Controlling photons with phonons: optomechanically induced non-reciprocity

• 来源期刊: 国家科学评论（英文版）
• 关键词: magnetic fields information processing propagation direction reciprocity theorem magnetic materials optical elements Faraday effect
• 年，卷（期）: 2017,（1）
• 页码范围: 3
• 页数: 1页
• 语种: 英文
• DOI: 10.1093/nsr/nww074

摘要

An outstanding challenge in the development of integrated optical circuits for classical and quantum information processing is the implementation of on-chip optical isolators and non-reciprocal elements,which filter or route photons depending on their propagation direction.In the absence of magnetic fields,the Lorentz reciprocity theorem prevents one from realizing such devices with purely linear dielectrics [1].That is why most conventional optical isolators and circulators make use of magneto-optical properties,like the Faraday effect,to achieve a directional transmission or absorption of light.However,this approach requires large magnetic fields and highly magnetic materials,which are both difficult to integrate on a small scale [2].Over the past years,there has been an intensive search for alternative,magnetic fieldfree schemes for realizing similar optical elements.