Hot carriers in plasmonic structures: another look

2021 ◽  
Author(s):  
Jacob B. Khurgin
Keyword(s):  
Hot Carriers ◽  
Plasmonic Structures

scholarly journals Polymorphic gallium for active resonance tuning in photonic nanostructures: from bulk gallium to two-dimensional (2D) gallenene

Nanophotonics ◽  
2020 ◽  
Vol 9 (14) ◽  
pp. 4233-4252
Author(s):  
Yael Gutiérrez ◽  
Pablo García-Fernández ◽  
Javier Junquera ◽  
April S. Brown ◽  
Fernando Moreno ◽  
...  
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Phase Change Materials ◽  
Two Dimensional ◽  
Active Materials ◽  
Promising Candidate ◽  
Plasmonic Structures ◽  
Resonance Tuning ◽  
The Many ◽  
Optical Behavior

AbstractReconfigurable plasmonics is driving an extensive quest for active materials that can support a controllable modulation of their optical properties for dynamically tunable plasmonic structures. Here, polymorphic gallium (Ga) is demonstrated to be a very promising candidate for adaptive plasmonics and reconfigurable photonics applications. The Ga sp-metal is widely known as a liquid metal at room temperature. In addition to the many other compelling attributes of nanostructured Ga, including minimal oxidation and biocompatibility, its six phases have varying degrees of metallic character, providing a wide gamut of electrical conductivity and optical behavior tunability. Here, the dielectric function of the several Ga phases is introduced and correlated with their respective electronic structures. The key conditions for optimal optical modulation and switching for each Ga phase are evaluated. Additionally, we provide a comparison of Ga with other more common phase-change materials, showing better performance of Ga at optical frequencies. Furthermore, we first report, to the best of our knowledge, the optical properties of liquid Ga in the terahertz (THz) range showing its broad plasmonic tunability from ultraviolet to visible-infrared and down to the THz regime. Finally, we provide both computational and experimental evidence of extension of Ga polymorphism to bidimensional two-dimensional (2D) gallenene, paving the way to new bidimensional reconfigurable plasmonic platforms.

scholarly journals Inverse Design of Plasmonic Structures with FDTD

ACS Photonics ◽  
2021 ◽  
Author(s):  
Zhou Zeng ◽  
Prabhu K. Venuthurumilli ◽  
Xianfan Xu
Keyword(s):  
Inverse Design ◽  
Plasmonic Structures

scholarly journals Hot-carriers in organic photovoltaics

2021 ◽  
Vol 93 (2) ◽  
pp. 223-230
Author(s):  
Palas Roy
Keyword(s):  
Organic Photovoltaics ◽  
Excess Energy ◽  
Charge Carriers ◽  
Hot Carriers ◽  
Hot Carrier ◽  
Improve Efficiency ◽  
Coulombic Attraction ◽  
Carrier Escape

Abstract Photogenerated charge carriers in organic photovoltaics (OPVs) suffer relaxation and recombination losses. However, extracting these carriers at higher energy (‘Hot-carriers’) has been found to be effective to overcome such loss pathways and improve efficiency of OPVs. Excess energy and long delocalization length promotes hot-carrier escape from Coulombic attraction and dissociation into free charges. Here, I have reviewed the ways to generate hot-carriers and their extraction in organic backbones. In-depth understanding of their energetics and dynamics will help designing hot-carrier photovoltaics.

scholarly journals Influence of diameter on temperature dynamics of hot carriers in photoexcited GaAsP nanowires

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
Aswathi K. Sivan ◽  
Lorenzo Di Mario ◽  
Yunyan Zhang ◽  
Daniele Catone ◽  
Patrick O’Keeffe ◽  
...  
Keyword(s):  
Hot Carriers ◽  
Temperature Dynamics

Hot carriers in mixed Pb-Sn halide perovskite semiconductors cool slowly while retaining their electrical mobility

2020 ◽  
Vol 102 (24) ◽  
Author(s):  
Maurizio Monti ◽  
K. D. G. Imalka Jayawardena ◽  
Edward Butler-Caddle ◽  
Rajapakshe M. I. Bandara ◽  
Jack M. Woolley ◽  
...  
Keyword(s):  
Electrical Mobility ◽  
Hot Carriers ◽  
Halide Perovskite

Transport in photoexcited hot carriers systems

1988 ◽  
Vol 31 (3-4) ◽  
pp. 497-499 ◽  
Author(s):  
V.N. Freire ◽  
A.R. Vasconcellos ◽  
R. Luzzi
Keyword(s):  
Hot Carriers
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