scholarly journals Recent Progress in Two-Dimensional Nanomaterials for Laser Protection

Chemistry ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 17-43 ◽  
Author(s):  
Zhiwei Liu ◽  
Bin Zhang ◽  
Yu Chen
Keyword(s):  
Laser Physics ◽  
Recent Progress ◽  
Continuous Wave ◽  
Two Dimensional ◽  
Relaxation Dynamics ◽  
Daily Lives ◽  
Carrier Relaxation ◽  
Optical Instruments ◽  
2D Nanomaterials ◽  
Human Eyes

The Nobel Prize in Physics 2018, “For groundbreaking inventions in the field of laser physics”, went to Arthur Ashkin and Gérard Mourou and Donna Strickland. Their inventions have revolutionized laser physics and greatly promoted the development of laser instruments, which have penetrated into many aspects of people’s daily lives. However, for the purpose of protecting human eyes or optical instruments from being damaged by both pulsed and continuous wave laser radiation, the research on laser protective materials is of particular significance. Due to the intriguing and outstanding physical, chemical, and structural properties, two-dimensional (2D) nanomaterials have been extensively studied as optical limiting (OL) materials owing to their broadband nonlinear optical (NLO) response and fast carrier relaxation dynamics that are important for reducing the laser intensity. This review systematically describes the OL mechanisms and the recent progress in 2D nanomaterials for laser protection.

Femtosecond Exciton and Carrier Relaxation Dynamics of Two-Dimensional (2D) and Quasi-2D Tin Perovskites

2021 ◽  
pp. 12292-12299
Author(s):  
Sudhakar Narra ◽  
Chia-Yi Lin ◽  
Ashank Seetharaman ◽  
Efat Jokar ◽  
Eric Wei-Guang Diau
Keyword(s):  
Two Dimensional ◽  
Relaxation Dynamics ◽  
Carrier Relaxation ◽  
Carrier Relaxation Dynamics

Photo-excited carrier relaxation dynamics in two-dimensional InSe flakes

2019 ◽  
Vol 31 (9) ◽  
pp. 095713
Author(s):  
Ying Li ◽  
Jialiang Ye ◽  
Kai Yuan ◽  
Guihao Zhai ◽  
Ting Li ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Relaxation Dynamics ◽  
Carrier Relaxation ◽  
Excited Carrier ◽  
Carrier Relaxation Dynamics

scholarly journals Non-volatile resistive memory devices based on solution-processed ultrathin two-dimensional nanomaterials

2015 ◽  
Vol 44 (9) ◽  
pp. 2615-2628 ◽  
Author(s):  
Chaoliang Tan ◽  
Zhengdong Liu ◽  
Wei Huang ◽  
Hua Zhang
Keyword(s):  
Rational Design ◽  
Recent Progress ◽  
Memory Devices ◽  
Two Dimensional ◽  
Resistive Memory ◽  
Solution Processed ◽  
2D Nanomaterials

This tutorial review summarizes the recent progress in the rational design and preparation of solution-processed ultrathin 2D nanomaterials for non-volatile resistive memory devices.

scholarly journals Long-living nonlinear behavior in CsPbBr3 carrier recombination dynamics

Nanophotonics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1447-1455 ◽  
Author(s):  
Fabio Gabelloni ◽  
Francesco Biccari ◽  
Naomi Falsini ◽  
Nicola Calisi ◽  
Stefano Caporali ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Nonlinear Behavior ◽  
Bulk Sample ◽  
High Energy ◽  
Localized States ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Carrier Relaxation ◽  
Carrier Recombination ◽  
Picosecond Excitation

AbstractBy means of time-resolved photoluminescence (TR-PL) spectroscopy, we present a detailed investigation of the carrier relaxation dynamics in a CsPbBr3 bulk sample and microcrystal ensemble at cryogenic temperature on a picosecond time scale. We provide evidence of a long temperature-dependent cooling rate for the excitons and free carriers population, with an initial cooling time constant of a few tens of picoseconds. A relaxation bottleneck in the thermalization process was found that cannot be explained by the Auger effect or hot phonon population, since we address a very low excitation regime, not commonly investigated in literature, where such processes are not effective. Adding a continuous wave optical bias to the picosecond excitation, we probed the photoinduced PL decrease of the localized states and the photoinduced PL increase of the population in the high energy states. A long recovery time from the photoinduced PL decrease was found for localized states and quite significant differences were detected, depending on the resonance/off resonance bias used in the experiment.

Mechanics of free-standing inorganic and molecular 2D materials

Nanoscale ◽  
2021 ◽  
Author(s):  
Xianghui Zhang ◽  
Andre Beyer
Keyword(s):  
Recent Progress ◽  
Mechanical Characterization ◽  
2D Materials ◽  
Two Dimensional ◽  
Free Standing ◽  
Inorganic As

The discovery of graphene has triggered a great interest in inorganic as well as molecular two-dimensional (2D) materials. In this review, we summarize recent progress in the mechanical characterization of...

scholarly journals Template-Free Self-Assembly of Two-Dimensional Polymers into Nano/Microstructured Materials

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3310
Author(s):  
Shengda Liu ◽  
Jiayun Xu ◽  
Xiumei Li ◽  
Tengfei Yan ◽  
Shuangjiang Yu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Recent Progress ◽  
Two Dimensional ◽  
Subsequent Removal ◽  
The Past ◽  
2D Polymers ◽  
Template Free ◽  
Self Assembled ◽  
The Relationship ◽  
Polymer Tubes

In the past few decades, enormous efforts have been made to synthesize covalent polymer nano/microstructured materials with specific morphologies, due to the relationship between their structures and functions. Up to now, the formation of most of these structures often requires either templates or preorganization in order to construct a specific structure before, and then the subsequent removal of previous templates to form a desired structure, on account of the lack of “self-error-correcting” properties of reversible interactions in polymers. The above processes are time-consuming and tedious. A template-free, self-assembled strategy as a “bottom-up” route to fabricate well-defined nano/microstructures remains a challenge. Herein, we introduce the recent progress in template-free, self-assembled nano/microstructures formed by covalent two-dimensional (2D) polymers, such as polymer capsules, polymer films, polymer tubes and polymer rings.

Continuous-wave diode laserthermokeratoplasty: First clinical experience in blind human eyes

1999 ◽  
Vol 25 (1) ◽  
pp. 32-40 ◽  
Author(s):  
Gerd Geerling ◽  
Norbert Koop ◽  
Ralf Brinkmann ◽  
Andreas Tüngler ◽  
Christopher Wirbelauer ◽  
...  
Keyword(s):  
Clinical Experience ◽  
Continuous Wave ◽  
Human Eyes

Terahertz-wave generation using graphene

2012 ◽  
Vol 1437 ◽  
Author(s):  
Taiichi Otsuji ◽  
Stephane Boubanga Tombet ◽  
Akira Satou ◽  
Maxim Ryzhii ◽  
Victor Ryzhii
Keyword(s):  
Terahertz Wave ◽  
Wave Generation ◽  
Nonequilibrium Carrier ◽  
Terahertz Range ◽  
Two Dimensional ◽  
Carrier Relaxation ◽  
Dynamic Conductivity ◽  
Electrically Pumped ◽  
Terahertz Lasers ◽  
Recombination Dynamics

ABSTRACTIn this paper recent advances in terahertz-wave generation in graphene are reviewed. First, fundamental basis of the optoelectronic properties of graphene is introduced. Second, nonequilibrium carrier relaxation and recombination dynamics in optically or electrically pumped graphene is described to introduce a possibility of negative dynamic conductivity in a wide terahertz range. Third, recent theoretical advances toward the creation of current-injection graphene terahertz lasers are described. Fourth, unique terahertz dynamics of the two-dimensional plasmons in graphene are described. Finally, the advantages of graphene materials and devices for terahertz-wave generation are summarized.

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