photonic bandgap 中文意思是什麼

photonic bandgap 解釋
光子能隙
  1. Photonic bandgap properties of photonic crystals with a complicated periodic structure

    復周期結構光子晶體的光子能帶特性研究
  2. In the reflected wave, the reflectivity of forbidden band lowers quickly with the extinction coefficient increment, when the extinction coefficient increases to 0. 05, there is already no obvious photonic bandgap

    得出：在反射波中，禁帶的反射率隨消光系數的增加而迅速降低，當消光系數增加到0 . 05時，已經不存在明顯的能帶。
  3. A pmc structure with a complete photonic bandgap has been designed

    設計出了具有完全光子禁帶的pmc結構。
  4. The radiation pattern of the antenna is more rotationally symmetric, and a more reduction on the sidelobe levels of the antenna is achieved as compared to the antenna with the corrugated soft surface. in conclusion, in the present thesis both theoretical and experimental research works have been carried out intensively on patch antennas based on photonic - bandgap structures. it is shown that our photonic bandgap structures can greatly improve the performance of the patch antennas

    該平面圓環結構軟表面天線是在空氣介質的皺褶圓環結構軟表面天線的基礎上改進得到，為了便於比較，我們首先研究了空氣介質的皺褶圓環結構軟表面天線，用fdtd方法並結合pml吸收邊界條件對該天線的性能進行了研究，結果表明天線的帶寬增加，天線的軸對稱性得到了很大改善， e面和h面方向圖的波束幾乎重合，天線的旁瓣和背瓣受到很大的抑制。
  5. The dual - core air - guided photonic bandgap fiber couplers are designed and decoupling phenomenon has been found. coupling properties of the pbgfs with two adjacent air holes as fiber cores are analyzed. the decoupling point, where there is no

    對具有兩個相鄰纖芯的空氣傳導光子帶隙光纖的傳導模式和耦合特性進行了理論分析，在所分析的結構中發現了無耦合點，在該波長處兩個相鄰纖芯之間不發生能量轉移。
  6. In the transmitted wave, along with the extinction coefficient increment, the width of photonic bandgap is a gradual extension, the edge of photonic bandgap is a gradual faintness, when the extinction coefficient increases to 0. 02, there is already no obvious photonic bandgap

    在透射波中，隨著消光系數的增加，禁帶寬度逐漸擴大，禁帶邊緣逐漸模糊，當消光系數增加到0 . 02時，已經不存在明顯的能帶。
  7. The details are described as follows : 1. the photonic bandgap theory based on total internal reflection ( tir ) pcfs filled with by high index material ( nlc ) is proposed for the first time. based on this theory, the effects of nlc - filled tir - pcfs on the transmission mechanism and propagation properties are studied using plane - wave method and full - vector fem

    主要研究內容和成果包括以下基本方面: 1 、首次提出基於填充高折射率介質（液晶）的折射率引導型pcf的光子帶隙理論分析方法，在此理論的指導下，採用平面波展開法和有限單元法研究了填充對光纖傳導機制和傳輸特性的影響，研究結果表明液晶填充可以實現光子晶體光纖導光機制的轉變。
  8. The research of patch antennas based on photonic - bandgap ( pbg ) structures is a relatively new area. the goal is to improve the performance of the patch antennas by using the special features of pbg structures. though some good research results have been obtained by scientists in the world, there still exit some problems to be solved for improving the performaces and reducing the size, weight and cost

    雖然國內外已經在基底鉆孔型、地面腐蝕型、高阻抗表面型、 uc - pbg型、覆層型和軟表面型電磁（光子）晶體貼片天線等方面開展了研究，但是在這些研究中還遺留著多方面的問題有待解決，以顯著改善天線的性能指標，減少天線的體積，重量，降低天線的加工費用等。
  9. A new photonic bandgap cover has been designed

    設計了一種新型的光子晶體覆層。
  10. Much effort has focused on eliminating these unwanted defects from the self - assembled material, and extremely ordered photonic bandgap crystals have been made. however people ca n ' t control the defect during the self - assembling

    在本方法的基礎上利用光鑷技術對產生的缺陷進行修復以及對生成的晶體進行修整，從而達到去除缺陷的目的，生成大面積無缺陷的的三維光子晶體。
  11. The simulation and test have been carried out for a metallic photonic bandgap ( mpbg ) reflector antenna, with an explicit method as well as a genetic algorithm

    採用一種快速的計算方法，並結合遺傳優化演算法，進行了金屬光子晶體（ mpbg ）反射面天線的模擬與實驗。
  12. The haronics at the output is terminated especially to the second harmonic, in order to improve the output power and efficiency. we present a new method for harmonic tuning by using photonic bandgap ( pbg structure at the output of the power combiner in this thesis

    我們在功率合成器的輸出端使用二維微帶pbg結構進行諧波調諧，用來提高合成器的輸出功率。最後，討論了功率合成中幅度、相位對合成效率的影響及系統的「適度惡化」現象。
  13. The bandgap properties of one dimension heterostructure photonic crystal

    異質結構光子晶體的能帶特性研究
  14. Analysis of photonic bandgap microstrip structure using fdtd method

    方法分析光子帶隙微帶結構
  15. We study the photonicband structure of the mof cladding with triangular and honeycomb air holes lattices. then the guided mechanisms of mofs are demonstrated. the guided properties such as waveguide dispersion, effective modal area and nonlinearity for both index - guided mof and photonic bandgap mof are presented

    從研究微結構光纖的傳導機制和傳導模式出發，分析不同結構的光子晶體包層的能帶結構，研究折射率傳導和光子帶隙傳導兩種機制下光纖的傳導模式及色散、損耗和有效模場面積等基本特性。
  16. Modulation of photonic bandgap and localized states by dielectric constant contrast and filling factor in photonic crystals

    介電常數對比和填充率對光子晶體中光子禁帶和局域態的調節
  17. Leading into the complex refractive index and making use of the characteristic matrix method, the photonic bandgap of photonic crystal with the variety of the absorb is studied

    摘要引入復折射率並利用特徵矩陣法，研究了光子晶體的吸收對光子晶體能帶的影響。
  18. Periodic dielectric structure. they can create a range of forbidden frequencies called photonic bandgap. photons with energy lying in the gap cannot propagate through the medium

    它是介質顆粒周期排列而成的人工材料，能夠產生光子帶隙，頻率落在帶隙內的光在晶體里沿任何方向都不能傳播。
  19. We modify the defect by applications of optical tweezers technology. structural defects can dictate the properties of photonic bandgap materials, adding intentional defects within the crystal are needed

    在實際的應用中，缺陷的結構決定了光子帶隙材料的性質，這就需要人為的製造出具有特殊用途的缺陷。
  20. Based on the simulation method of finite difference time domain ( fdtd ) ( together with the boundary treatment of an anisotropic perfect matched layer of absorbing media for the truncation of fdtd lattices ) and the theory of ordinary antennas, antennas based on photonic bandgap ( pbg ) materials and meta - materials are studied in the present dissertation

    在開展有限時域差分法（結合各向異性完全匹配層邊界）演算法研究和普通天線模擬設計研究的工作基礎上，本論文主要進行了基於光子晶體（ pbg ）與異向介質的新型天線的研究。
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