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destructive interference 【物理學】相消干涉。

destructive range

When a collimated - well gaussian laser beam passes through a 27i - phase plate and then focused by a lens , a focused hollow beam ( fhb ) will be generated behind the lens , as a result of the completely ( r = 0 ) and partially ( r 0 ) destructive interference effects around the central region of the beam 當一束準直的高斯光束通過具有2位相分布的位相片和一個薄透鏡時,這將導致在入射高斯光束中心的完全和部分相消干涉效應,于是在透鏡后就會形成一束聚焦中空光束( fhb ) 。

In this paper we have done two work , one is we , in the dressed states representation , reveal that the constructive interference of atomic coherence on absorption leads to electromagnetically induced absorption , which is in sharp contrast to the case in which destructive interference of atomic coherence gives rise to electromagnetically induced transparency and the other is we reveal that coupling field linewidth inhibits electromagnetically induced absorption , by employing a four - level system in which three transitions are in n configuration and the middle transition serves as a probe transition 本文主要做了兩方面的工作:一是在修飾態表象中揭示修飾態原子相干對吸收的相長干涉產生電磁誘導吸收,這與修飾態原子相干對吸收的相消干涉導致電磁誘導透明的情形形成鮮明的對照。二是在裸態中,引入耦合場的線寬,從而發現耦合場的線寬抑制電磁誘導吸收。首先研究電磁誘導吸收。

The one - half wavelength out of phase caused by the specimen itself enables this light to cause destructive interference with the direct light when both arrive at the intermediate image plane at the diaphragm of the eyepiece 這種由標本產生的半個波長的相位差的光線與直射光同時到達位于目鏡光欄的中間像面時會產生相消的干涉。

So we can say destructive interference of atomic coherence leads to electromagnetically induced absorption , constructive coherence of atomic coherence leads to electromagnetically induced transparency 因此,我們可以確切地說,原子相干對吸收的相長干涉產生電磁誘導吸收,原子相干對吸收的相消干涉導致電磁誘導透明。

We design several combined photonic crystals models based on the destructive interference theory , which can transfer completely the energy of a signal from one channel to another , or can realize light switching 本論文首次利用干涉相消的原理,設計了滿足一定條件的復合型光子晶體能量轉移模型和光子晶體光開關。

The fundamental principles underlying the concept of electronic beam steering are derived from electromagnetic radiation theory employing constructive and destructive interference 電子波束控制的基本原理來自于電磁場理論的相干作用。