Jorge ParraProfesor Ayudante Doctor en la Universitat de València · Fotónica · Electrónica

Investigación

Investigación

Fotónica integrada reconfigurable con materiales funcionales

Mi investigación se centra en dispositivos fotónicos de silicio mejorados con materiales funcionales. Estudio cómo conmutar, controlar y almacenar luz de forma eficiente, y cómo estos dispositivos pueden contribuir al procesamiento neuromórfico de la información.

Composición abstracta de trayectorias ópticas, interferencia y estados reconfigurables de materiales.

Líneas de investigación

Materiales funcionales para fotónica integrada

Plataformas híbridas de silicio y nitruro de silicio que incorporan dióxido de vanadio, óxidos conductores transparentes y materiales de cambio de fase para introducir funcionalidad óptica activa.

Dispositivos fotónicos reconfigurables y no volátiles

Conmutadores integrados, desfasadores, memorias fotónicas y dispositivos de control de polarización diseñados para un funcionamiento compacto, energéticamente eficiente y robusto.

Hardware fotónico neuromórfico

Funciones de activación no lineales integradas, dispositivos de generación de pulsos y memorias multinivel para el procesamiento óptico analógico inspirado en el cerebro.

Metodología: modelado de dispositivos, simulación electromagnética, optimización numérica y caracterización experimental.

Producción científica

Artículos en revistas

2026
  1. Y. Gutiérrez, D. Juan, F. Agresti, Í. López‐Mulet, J. Parra, M. G. Fernández‐Manteca, S. Vázquez‐Miranda, S. Espinoza, M. Losurdo, and P. Sanchis, “Characterization of Anisotropic Optical Behavior in Phase‐Change Material Sb2Se3,” Advanced Optical Materials, Art. no. e71583, 2026, doi: 10.1002/adom.71583.
  2. J. Caso, J. Parra, B. Rajeswaran, and P. Sanchis, “Low-loss hydrogen-doped indium oxide thermo-optic phase shifter for visible wavelengths,” Optics Express, vol. 34, no. 16, p. 29741, 2026, doi: 10.1364/OE.601898.
  3. J. Parra, J.-F. Morcillo, K. Schouteden, J. W. Seo, J.-P. Locquet, and P. Sanchis, “Broadband and ultra-compact all-optical nonlinear activation function enabled by VO2-integrated photonics,” Journal of Physics: Photonics, vol. 8, no. 2, Art. no. 025010, 2026, doi: 10.1088/2515-7647/ae6004.
2025
  1. J. Parra, J. Navarro-Arenas, and P. Sanchis, “Sub-milliwatt threshold power and tunable-bias all-optical nonlinear activation function using vanadium dioxide for wavelength-division multiplexing photonic neural networks,” Scientific Reports, vol. 15, no. 1, Art. no. 5608, 2025, doi: 10.1038/s41598-025-90350-3.
  2. J. Parra, “Polarization-Insensitive Silicon Grating Couplers via Subwavelength Metamaterials and Metaheuristic Optimization,” Photonics, vol. 12, no. 5, Art. no. 428, 2025, doi: 10.3390/photonics12050428.
  3. J. Navarro-Arenas, T. M. Howe, J. Parra, D. C. Koutsogeorgis, J. A. Hillier, N. Kalfagiannis, and P. Sanchis, “Local Tuning of the Epsilon-Near-Zero Condition in Hybrid Silicon Waveguides Using Reactive Laser Annealing,” Advanced Photonics Research, vol. 6, no. 6, Art. no. 2400140, 2025, doi: 10.1002/adpr.202400140.
2024
  1. J. J. Seoane, J. Parra, J. Navarro-Arenas, M. Recaman, K. Schouteden, J. P. Locquet, and P. Sanchis, “Ultra-high endurance silicon photonic memory using vanadium dioxide,” npj Nanophotonics, vol. 1, no. 1, Art. no. 37, 2024, doi: 10.1038/s44310-024-00038-1.
  2. J. Parra, J. Navarro-Arenas, and P. Sanchis, “Silicon thermo-optic phase shifters: a review of configurations and optimization strategies,” Advanced Photonics Nexus, vol. 3, no. 4, Art. no. 044001, 2024, doi: 10.1117/1.APN.3.4.044001.
  3. J. Parra, M. Kovylina, A. Griol, and P. Sanchis, “Nonvolatile reconfigurable polarization rotator at datacom wavelengths based on a Sb2Se3/Si waveguide,” Optics Express, vol. 32, no. 23, pp. 40581–40592, 2024, doi: 10.1364/OE.537225.
  4. J.-F. Morcillo, P. Sanchis, and J. Parra, “On-chip electro-optical spiking VO2/Si device with an inhibitory leaky integrate-and-fire response,” Optical Materials Express, vol. 14, no. 11, pp. 2681–2693, 2024, doi: 10.1364/OME.537717.
2023
  1. J. J. Seoane, J. Parra, J. Navarro-Arenas, and P. Sanchis, “Enhanced BaTiO3/Si3N4 integrated photonic platform with VO2 technology for large-scale neuromorphic computing [Invited],” Optical Materials Express, vol. 13, no. 11, pp. 3266–3276, 2023, doi: 10.1364/OME.501920.
  2. J. Navarro-Arenas, J. Parra, and P. Sanchis, “Complex-valued trainable activation function hardware using a TCO/silicon modulator,” Optical Materials Express, vol. 13, no. 10, pp. 2869–2881, 2023, doi: 10.1364/OME.497644.
  3. J. Navarro-Arenas, J. Parra, and P. Sanchis, “Comparative Performance Evaluation of Transparent Conducting Oxides With Different Mobilities for All-Optical Switching in Silicon,” IEEE Journal of Quantum Electronics, vol. 59, no. 3, pp. 1–7, 2023, doi: 10.1109/JQE.2023.3264774.
2022
  1. J. Parra, J. Navarro-Arenas, M. Kovylina, and P. Sanchis, “Impact of GST thickness on GST-loaded silicon waveguides for optimal optical switching,” Scientific Reports, vol. 12, no. 1, Art. no. 9774, 2022, doi: 10.1038/s41598-022-13848-0.
  2. J. Navarro-Arenas, J. Parra, and P. Sanchis, “Ultrafast all-optical phase switching enabled by epsilon-near-zero materials in silicon,” Optics Express, vol. 30, no. 9, pp. 14518–14529, 2022, doi: 10.1364/OE.454181.
  3. B. Chmielak, S. Suckow, J. Parra, V. C. Duarte, T. Mengual, M. A. Piqueras, A. L. Giesecke, M. C. Lemme, and P. Sanchis, “High-efficiency grating coupler for an ultralow-loss Si3N4-based platform,” Optics Letters, vol. 47, no. 10, pp. 2498–2501, 2022, doi: 10.1364/OL.455078.
2021
  1. J. Parra, W. H. P. Pernice, and P. Sanchis, “All-optical phase control in nanophotonic silicon waveguides with epsilon-near-zero nanoheaters,” Scientific Reports, vol. 11, no. 1, Art. no. 9474, 2021, doi: 10.1038/s41598-021-88865-6.
  2. J. Parra, I. Olivares, A. Brimont, and P. Sanchis, “Toward Nonvolatile Switching in Silicon Photonic Devices,” Laser & Photonics Reviews, vol. 15, no. 6, Art. no. 2000501, 2021, doi: 10.1002/lpor.202000501.
  3. J. Parra, J. Navarro-Arenas, M. Menghini, M. Recaman, J. Pierre-Locquet, and P. Sanchis, “Low-threshold power and tunable integrated optical limiter based on an ultracompact VO2/Si waveguide,” APL Photonics, vol. 6, no. 12, Art. no. 121301, 2021, doi: 10.1063/5.0071395.
  4. J. Parra, T. Ivanova, M. Menghini, P. Homm, J.-P. Locquet, and P. Sanchis, “All-Optical Hybrid VO2/Si Waveguide Absorption Switch at Telecommunication Wavelengths,” Journal of Lightwave Technology, vol. 39, no. 9, pp. 2888–2894, 2021, doi: 10.1109/JLT.2021.3054942.
  5. I. Olivares, J. Parra, and P. Sanchis, “Non-Volatile Photonic Memory Based on a SAHAS Configuration,” IEEE Photonics Journal, vol. 13, no. 2, pp. 1–8, 2021, doi: 10.1109/JPHOT.2021.3060144.
2020
  1. J. Parra, I. Olivares, F. Ramos, and P. Sanchis, “Ultra-compact non-volatile Mach–Zehnder switch enabled by a high-mobility transparent conducting oxide,” Optics Letters, vol. 45, no. 6, pp. 1503–1506, 2020, doi: 10.1364/OL.388363.
  2. J. Parra, J. Hurtado, A. Griol, and P. Sanchis, “Ultra-low loss hybrid ITO/Si thermo-optic phase shifter with optimized power consumption,” Optics Express, vol. 28, no. 7, pp. 9393–9404, 2020, doi: 10.1364/OE.386959.
  3. S. Cueff, J. John, Z. Zhang, J. Parra, J. Sun, R. Orobtchouk, S. Ramanathan, and P. Sanchis, “VO2 nanophotonics,” APL Photonics, vol. 5, no. 11, Art. no. 110901, 2020, doi: 10.1063/5.0028093.
2019
  1. J. Parra, I. Olivares, A. Brimont, and P. Sanchis, “Non-volatile epsilon-near-zero readout memory,” Optics Letters, vol. 44, no. 16, pp. 3932–3935, 2019, doi: 10.1364/OL.44.003932.
  2. I. Olivares, J. Parra, A. Brimont, and P. Sanchis, “Enhancing Pockels effect in strained silicon waveguides,” Optics Express, vol. 27, no. 19, pp. 26882–26892, 2019, doi: 10.1364/OE.27.026882.
2018
  1. L. D. Sánchez, I. Olivares, J. Parra, M. Menghini, P. Homm, J.-P. Locquet, and P. Sanchis, “Experimental demonstration of a tunable transverse electric pass polarizer based on hybrid VO2/silicon technology,” Optics Letters, vol. 43, no. 15, pp. 3650–3653, 2018, doi: 10.1364/OL.43.003650.
  2. I. Olivares, L. Sánchez, J. Parra, R. Larrea, A. Griol, M. Menghini, P. Homm, L.-W. Jang, B. van Bilzen, J. W. Seo, J.-P. Locquet, and P. Sanchis, “Optical switching in hybrid VO2/Si waveguides thermally triggered by lateral microheaters,” Optics Express, vol. 26, no. 10, pp. 12387–12395, 2018, doi: 10.1364/OE.26.012387.