Zobrazeno 1 - 10
of 632
pro vyhledávání: '"Ciraci P"'
Autor:
Hu, Huatian, Álvarez-Pérez, Gonzalo, Valletta, Antonio, Pea, Marialilia, Ortolani, Michele, Ciracì, Cristian
We propose a microscopic mechanism to electrically reconfigure the Kerr nonlinearity by modulating the concentration of free electrons in heavily doped semiconductors under a static bias. Our theory incorporates electrostatic and hydrodynamic framewo
Externí odkaz:
http://arxiv.org/abs/2412.14082
We demonstrate nanoscale optical bistability at an exceptionally low power threshold of 1 mW by leveraging Kerr-type hydrodynamic nonlinearities due to the heavily doped semiconductor's free carriers. This high nonlinearity is enabled by a strong cou
Externí odkaz:
http://arxiv.org/abs/2406.07750
Autor:
Zheng, Di, Kashif, Muhammad Fayyaz, Piscopo, Linda, Collard, Liam, Ciraci, Cristian, De Vittorio, Massimo, Pisanello, Ferruccio
Creating plasmonic nanoparticles on a tapered optical fiber tip enables a remote SERS sensing probe, ideal for challenging sampling scenarios like biological tissue, specific cells, on-site environmental monitoring, and deep brain structures. However
Externí odkaz:
http://arxiv.org/abs/2404.13695
Autor:
Rossetti, Andrea, Hu, Huatian, Venanzi, Tommaso, Bousseksou, Adel, De Luca, Federico, Deckert, Thomas, Giliberti, Valeria, Pea, Marialilia, Sagnes, Isabelle, Beaudoin, Gregoire, Biagioni, Paolo, Baù, Enrico, Maier, Stefan A., Tittl, Andreas, Brida, Daniele, Colombelli, Raffaele, Ortolani, Michele, Ciracì, Cristian
The development of nanoscale nonlinear elements in photonic integrated circuits is hindered by the physical limits to the nonlinear optical response of dielectrics, which requires that the interacting waves propagate in transparent volumes for distan
Externí odkaz:
http://arxiv.org/abs/2402.15443
Autor:
De Luca, Federico, Ciracì, Cristian
We propose surface modulation of the equilibrium charge density as a technique to control and enhance, via an external static potential, the free electron nonlinear response of heavily doped semiconductors. Within a hydrodynamic perturbative approach
Externí odkaz:
http://arxiv.org/abs/2205.03123
Publikováno v:
Nano Letters 15 (2015) 107-113
We have combined atomic layer lithography and template stripping to produce a new class of substrates for surface-enhanced infrared absorption (SEIRA) spectroscopy. Our structure consists of a buried and U-shaped metal-insulator-metal waveguide whose
Externí odkaz:
http://arxiv.org/abs/2204.07754
Autor:
Yang, Fan, Ciracì, Cristian
Publikováno v:
Phys. Rev. B 105, 235432 (2022)
We present a theoretical study of second-harmonic generation from a singular metasurface. The singular metasurfaces strongly interact with the incident light, where the large field enhancement forms an intense surface polarization that generates the
Externí odkaz:
http://arxiv.org/abs/2204.06844
Autor:
Noor, Ahsan, Khalid, Muhammad, De Luca, Federico, Baghramyan, Henrikh M., Castriotta, Michele, D'Orazio, Antonella, Ciracì, Cristian
Plasmonic waveguides provide an integrated platform to develop efficient nanoscale ultrafast photonic devices. Theoretical models that describe nonlinear optical phenomena in plasmonic waveguides, usually, only incorporate bulk nonlinearities, while
Externí odkaz:
http://arxiv.org/abs/2202.03363
Plasmonic nanoparticles provide an ideal environment for the enhancement of fluorescent emission. On the one hand, they locally amplify the electromagnetic fields, increasing the emitter excitation rate, and on the other hand, they provide a high loc
Externí odkaz:
http://arxiv.org/abs/2111.06491
Publikováno v:
Phys. Rev. B 104, 155435 (2021)
We study the effect of electron spill-out and of nonlocality on the propagation of light inside a gap between two semi-infinite metallic regions. We compare the predictions of a local response model taking into account only the spill-out, to the pred
Externí odkaz:
http://arxiv.org/abs/2107.07210