Session Overview |
Thursday, May 30 |
08:00 |
Enhanced Nonlinear Effects from Hybrid Quantum Dots-Plasmonic Metasurface Interactions
* Jeetendra Gour, Friedrich Schiller University Jena, Germany Sebastian Beer, Friedrich Schiller University Jena, Germany Raktim Baruah, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Germany Alessandro Alberucci, Friedrich Schiller University Jena, Germany Maria Wächtler, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Germany Stefan Nolte, Friedrich Schiller University Jena, Germany Uwe Detlef Zeitner, HM Hochschule München University of Applied Sciences, Germany We explore the interaction between plasmonic metasurfaces and CdSe quantum dots (QDs), focusing on the enhancement of the nonlinear optical phenomena. We show that already the surface lattice resonances (SLRs) from plasmonic metasurfaces alone can enhance second harmonic generation (SHG) by orders of magnitude. Further, we show different regimes for the optical emission from the metasurface-QD systems, including photoluminescence (PL), SHG and broadband white light. These findings highlight the potential of plasmonic metasurface-QD hybrids in nanoscale light manipulation, promising advancements in quantum photonics and engineering of light-matter interaction at the quantum level. |
08:15 |
MoS2 Exciton and Plasmon Coupling Manipulation
* Nathan Eddy, Queen's University, Canada Kurt Tyson, Queen's University, Canada Robert Knobel, Queen's University, Canada Coupling of 2D material excitons to plasmons in metal nanoparticles can form light-matter hybrid particles known as exciton-plasmon polaritons or “plexcitons”. Room temperature plexciton devices hold promise for next generation polariton optoelectronics as well as studying novel light-matter interactions. Despite recent accomplishments in achieving strong coupling in these systems, factors influencing the coupling strength have not yet been thoroughly investigated. Using darkfield scattering, we demonstrate coupling of monolayer MoS2 excitons to gold nanocylinder array plasmons and achieve a Rabi splitting of 90meV. Additionally, we show how chemically treating the MoS2/nanocylinder system with an organic superacid enhances their radiative emissions and shifts plexciton resonance. |
08:30 |
Near-field Hot Spots Using Patterned Metasurfaces
* Nasim Mohammadi Estakhri, Chapman University, United States of America Michael Cheng, Chapman University, United States of America Nooshin M. Estakhri, Chapman University, United States of America Using carefully designed ultrathin metasurfaces, we demonstrate the possibility of creating arbitrary near-field distributions with deeply subwavelength features. These metasurfaces are tuned to only manipulate the incoming electromagnetic wave in the near-field and without creating unwanted backscattering. This feature creates the exciting possibility of creating deeply subwavelength hot spots with potential applications in nonlinear optics, sensing, and imaging. |
08:55 |
Plasmonic Pentamer-Arranged Nanohole Arrays
Wei Ru Wong, University of Malaysia Hyung Woo Choi, University of Ottawa Fatemeh Fouladi Mahani, Shahid Bahonar University of Kerman Luis Angel Moyoral Astorga, University of Ottawa Arash Mokhtari, Shahid Bahonar University of Kerman * Pierre Berini, University of Ottawa, Canada We report the theoretical and experimental investigation of pentamer arrangements of nanoholes in a thin Au film arrayed over a large area. The pentamer arrangements support coupled plasmonic resonances localized to the nanoholes that exhibit a high near-field sensitivity and low polarization dependance. The structures are compelling for applications in biosensing and in surface enhanced Raman scattering (SERS). |