Maxwell equations in distributional sense and applications, (with A. Sabra), preprint, 2023. Fine Properties of Monotone Maps arising in Optimal Transport for non quadratic costs, (with A. Montanari), preprint, 2022. L-infinity Estimates in Optimal Transport for non quadratic costs, (with A. Montanari), Calculus of Variations and Partial Differential Equations, 61(5), October 2022. Metasurfaces and Optimal Transport, (with Qingbo Huang, Quentin Merigot, and Boris Thibert), The SMAI Journal of computational mathematics, Volume 8 (2022), pp. 201-224. Sobolev inequalities with jointly concave weights on convex cones, (with Z. Balogh and A. Kristaly), Proceedings London Mathematical Society, 122(4), pp.537-568, April 2021. Chromatic Aberration in Metalenses, (with A. Sabra), Advances in Applied Mathematics, Vol. 124, March 2021. On the Numerical Solution of the Near Field Refractor Problem, (with H. Mawi), Applied Mathematics and Optimization, 84 (Suppl 2), pp. 1877-1902, December 2021. C 1 alpha-estimates for the near field refractor, (with F. Tournier), Annales de l’Institut Henri Poincare C, Analyse non-lineaire, Vol. 38(3), pp. 577-600, May-June 2021. Refractors in anisotropic media associated with norms, (with Qingbo Huang and H. Mawi), Nonlinear Analysis, Vol. 188, pp. 125-141, April 2019. On the existence of dichromatic single element lenses, (with A. Sabra), Contemporary Mathematics, AMS, Vol. 748, 60 pp., April 2020. Reflection and refraction problems for metasurfaces related to Monge-Ampère equations, (with Luca Pallucchini), Journal of the Optical Society of America A, Vol. 35, No. 9, 1523-1531, September 2018. Tunable Graphene Metasurface Reflectarray for Cloaking, Illusion, and Focusing, (Sudipta Romen Biswas, Cristian E. Gutierrez, Andrei Nemilentsau, In-Ho Lee, Sang-Hyun Oh, Phaedon Avouris, and Tony Low), Physical Review Applied 9, 034021 (2018). Freeform Lens Design for Scattering Data With General Radiant Fields, (with A. Sabra), Archive for Rational Mechanics and Analysis, Vol. 228, Issue 2, pp. 341-399, 2018. Harnack’s inequality for a class of non-divergent equations in the Heisenberg group, (with F. Abedin and G. Tralli), Communications in PDEs, Vol. 42, Issue 10, 1644-1658, 2017. General refraction problems with phase discontinuities on nonflat metasurfaces, (with L. Pallucchini and E. Stachura), Journal of the Optical Society of America A, Vol. 34, No. 7, pp. 1160-1162, July 2017. An Iterative Method For Generated Jacobian Equations, (with F. Abedin), Calculus of variations and pdes, vol. 56, 101 (2017). Form-Invariance of Maxwell Equations in Integral Form, Harmonic Analysis, Partial Differential Equations and Applications In Honor of Richard L. Wheeden, pp. 69-78, Birkhauser, 2017. C1-alpha estimates for the parallel refractor, (with F. Abedin and G. Tralli), Nonlinear Analysis, vol. 142, September 2016, pp. 1-25. On the Numerical Solution of the Far Field Refractor Problem, (with R. De Leo and H. Mawi), Nonlinear Analysis, Vol. 157, July 2017, pp. 123-145. Aspherical lens design and imaging, (with A. Sabra), SIAM Journal on Imaging Sciences, Vol. 9, No.1, pp. 386-411, 2016. Uniform refraction in negative refractive index materials, (with E. Stachura), Journal Optical Society of America A, 32(11), 2110-2122 (2015). Refraction problems in geometric optics, Lecture Notes in Mathematics Volume 2087, Springer, 2014, pp 95-150. Local near field refractors and reflectors, (with F. Tournier) Nonlinear Analysis: Theory, Methods & Applications, Volume 108, October 2014, Pages 302-311. Design of pairs of reflectors, (with A. Sabra) Journal Optical Society of America A, Vol. 31, Issue 4, pp. 891-899 (2014). Aspherical Lens Design, Journal Optical Society of America A, Vol. 30, Issue 9, pp. 1719-1726 (2013). The Reflector Problem and the Inverse Square Law, (with A. Sabra), Nonlinear Analysis: Theory, Methods & Applications, vol. 96 (2014) 109-133. Regularity for the near field parallel refractor and reflector problems, (with F. Tournier), Calculus of Variations and PDEs, September 2015, Volume 54, Issue 1, pp 917-949. Interior second derivative estimates for solutions to the linearized Monge–Ampère equation, (with T. Nguyen) Trans. Amer. Math. Soc. 367 (7), 2015, 4537-4568. The refractor problem with energy loss, (with H. Mawi), Nonlinear Analysis: Theory, Methods & Applications, vol. 82, pp. 12-46, 2013. The near field refractor, (with Q. Huang), Annales de L’Institut Henri Poincaré (C) Analyse Non Linéaire, vol. 31 (4), pp. 655-684, 2014. Nonsmooth hypersurfaces with smooth Levi curvature, (with E. Lanconelli and A. Montanari), Nonlinear Analysis: Theory, Methods & Applications, Vol. 76, January 2013, Pages 115-121 . The Parallel Refractor, (with F. Tournier) Developments in Mathematics, Vol. 28, pp. 325-334 (2013). Harnack inequality for a degenerate elliptic equation, (with F. Tournier) Communications in PDE, Vol. 36, Issue 12, pp. 2103-2116 (2011). Interior gradient estimates for solutions to the linearized Monge–Ampère equation, (with T. Nguyen) Advances in Mathematics, Vol. 228, Issue 4, pp. 2034-2070 (2011). Surfaces reflecting and refracting collimated beams, (with F. Tournier) Journal Optical Society of America A, Vol. 28, Issue 9, pp.1860-1863 (2011). Reflection, refraction, and the Legendre Transform, Journal Optical Society of America A, Vol. 28, Issue 2, pp.284-289 (2011). An Aleksandrov type estimate for alpha convex functions, (with F. Tournier), Proc. Amer. Math. Soc. 138 (2010), no. 6, 2001-2014. Schauder estimates for sub elliptic equations, (with E. Lanconelli), Journal of Evolution Equations 9 (2009), no. 4, 707-726. The refractor problem in reshaping light beams, (with Qingbo Huang), Archive for Rational Mechanics and Analysis, 2009, vol. 193, no. 2, pp. 423-443. The near field refractor, (with Q. 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On the second order derivatives of convex functions on the Heisenberg group, (with A. Montanari), Ann. Sc. Norm. Super. Pisa Cl. Sci. (5) 3 (2004), no. 2, 349–366. Maximum and comparison principles for convex functions on the Heisenberg group, (with A. Montanari), Comm. Partial Differential Equations, 2004, Vol. 29, Issue 9/10, 1305-1334. Homogenization of Quasilinear Parabolic Equations in Periodic Media, (with J. Garcia–Azorero, and I. Peral), Comm. Partial Differential Equations, 2003, Vol. 28, Issue 11/12, 1887-1910. Maximum principle, Harnack inequality, and Liouville theorems for X–elliptic operators, (with E. Lanconelli), Comm. Partial Differential Equations, 2003, Vol. 28, Issue 11/12, 1833-1862. Regularity of weak solutions to the Monge-Ampère equation, (with D. Hartenstine), Trans. Amer. Math. Soc. 355 (2003) 2477-2500. W2-p-estimates for the parabolic Monge-Ampère equation, (with Q. Huang), Arch. Ration. Mech. Anal. 159 (2001), no. 2, 137–177. A Harmonic Analysis theorem and applications to Homogenization, (with I. Peral), Indiana Univ. Math. J. 50 (2001), no. 4, 1651–1674. Riesz Transforms, g-functions, and multipliers for the Laguerre semigroup, (with A. Incognito and J. L. Torrea), Houston J. Math. 27 (2001), no. 3, 579–592. Geometric Properties of the Sections of Solutions to the Monge-Ampère Equation, (with Q. Huang), Transactions of the A. M. S. 352 (2000), no. 9, 4381–4396. A generalization of a theorem by Calabi to the parabolic Monge-Ampère equation, (with Q. Huang), Indiana Univ. Math. Journal 47 (1998), no. 4, 1459–1480. Properties of the Solutions of the Linearized Monge-Ampère Equation, (with L. A. Caffarelli), American J. of Math., vol. 119(2), 1997, 423-465. Singular Integrals Related to the Monge-Ampère Equation, (with L. A. Caffarelli), in “Wavelet Theory and Harmonic Analysis in Applied Sciences,” edited by C. E. D’Attellis and E. M. Fernández-Berdaguer; Birkhauser, 1997, pages 3-13. 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