doc: add tensorflow citation

Author: ldes89150

paper.bib

@@ -280,4 +280,15 @@ @article{motlakunta2024
 issn={2041-1723},
 doi={10.1038/s41467-024-50864-2},
 url={https://doi.org/10.1038/s41467-024-50864-2}
+}
+
+@software{tensorflow_developers_2024_13989084,
+  author       = {TensorFlow Developers},
+  title        = {TensorFlow},
+  month        = oct,
+  year         = 2024,
+  publisher    = {Zenodo},
+  version      = {v2.18.0},
+  doi          = {10.5281/zenodo.13989084},
+  url          = {https://doi.org/10.5281/zenodo.13989084}
 }

paper.md

@@ -36,7 +36,7 @@ Holographic beam shaping using spatial light modulators (SLMs) as a reprogrammab
 
 The package implements the hologram generation algorithms of the Lee hologram [@lee1978iii] and its improved alternatives [@zupancic2016ultra;@shih2021reprogrammable], specifically targeting the digital micromirror device (DMD) based SLM with binary amplitude controls. It also implements the Gerchberg-Saxton algorithm [@gerhberg1972practical] and its improved alternatives[@gaunt2012robust;@pasienski2008high] suitable for liquid crystal on silicon (LCoS) based SLMs with pure phase controls.
 
-At its core, the package uses `TensorFlow` for numerical computations. By leveraging `TensorFlow`, the package harnesses the power of GPUs for faster computation without the need for code modification. This results in a significant speed-up for algorithms that are computationally expensive but benefit from parallelization, such as many hologram generation algorithms relying on iterative Fourier transformations.
+At its core, the package uses `TensorFlow`[@tensorflow_developers_2024_13989084] for numerical computations. By leveraging `TensorFlow`, the package harnesses the power of GPUs for faster computation without the need for code modification. This results in a significant speed-up for algorithms that are computationally expensive but benefit from parallelization, such as many hologram generation algorithms relying on iterative Fourier transformations.
 
 In addition to hologram generation, the package provides functions to simulate beam profiles created by holograms, aiding users in evaluating algorithm performance. It also includes a variety of pre-defined optical profiles, such as Hermite-Gaussian, Laguerre-Gaussian, super-Gaussian, and Zernike polynomials, enabling users to construct target beam profiles with ease.