Optical properties and carrier dynamics of two-dimensional electrons in AlGaN∕GaN single heterostructures

2005 ◽  
Vol 87 (4) ◽  
pp. 041909 ◽  
Author(s):  
Ho-Sang Kwack ◽  
Yong-Hoon Cho ◽  
G. H. Kim ◽  
M. R. Park ◽  
D. H. Youn ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carrier Dynamics ◽  
Two Dimensional

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.

Structural, electronic, and optical properties of two-dimensional hafnium monoxide nanosheets

2021 ◽  
Vol 130 ◽  
pp. 114690
Author(s):  
Xinxin Deng ◽  
Bingcheng Luo ◽  
Zili Zhang ◽  
Changchun Zhao ◽  
Mengjun Shi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Two Dimensional ◽  
Electronic And Optical Properties

scholarly journals Giant Photoluminescence Enhancement and Carrier Dynamics in MoS2 Bilayers with Anomalous Interlayer Coupling

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1994
Author(s):  
Han Li ◽  
Yating Ma ◽  
Zhongjie Xu ◽  
Xiang’ai Cheng ◽  
Tian Jiang
Keyword(s):  
Optical Properties ◽  
Transition Metal Dichalcogenides ◽  
Interlayer Coupling ◽  
Carrier Dynamics ◽  
Probe Signal ◽  
Exciton Resonance ◽  
Pump Probe ◽  
Metal Dichalcogenides ◽  
Photoluminescence Enhancement ◽  
Probe Measurements

Fundamental researches and explorations based on transition metal dichalcogenides (TMDCs) mainly focus on their monolayer counterparts, where optical densities are limited owing to the atomic monolayer thickness. Photoluminescence (PL) yield in bilayer TMDCs is much suppressed owing to indirect-bandgap properties. Here, optical properties are explored in artificially twisted bilayers of molybdenum disulfide (MoS2). Anomalous interlayer coupling and resultant giant PL enhancement are firstly observed in MoS2 bilayers, related to the suspension of the top layer material and independent of twisted angle. Moreover, carrier dynamics in MoS2 bilayers with anomalous interlayer coupling are revealed with pump-probe measurements, and the secondary rising behavior in pump-probe signal of B-exciton resonance, originating from valley depolarization of A-exciton, is firstly reported and discussed in this work. These results lay the groundwork for future advancement and applications beyond TMDCs monolayers.

Auxetic, flexible, and strain-tunable two-dimensional th-AlN for photocatalytic visible light water splitting with anisotropic high carrier mobility

2021 ◽  
Vol 9 (14) ◽  
pp. 4971-4977
Author(s):  
Mehmet Emin Kilic ◽  
Kwang-Ryeol Lee
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Water Splitting ◽  
Carrier Mobility ◽  
Two Dimensional ◽  
Light Water ◽  
Photocatalytic Water Splitting ◽  
Electronic And Optical Properties ◽  
High Carrier Mobility ◽  
High Carrier

Tetrahexagonal AlN: a novel two-dimensional family for photocatalytic water splitting with exceptional mechanical, electronic, and optical properties.

scholarly journals Computational insights into structural, electronic, and optical properties of Janus GeSO monolayer

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 28381-28387
Author(s):  
Thi-Nga Do ◽  
Nguyen N. Hieu ◽  
N. A. Poklonski ◽  
Nguyen Thi Thanh Binh ◽  
Cuong Q. Nguyen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Two Dimensional ◽  
Electronic And Optical Properties

Although O is an element of chalcogen group, the study of two-dimensional (2D) O-based Janus dichalcogenides/monochalcogenides, especially their 1T-phase, has not been given sufficient attention.

Optical properties and carrier dynamics in differently strained GaN epilayers grown on Si by MOVPE

2006 ◽  
Vol 203 (7) ◽  
pp. 1759-1763 ◽  
Author(s):  
E. V. Lutsenko ◽  
V. N. Pavlovskii ◽  
A. V. Danilchyk ◽  
K. A. Osipov ◽  
N. V. Rzheutskii ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carrier Dynamics
Sign in / Sign up

Export Citation Format

Share Document