Xueming's paper on a stretchable Fresnel zone plate composed of CNT grown on PDMS, in which I performed the simulation and optical measurement, is published on Scientific Reports:
http://www.nature.com/articles/srep25348
Achieving circularly symmetric stretching is rather difficult task, which results in strong astigmatism aberrations after stretching. But it is a very good idea. If we could have found an ideal circular stretching mechanism, it will be much better, #the power of mechanical engineering:).
May 13, 2016
New publication on focal field shaping of vector vortex beams
Our publication "Shaping the focal field of radially/azimuthally polarized phase vortex with Zernike polynomials" is published recently on Journal of Optics.:
http://iopscience.iop.org/article/10.1088/2040-8978/18/6/065608
http://iopscience.iop.org/article/10.1088/2040-8978/18/6/065608