Now showing items 1-16 of 16

    • Below the surface: unraveling the intricacies of the nonlinear optical properties of aluminum through bound electrons 

      Scalora, Michael; Anson Hallman, Kent; Mukhopadhyay, Shroddha; Pruett, Samuel; Zappa, Dario; Comini, Elisabetta; Ceglia, Domenico de; Vincenti, Maria Antonietta; Akozbek, Neset; Trull Silvestre, José Francisco; Cojocaru, Crina (2024-08-20)
      Article
      Open Access
      By uncovering novel aspects of second harmonic generation in aluminum, we show that there are unusual and remarkable consequences of resonant absorption, namely an unexpectedly critical role that bound electrons play for ...
    • Domain statistics analysis of random nonlinear crystals via second harmonic generation 

      Wang, Bingxia; Cojocaru, Crina; Krolikowski, Wieslaw; Switowski, K; Yan Sheng, Yan Sheng; Akhouayri, H.; Vilaseca Alavedra, Ramon; Scalora, Michael; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      We demonstrate an indirect non-destructive optical method for the characterization of ferroelectric domain size and distribution based on the analysis of the generated second harmonic spatial distribution. This method is ...
    • Electrodynamics of conductive oxides: intensity-dependent anisotropy, reconstruction of the effective dielectric constant, and harmonic generation 

      Scalora, Michael; Trull Silvestre, José Francisco; Ceglia, Domenico de; Vincenti, M. A.; Akozbek, Neset; Coppens, Zachary; Rodríguez Suñé, Laura; Cojocaru, Crina (2020-05-13)
      Article
      Open Access
      We study electromagnetic pulse propagation in an indium tin oxide nanolayer in the linear and nonlinear regimes. We use the constitutive relations to reconstruct the effective dielectric constant of the medium, and show ...
    • Experimental and theoretical study of second and third harmonic generation in amorphous silicon 

      Rodríguez Suñé, Laura; Scalora, Michael; Cojocaru, Crina; Akozbek, Neset; Vilaseca Alavedra, Ramon; Trull Silvestre, José Francisco (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
      Conference report
      Restricted access - publisher's policy
      We report contrasted experimental and theoretical results on second and third harmonic generation from an amorphous silicon nanolayer. We perform this study by analysing the harmonic optical signals generated when fs and ...
    • Experimental and Theoretical Study of Second Harmonic Generation from an ITO Nanolayer 

      Rodríguez Suñé, Laura; Scalora, Michael; Johnson, Allan; Cojocaru, Crina; Akozbek, Neset; Coppens, Zachary; Pérez Salinas, Daniel; Wall, Simon; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Restricted access - publisher's policy
      We present an experimental study of second harmonic generation from a 20nm-thick indium tin oxide layer in the proximity of its epsilon-near-zero condition. We report measurements of second harmonic efficiencies as a ...
    • Harmonic generation at the nanoscale in strategic materials for nanophotonics 

      Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Scalora, Michael; Akozbek, Neset; Cojocaru, Crina (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2021)
      Conference report
      Restricted access - publisher's policy
      The use of semiconductors, metals and conductive oxides in the process of fabrication of actual nano devices is at the front edge of nowadays technology, exploiting the properties of light propagation and localization at ...
    • Harmonic generation from gold nanolayers: bound and hot electron contributions 

      Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Cojocaru, Crina; Akozbek, Neset; Ceglia, Domenico de; Vincenti, M. A.; Scalora, Michael (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2021)
      Conference report
      Restricted access - publisher's policy
      Currently, nanostructures are routinely fabricated and integrated in different photonic devices for a variety of purposes and applications. For instance, in order to engineer properly nano-antennas or filters, it is important ...
    • Harmonic generation from gold nanolayers: bound and hot electron contributions to nonlinear dispersion 

      Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Cojocaru, Crina; Akozbek, Neset; Ceglia, Domenico de; Vincenti, M. A.; Scalora, Michael (2021-03-15)
      Article
      Open Access
      Understanding how light interacts with matter at the nanoscale is pivotal if one is to properly engineer nano-antennas, filters and other devices whose geometrical features approach atomic size. We report experimental ...
    • Harmonic generation from silicon membranes at visible and ultraviolet wavelengths 

      Anson Hallman, Kent; Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Cojocaru, Crina; Vincenti, Maria Antonietta; Akozbek, Neset; Vilaseca, Ramon; Scalora, Michael (2023-01-16)
      Article
      Open Access
      Nonlinear silicon photonics offers unique abilities to generate, manipulate and detect optical signals in nano-devices, with applications based on field localization and large third order nonlinearity. However, at the ...
    • Large nonlinear efficiency enhancement in the visible and UV range from plasmonic gold nanogratings 

      Cojocaru, Crina; Mukhopadhyay, Shroddha; Rodríguez Suñé, Laura; Vicenti, Maria Antonietta; Vilaseca Alavedra, Ramon; Scalora, Michael; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Conference report
      Restricted access - publisher's policy
      We report a combined experimental/theoretical investigation on second and third harmonic generation from a plasmonic gold nanograting, that exhibits a plasmonic resonance in the near IR. The intense field localization leads ...
    • Nonlinear duffing oscillator model for third harmonic generation 

      Scalora, Michael; Vincenti, M. A.; Ceglia, Domenico de; Cojocaru, Crina; Grande, Manuel; Haus, J.W. (2015-10-01)
      Article
      Open Access
      We employ a classical, nonlinear Lorentz-Duffing oscillator model to predict third harmonic conversion efficiencies in the ultrafast regime, from a variety of metal nanostructures, including smooth, isolated metal layers, ...
    • Retrieving linear and nonlinear optical dispersions of matter: combined experiment-numerical ellipsometry in silicon, gold and indium tin oxide 

      Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Akozbek, Neset; Ceglia, Domenico de; Vincenti, M. A.; Scalora, Michael; Cojocaru, Crina (2021-09-17)
      Article
      Open Access
      We have presented a combined experimental and numerical method that can be used to predict complex nonlinear dispersion curves in almost any material, based exclusively on the experimental determination of harmonic generation ...
    • Second and third harmonic generation from gold nanolayers: experiment versus theory 

      Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Akozbek, Neset; Ceglia, Domenico de; Vincenti, M. A.; Scalora, Michael; Cojocaru, Crina (EPJ Web of Conferences, 2021)
      Conference report
      Open Access
      The use of semiconductors, metals, or ordinary dielectrics in the process of fabrication of nanodevices is at the front edge of nowadays technology, exploiting the properties of light propagation and localization at ...
    • Second harmonic generation from an ITO nanolayer: experiment versus theory 

      Rodríguez Suñé, Laura; Scalora, Michael; Johnson, Allan; Cojocaru, Crina; Akozbek, Neset; Coppens, Zachary; Pérez Salinas, Daniel; Wall, Simon; Trull Silvestre, José Francisco (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
      Conference report
      Open Access
      We report a comparative experimental and theoretical study of second harmonic generation from a 20nm-thick indium tin oxide nanolayer in the proximity of the epsilon-near-zero condition. We record the efficiency of the ...
    • Surface and bulk harmonic generation in the opaque region of GaAs 

      Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Scalora, Michael; Cojocaru, Crina (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      We demonstrate second and third harmonic generation from a GaAs substrate, well-bellow the absorption edge, in both transmission and reflection geometries. The pump is tuned at 1064 nm, in the transparency range, while the ...
    • Three orders of magnitude enhancement of second and third harmonic generation in the visible and ultraviolet ranges from plasmonic gold nanogratings 

      Mukhopadhyay, Shroddha; Rodríguez Suñé, Laura; Cojocaru, Crina; Vincenti, M. A.; Anson Hallman, Kent; Leo, Giuseppe; Belchovski, Metodi; Ceglia, Domenico de; Scalora, Michael; Trull Silvestre, José Francisco (2023-04-07)
      Article
      Open Access
      We report experimental observations and numerical simulations of second and third harmonic generation from a gold nanograting, which exhibits a plasmonic resonance in the near infrared. The resonance is tunable, with a ...