Hernández Martínez, Osmery
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Hernández Martínez
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Osmery
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Ingeniería Eléctrica, Electrónica y de Comunicación
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Publication Open Access Quantum interference in Wilkinson power dividers(John Wiley & Sons, 2022) Hernández Martínez, Osmery; Ortega Gómez, Ángel; Bravo Acha, Mikel; Liberal Olleta, Íñigo; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de ComunicaciónScaling up quantum technologies entails the challenge of developing large-scale and high-performance photonic quantum networks. Engineering novel optical components, with a compact footprint and advanced functionalities, might help addressing this challenge by reducing the size and complexity of optical networks. Here, quantum interference phenomena in Wilkinson power dividers (WPDs), a popular element of microwave networks, is investigated. It is theoretically demonstrated that WPDs grant access to coherent perfect absorption (CPA) quantum state transformations (single photon CPA, coherent absorption of N00N states, two-photon nonlinear absorption, and absorption of coherence in squeezed light) in CPA networks with a smaller footprint and a reduced number of elements. Additionally, it is shown how a WPD can be designed in a pure silicon-on-insulator platform by taking advantage of radiative losses. These findings might represent an important step forward in the development of CPA quantum networks.Publication Open Access On the lossy character of Y-branches and their analogy to Wilkinson power dividers(Optica Publishing Group, 2024-11-04) Oña Valladares, Douglas; Hernández Martínez, Osmery; Ortega Gómez, Ángel; González-Andrade, David; Liberal Olleta, Íñigo; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Institute of Smart Cities - ISCY-branches are commonly used devices for power splitting and combining in various technological applications. Despite their widespread use, research on their design and analysis has been mostly focused on their characterization based on reflection and transmission when operating as power dividers, leaving aside an exhaustive consideration of all their possible modes of operation. Also, it has not been fully recognized that these devices have intrinsic losses. If these losses are not properly managed, they can negatively impact the network, but also open the door to new opportunities. In this context, this paper examines Y-bifurcation properties and their connection to Wilkinson's power dividers. Additionally, through numerical analysis, we demonstrate the possibility of integrating these devices into more complex optical networks. We use them as components in generalized power dividers and analog optical computational systems designed to filter out the maximum common phase component and avoid backward reflections for any input signal.