Light-to-heat dissipation in nanoscale structures: from ultrafast optical modulation to steam generation

2021 ◽  
Author(s):  
Alessandro Alabastri
Keyword(s):  
Heat Dissipation ◽  
Optical Modulation ◽  
Steam Generation ◽  
Nanoscale Structures ◽  
Ultrafast Optical

Ultrafast optical modulation of terahertz metamaterials

2011 ◽  
Vol 13 (12) ◽  
pp. 125102 ◽  
Author(s):  
Qingli Zhou ◽  
Yulei Shi ◽  
Aihua Wang ◽  
Lei Li ◽  
Dongmei Zhao ◽  
...  
Keyword(s):  
Optical Modulation ◽  
Ultrafast Optical ◽  
Terahertz Metamaterials

Ultrafast Optical Modulation of Harmonic Generation in Two-Dimensional Materials

Nano Letters ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 8053-8058
Author(s):  
Yang Cheng ◽  
Hao Hong ◽  
Hui Zhao ◽  
Chunchun Wu ◽  
Yu Pan ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Optical Modulation ◽  
Two Dimensional ◽  
Ultrafast Optical ◽  
Two Dimensional Materials

scholarly journals Carrier multiplication in van der Waals layered transition metal dichalcogenides

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ji-Hee Kim ◽  
Matthew R. Bergren ◽  
Jin Cheol Park ◽  
Subash Adhikari ◽  
Michael Lorke ◽  
...  
Keyword(s):  
Heat Dissipation ◽  
Van Der Waals ◽  
Transition Metal Dichalcogenides ◽  
High Energy ◽  
Ultrafast Optical ◽  
Photovoltaic Energy Conversion ◽  
Carrier Multiplication ◽  
Ultrafast Optical Spectroscopy ◽  
Metal Dichalcogenides ◽  
Layered Transition Metal

AbstractCarrier multiplication (CM) is a process in which high-energy free carriers relax by generation of additional electron-hole pairs rather than by heat dissipation. CM is promising disruptive improvements in photovoltaic energy conversion and light detection technologies. Current state-of-the-art nanomaterials including quantum dots and carbon nanotubes have demonstrated CM, but are not satisfactory owing to high-energy-loss and inherent difficulties with carrier extraction. Here, we report CM in van der Waals (vdW) MoTe2 and WSe2 films, and find characteristics, commencing close to the energy conservation limit and reaching up to 99% CM conversion efficiency with the standard model. This is demonstrated by ultrafast optical spectroscopy with independent approaches, photo-induced absorption, photo-induced bleach, and carrier population dynamics. Combined with a high lateral conductivity and an optimal bandgap below 1 eV, these superior CM characteristics identify vdW materials as an attractive candidate material for highly efficient and mechanically flexible solar cells in the future.

scholarly journals All-optical modulation with 2D layered materials: status and prospects

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2107-2124 ◽  
Author(s):  
Haitao Chen ◽  
Cong Wang ◽  
Hao Ouyang ◽  
Yufeng Song ◽  
Tian Jiang
Keyword(s):  
2D Materials ◽  
Optical Modulation ◽  
Optical Modulators ◽  
Ultrafast Optical ◽  
2D Layered Materials ◽  
Transitional Metal ◽  
All Optical ◽  
Challenges And Opportunities ◽  
Metal Dichalcogenides ◽  
Increasing Demand

AbstractOptical modulation technique plays a crucial role in photonics technologies, and there is an ever-increasing demand for broadband and ultrafast optical modulation in the era of artificial intelligence. All-optical modulation is known to be able to operate in an ultrafast way and has a broadband response, showing great potential in applications for ultrafast information processing and photonic computing. Two-dimensional (2D) materials with exotic optoelectronic properties bring tremendous new opportunities for all-optical modulators with excellent performance, which have attracted lots of attention recently. In this review, we cover the state-of-art all-optical modulation based on 2D materials, including graphene, transitional metal dichalcogenides, phosphorus, and other novel 2D materials. We present the operations mechanism of different types of all-optical modulators with various configurations, such as fiber-integrated and free-space ones. We also discuss the challenges and opportunities faced by all-optical modulation, as well as offer some future perspectives for the development of all-optical modulation based on 2D materials.

Ultrafast optical modulation of exchange coupling in FePt∕CoFe composite structure

2008 ◽  
Vol 92 (16) ◽  
pp. 162513 ◽  
Author(s):  
Yang Ren ◽  
Hui Zhao ◽  
Zongzhi Zhang ◽  
Q. Y. Jin
Keyword(s):  
Composite Structure ◽  
Exchange Coupling ◽  
Optical Modulation ◽  
Ultrafast Optical
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