**Acknowledgements**

In **Figure 16**, we see the results for a data page stored in PVA/AA using p-HTM scheme. Beam intensity ratio is about 1:800, where the intensity incident onto the recording material is 3.16

**Figure 15.** Experimental results for BIM scheme and PVA/AA. (a) Data page; (b) histograms.

**Figure 14.** Experimental results for p-HTM scheme and no material. (a) Data page; (b) histograms.

time of 10 s. As we can see, and due to the lost of contrast, the results are a worse that in BIM case. There are 229 errors detected, that is, BER = 5.6 × 10−2. BER is still in an acceptable range,

We did some simulations to predict the results [23]. Our simulations predicted worse results for p-HTM, when we compare it with BIM, than the ones obtained experimentally. We believe that the better experimental ratio is due to the reduction in DC term, which is to not have into account in our simulations just because we considered a linear material. Further experimental

, respectively, for the reference and object beam, and for an exposure

mW/cm2

and 4 μW/cm2

150 Holographic Materials and Optical Systems

and it is only five times larger than the BIM case.

We want to acknowledge the financial support from the Spanish Ministerio de Trabajo y Competitividad under projects FIS2014-56100-C2-1-P and FIS2015-66570-P and by the Generalitat Valenciana of Spain under projects PROMETEOII/2015/015 and ISIC/2012/013 and by the University of Alicante with the project GRE12-14.
