanisms presented by us
2h9 / 2能態的布局有兩種機理，均是三光子過程。 -
Three temperature equations include disconnected thermal conductivity coefficient and energy exchange terms between electron and ion, electron and photon, which are affected by the density an d temperature of the plasma, and by the atom parameter. implicit scheme have to be used to solve them. we use entirety linear iteration method to do this work
三溫方程含有間斷的熱傳導系數，存在著電子與光子、電子與離子的能量交換，這些量與離子的密度、溫度和原子物理參數有關，對它們的求解必須採用隱式格式，我們採用整體線性化迭代格式迭代求解。 -
Materials with strong two - photon absorption ( tpa ) are currently attracting considerable attention in the chemistry, photonics and biology communities because of their potential applications in optical power limiting, upconverted lasering, three - dimensional datastorage, nondestructiveimaging and photodynamic therapy
強雙光子吸收材料由於在激光限幅、雙光子上轉換激射、三維信息存儲、生物體三維成像、光動力學治癌等方面具有誘人的應用前景，成為材料化學、光子學、生物學等領域的關注熱點。 -
In a three - level a system, the condition of establishing eit is the exact two - photon resonance
在三能級a型介質中，產生eit的條件是雙光子共振。
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