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arXiv 1302.2682physics.optics
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氮化硅微盘光机械谐振器的电磁感应透明和宽带波长转换

Electromagnetically induced transparency and wide-band wavelength conversion in silicon nitride microdisk optomechanical resonators

Yuxiang Liu, Marcelo Davanco, Vladimir Aksyuk, Kartik Srinivasan

摘要:

我们证明了光机械介导的电磁感应的透明度和波长转换的氮化硅(Si3N4)微盘谐振器。制造的器件支持品质因数(Q)为10^6的回音壁光学模式,以及Q=10^4和625 MHz的谐振频率的径向呼吸机械模式,使得系统处于分辨边带状态。将强光学控制场放置在光学模式的红(蓝)失谐边带上会产生与共振探测光束的相干干涉,从而为探测器引入透明(吸收)窗口。对于器件的多个光学模式观察到这一点,所有这些光学模式都耦合到相同的机械模式,并且由于Si3N4的大带隙,这些光学模式可以在波长上广泛分离。利用这些特性来演示频率跨度为69.4 THz的1300 nm和980 nm波段之间的光信号的频率上转换和下转换。

英文摘要:

We demonstrate optomechanically-mediated electromagnetically-induced transparency and wavelength conversion in silicon nitride (Si3N4) microdisk resonators. Fabricated devices support whispering gallery optical modes with a quality factor (Q) of 10^6, and radial breathing mechanical modes with a Q=10^4 and a resonance frequency of 625 MHz, so that the system is in the resolved sideband regime. Placing a strong optical control field on the red (blue) detuned sideband of the optical mode produces coherent interference with a resonant probe beam, inducing a transparency (absorption) window for the probe. This is observed for multiple optical modes of the device, all of which couple to the same mechanical mode, and which can be widely separated in wavelength due to the large bandgap of Si3N4. These properties are exploited to demonstrate frequency upconversion and downconversion of optical signals between the 1300 nm and 980 nm bands with a frequency span of 69.4 THz.

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