Around this same time, Cavalleri and others pointed out that carefully tailored light pulses could also be created that would couple to particular vibrational modes of crystals. That way, again on the picosecond timescale, one could imagine reaching into a crystal and distorting it transiently. The Max Planck group made use of this approach in a very deliberate way. There is a trend toward higher superconducting transition temperatures in the cuprate superconductors as particular bonds within the lattice are distorted due to the overall crystal structure. What these folks did was hit a cuprate, YBa2Cu3O6.5, with a pulse designed to transiently distort the bonds even more in the favorable-for-superconductivity direction. Again, they found an optical response that indicated, below Tc, strengthened superconductivity, and above Tc, optical signatures similar to that of superconductivity all the way up to room temperature! Subsequent ultrafast x-ray diffraction measurements indicated that the lattice really was distorting as desired in those experiments.
The very recent attention has resulted from this paper, where this group has again optically driven some lattice modes, inducing signatures in the optical response that look very much like superconductivity well above Tc, this time in K3C60. Interestingly, in this case when the material is already superconducting, it doesn't seem like the optical pulse enhances the superconductivity.
All of this is very cool, though it's important to remember that these are transient effects, and on the timescales so far it is extremely difficult to perform any other measurements (e.g., non-optical ones, like magnetometry) that would independently test for superconductivity. Still, this is an impressive strategy, and beyond nonequilibrium physics it strongly suggests that greater control over material structure (than what we have so far been able to achieve) could pay enormous dividends.