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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Collimated unidirectional laser beams from notched elliptical resonators
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Collimated unidirectional laser beams from notched elliptical resonators

机译：切口椭圆形谐振器的准直单向激光束

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The whispering gallery is located in the dome of St Paul's Cathedral in London. If two people stand on opposite sides of the gallery and one of them whispers into the wall, the other can hear his or her words. The reason for this strange effect is that sound bounces along the wall as a surface wave with low loss, and so can be heard far away. This phenomenon, known as whispering gallery mode (WGM), was discovered by Lord Rayleigh in the 18th century. It has found new notoriety in the past few decades in the optics domain: ultra-high Q-factor, i.e., ultralow loss, optical resonators, based on WGMs have been demonstrated, opening up exciting new research frontiers in low-power nonlinear optics, optomechanics, optical processing, and sensing (1, 2). In PNAS, Wang et al. manage to demonstrate what eluded researchers for many years: a semiconductor microlaser emitting a unidirectional low-divergence beam based on optical WGMs (3).
机译：耳语的画廊位于伦敦圣保罗大教堂的圆顶中。如果两个人站在画廊的对面，而其中一个人在墙上窃窃私语，则另一个人可以听到他或她的话。产生这种奇怪效果的原因是，声音以低损耗的面波形式沿着墙壁反弹，因此可以在很远的地方听到。这种现象被称为耳语画廊模式（WGM），是瑞利勋爵在18世纪发现的。在过去的几十年中，它在光学领域发现了新的臭名昭著：已经证明了基于WGM的超高Q因子（即超低损耗）光学谐振器，开辟了低功率非线性光学领域令人兴奋的新研究领域，光力学，光学处理和传感（1、2）。在PNAS中，Wang等人。设法证明了多年来研究人员难以捉摸的：基于光学WGM发射单向低发散光束的半导体微激光器（3）。

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