查询词典 gallery

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。

The whispering gallery modes from Rhodamine B doped sol gel microdisks under 532 nm pulsed laser pumping was studied. Microdisks of 15 μm～20 μm in diameter were fabricated by photolithography of light polymeriable sol gel thin films.

采用光聚合溶胶凝胶材料，通过光刻制备得到直径在15 μm～20 μm间的光学微盘谐振腔，在掺有若丹明B染料时，用脉冲532 nm激光抽运微盘，观察到回廊耳语模式，实验所得峰位与理论值相符。

The picture, worth about two million pounds (25 million yuan), was snatched from Manchester's Whitworth Gallery at the end of April, along with two other can-vases by Picasso and Gauguin .

这幅价值200万英镑(约2500万元人民币)的画于四月底在曼彻斯特的威特沃斯艺术馆被盗，同时被盗的还有毕加索与高更的两幅。

Photo Gallery: Erosion and Weathering Wind erosion makes these layered sandstone hills swirl in Paria Canyon-Vermilion Cliffs Wilderness Area.

意译：侵蚀和风化的图片画廊。风蚀使这些层状的砂岩丘陵漩涡中帕里亚峡谷，朱红色悬崖荒野地区。

It does look a lot more workmanlike than some of the engines in this gallery; however it seems to have been no more successful.

看起来的确有很多更workmanlike比一些引擎，在这画廊，但它似乎已没有更大的成功。

Photo Gallery: Ocean Wildlife A Napoleon wrasse patrols the waters off the coast of Palau in Micronesia.

一条拿破仑濑鱼巡逻，远离水域附近的海岸上的珀劳群岛在密克罗尼西亚。

When I was in New York, I went to gallery sometimes. I also like Yayoi Kusama's works very much.

在纽约的时候有时候会去看看画廊，我也非常喜欢草间弥生的作品。

ZUNi Leonardo da Vinci s cartoon of the Virgin Mary and Saint Anne hangs in the British National Gallery .!

芬奇的圣母马丽亚和圣安妮画像的草图现存于英国国家美术馆。

The stern gallery is accessibly only through the Captain's salon.

船尾是通俗易懂仅通船长沙龙的画廊。

I am sure that her gallery will be a ture taproom as Mandolin instead of an amphibolous faker with kinds of flashy names.

我相信她将要经营的画廊会如同她的&曼陀铃&，是纯正的酒吧，而不是时下各种名目浮华的&夜店&。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。