Richter Marten, Mukamel Shaul
Department of Chemistry, University of California Irvine, Irvine, California 92697-2025, USA.
Phys Rev A. 2010 Jul 19;28(1):138201-138207. doi: 10.1103/PhysRevA.82.013820.
We calculate the four-wave-mixing signal of excitons generated at k(4) = k(1) + k(2) - k(3) by two pulsed entangled photon pairs (k(1), k(2))and(k(3), k(4)), where all four modes are chronologically ordered. Entangled photons offer an unusual combination of bandwidths and temporal resolution not possible by classical beams. Contributions from different resonances can be selected by varying the parameters of the photon wave function. The signal scales linearly rather than quadratically with the laser field intensity, which allows performance of the measurements at low powers.
我们通过两对脉冲纠缠光子对（k(1)，k(2)）和（k(3)，k(4)）计算在k(4)=k(1)+k(2)-k(3)处产生的激子的四波混频信号，其中所有四个模式按时间顺序排列。纠缠光子提供了经典光束无法实现的带宽和时间分辨率的独特组合。通过改变光子波函数的参数可以选择不同共振的贡献。该信号与激光场强度呈线性而非二次方比例关系，这使得能够在低功率下进行测量。
