# Two-step enantio-selective optical switch Academic Article

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### abstract

• We present an optical enantio-selective switch'' that, in two steps, turns a (racemic'') mixture of left-handed and right-handed chiral molecules into the enantiomerically pure state of interest. The optical switch is composed of an enantio-discriminator'' and an enantio-converter'' acting in tandem. The method is robust, insensitive to decay processes, and does not require molecular preorientation. We demonstrate the method on the purification of a racemate of (transiently chiral) ${\mathrm{D}}_{2}{\mathrm{S}}_{2}$ molecules, performed on the nanosecond time scale.

### publication date

• January 1, 2003