自发发射

词组短语

spontaneous emission

与自发发射相关的网络例句 [注：此内容来源于网络，仅供参考]

The phenomenon was first reported in 1896 by Henri Becquerel for a uranium salt, and it was soon found that all uranium compounds are radioactive due to the uranium's radioactivity.

放射性：某些类的物质自发发射辐射的特性。1896年贝克勒耳第一个报告在铀盐中发现了这一现象，不久发现由于铀有放射性，所以所有的铀化合物都是放射性的。

"Radioactivity: Property exhibited by certain types of matter of emit ting radiation spontaneously. The phenomenon was first reported in 1896 by Henri Becquerel for a uranium salt, and it was soon found that all uranium compounds are radioactive due to the uranium's radioactivity."

放射性：某些类的物质自发发射辐射的特性。1896年贝克勒耳第一个报告在铀盐中发现了这一现象，不久发现由于铀有放射性，所以所有的铀化合物都是放射性的。

Any of three processes of radioactive disintegration in which a beta particle is spontaneously emitted by an unstable atomic nucleus in order to dissipate excess energy.

某些不稳定原子核为耗散其过剩能量而自发发射一个β粒子的三种放射性衰变过程的统称。

Any of three processes of radioactive disintegration in which a beta particle is spontaneously emit ted by an unstable atomic nucleus in order to dissipate excess energy.

某些不稳定原子核为耗散其过剩能量而自发发射一个β粒子的三种放射性衰变过程的统称。

According to the experiment, the characteristics of the spontaneous emission spectra are analyzed.

结合实验，对激光器的自发发射谱的特性进行了研究。

It contributes to the noise figure of the EDFA which causes loss of signal-to-noise ratio.

放大的自发发射可以对引起信噪比损耗的EDFA噪声指数产生影响。

Spontaneous emission can be modified through controlling the Rabi frequency of the driving field.

通过改变驱动场的拉比频率可以达到控制原子自发发射的目的。

We have studied the properties of spontaneous emission from a three level atom embedded in a photonic crystal.

研究了三维光子晶体中三能级原子自发发射的性质。

The spontaneous emission of a four-level atom embedded in a one-dimensional photonic crystal is investigated.

本文研究了处于各向同性的一维光子晶体中的单个四能级原子的自发发射性质。

In this dissertation, InGaAs/InGaAsP/InP MQW microdisk laser and its characterization were presented. Some conclusions are as following: the characteristics of lasing threshold was discussed by using rate equation. The dependent relations between threshold and cavity volume, spontaneous emission coupling efficiency β were investigated. The whispering gallery mode and spontaneous emission in a microdisk geometry were then studied. Almost all spontaneous emission was coupled into the lowest order TE mode when the normalized thickness of photonics well was between 0.15 and 0.5. The design principle and device process of InGaAs/InGaAsP/InP MQW microdisk laser were presented. The microdisk lasers with the diameter of 8μm, 4. 5μm and 2μm were succesfully fabricated by using etching techniques. The pulse lasing thresholds for the microdisk with the diameter of 8μm and 4. 5μm were 170μW and 15μW, a record results compared with the published in the literature. The cw lasing threshold for a 2-μm-diameter microdisk was only a few μW. We haven't found similar report up to now. To solve the problem of directional output in a microdisk laser, the power coupling efficiency in a double disk geometry was investigated with the theory of waveguide mode couple. A new structure of electrically pumped microdisk laser with output waveguide was designed, making a foundation for the practical use of microdisk laser.

本文主要研究InGaAs/InGaAsP/InP多量子阱半导体碟型激光器的研制和特性表征，并取得如下结果：利用速率方程理论讨论了激光器激射阈值的特性，分析了阈值与腔体积和自发发射耦合系数β之间的关系；讨论了微碟光子阱结构中的自发发射特性和微碟中WGM模式特性；光子阱结构在其归一化厚度在0.15-0.5之间时，几乎全部自发发射进入到最低阶TE模式中；研究了InGaAs/InGaAsP/InP多量子阱微碟激光器的结构设计原理和器件的制备工艺；利用刻蚀方法成功制备出直径分别为8μm、4.5μm、2μm的碟型微腔激光器；直径8μm和4.5μm的微碟脉冲光泵浦激射阈值分别为170μW、15μW，是目前所见文献报导中比较低的；直径2μm的微碟连续光泵浦激射阈值仅几μW，目前尚未见到达到类似结果的研究报导；为解决微碟激光器激射光定向引出的问题，通过波导耦合模理论分析了双层碟之间功率耦合效率；据此设计了新型带耦合输出波导的电泵浦微腔激光器，为进一步研制可实用的电泵浦微腔激光器打下基础。

与自发发射相关的网络解释 [注：此内容来源于网络，仅供参考]

Bloch：布洛赫

金属中的电子,周期势,布洛赫(bloch)波,带状结构,金属 vs.绝缘体vs.半导体. 含时微扰论. 跃迁几率,重温绝热理论,正旋扰动. 跃迁速率. 光的吸收和发射. 与非相干光相关的跃迁速率. 费米(Fermi)的黄金法则. 自发发射.

radioactive nuclide：放射性核素

核素(nuclide)是指有特定质量数、原子序数与核能态,并且其平均寿命长得足以被观测的一类原子的总称,用下列符号表示:放射性核素(radioactive nuclide)是一类不稳定的核素,能自发地转变为其他原子核或自发地发生核能态变化,同时伴有射线的发射,

phase：相位

就激光来说,原子发射光的一个重要概念是"相位"(phase). 各个原子的自发辐射的相位是各个独立、彼此无关的. 而受激发射的相位与激发发射的入射相位相关,各个原子受激发射光是同相的. 因此受激发射光不只是强度被放大了,

spontaneous disintegration：自发蜕变

spontaneous 自发的 | spontaneous disintegration 自发蜕变 | spontaneous emission 自发发射

spontaneous disintegration：自发衰变

spontaneous decay 自发衰变 | spontaneous disintegration 自发衰变 | spontaneous emission 自发发射

spontaneous emission：自发发射

spontaneous crack propagation 自发裂缝传播 | spontaneous emission 自发发射 | spout 瘤口

amplified spontaneous emission：放大的自发发射

放大、放大器 "amplification , amplifier" | 放大的自发发射 Amplified Spontaneous Emission | 放大的自发辐射噪声、ASE噪声 Amplified Spontaneous Emission noise

correlated spontaneous emission：关联自发发射

core nucleus 核芯[核] | correlated spontaneous emission 关联自发发射 | correlation exponent 关联指数

spontaneous emission coefficient：自发发射系数,自发射系数

spontaneous emission 自然放出 | spontaneous emission coefficient 自发发射系数,自发射系数 | spontaneous emission noise 自发射噪声