Efficient coupling to an optical resonator by exploiting time-reversal symmetry
Efficient coupling to an optical resonator by exploiting time-reversal symmetry
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DOI：
10.1088/1367-2630/15/12/123008
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发表时间：
2013-12-06
影响因子：
3.3
通讯作者：
Leuchs, G.
中科院分区：
文献类型：
--
作者：
Bader, M.;Heugel, S.;Leuchs, G.
在时间反演条件下，腔与外场的相互作用是对称的。因此，当入射光是自由腔衰减的时间反转版本时，即当它具有与腔寿命匹配的上升指数形状时，耦合到谐振器是最有效的。对于仅从一侧进入腔的光，可实现的最大耦合效率受到腔镜反射率的选择的限制。这样的空腔实验也可以作为单光子单原子吸收动力学的模型系统。我们目前的实验耦合指数上升脉冲的腔系统，允许高耦合效率。的上升指数的时间常数的影响进行了研究，以及一个有限的脉冲持续时间的效果。我们证明耦合94%的入射TEM 00模式到谐振器。
The interaction of a cavity with an external field is symmetric under time reversal. Thus, coupling to a resonator is most efficient when the incident light is the time reversed version of a free cavity decay, i.e. when it has a rising exponential shape matching the cavity lifetime. For light entering the cavity from only one side, the maximally achievable coupling efficiency is limited by the choice of the cavity mirrors' reflectivities. Such an empty-cavity experiment serves also as a model system for single-photon single-atom absorption dynamics. We present experiments coupling exponentially rising pulses to a cavity system which allows for high coupling efficiencies. The influence of the time constant of the rising exponential is investigated as well as the effect of a finite pulse duration. We demonstrate coupling 94% of the incident TEM00 mode into the resonator.