Scattering in the ultrastrong regime: nonlinear optics with one photon.
Scattering in the ultrastrong regime: nonlinear optics with one photon.
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DOI：
10.1103/physrevlett.113.263604
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发表时间：
2014-06
影响因子：
8.6
通讯作者：
Eduardo S'anchez-Burillo;D. Zueco;J. Garc'ia-Ripoll;Luis Mart'in-Moreno
中科院分区：
文献类型：
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作者：
Eduardo S'anchez-Burillo;D. Zueco;J. Garc'ia-Ripoll;Luis Mart'in-Moreno
数值研究了与一维光子波导超强耦合的二能级系统对飞行光子的散射。光子介质被建模为一个阵列的耦合腔和整个系统进行了分析，超越了旋转波近似使用矩阵乘积状态。结果发现，散射的强烈影响，在系统中存在的单光子和多光子缀饰束缚态。在超强耦合机制中，出现了一个新的非弹性散射通道，入射光子将能量沉积到量子位中，激发光子束缚态，并以较低的频率逃逸。这种单光子非线性频率转换过程可以达到高达50%的效率。其他显着的特点，在散射引起的反向旋转条款是蓝移的反射共振和Fano共振，由于长寿命的激发态。
The scattering of a flying photon by a two-level system ultrastrongly coupled to a one-dimensional photonic waveguide is studied numerically. The photonic medium is modeled as an array of coupled cavities and the whole system is analyzed beyond the rotating wave approximation using matrix product states. It is found that the scattering is strongly influenced by the single- and multiphoton dressed bound states present in the system. In the ultrastrong coupling regime a new channel for inelastic scattering appears, where an incident photon deposits energy into the qubit, exciting a photon-bound state, and escaping with a lower frequency. This single-photon nonlinear frequency conversion process can reach up to 50% efficiency. Other remarkable features in the scattering induced by counterrotating terms are a blueshift of the reflection resonance and a Fano resonance due to long-lived excited states.