Spatially confined photoexcitation with triplet-triplet annihilation upconversion

2021 ◽  
Author(s):  
Zhijia Wang ◽  
Yuqi Hou ◽  
Zepeng Huo ◽  
Qiang Liu ◽  
Weiqing Xu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Confocal Microscope ◽  
Photon Absorption ◽  
Spatial Confinement ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Triplet Triplet Annihilation

Two-photon absorption (TPA) has been widely used in confocal microscope, photo-initiated three-dimensional (3D) polymerization, and 3D-micro/nanofabrication. These applications are based on the spatial confinement of the TPA excitation, due to...

Fabrication of Three-Dimensional Micro-Structures with Two-Photon Absorption by Femtosecond Laser

2006 ◽  
Vol 532-533 ◽  
pp. 568-571
Author(s):  
Ming Zhou ◽  
Hai Feng Yang ◽  
Li Peng Liu ◽  
Lan Cai
Keyword(s):  
Photonic Crystal ◽  
Femtosecond Laser ◽  
Detection System ◽  
Three Dimensional ◽  
Photon Absorption ◽  
Micro Fabrication ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photo Polymerization ◽  
System A

The photo-polymerization induced by Two-Photon Absorption (TPA) is tightly confined in the focus because the efficiency of TPA is proportional to the square of intensity. Three-dimensional (3D) micro-fabrication can be achieved by controlling the movement of the focus. Based on this theory, a system for 3D-micro-fabrication with femtosecond laser is proposed. The system consists of a laser system, a microscope system, a real-time detection system and a 3D-movement system, etc. The precision of micro-machining reaches a level down to 700nm linewidth. The line width was inversely proportional to the fabrication speed, but proportional to laser power and NA. The experiment results were simulated, beam waist of 0.413μm and TPA cross section of 2×10-54cm4s was obtained. While we tried to optimize parameters, we also did some research about its applications. With TPA photo-polymerization by means of our experimental system, 3D photonic crystal of wood-pile structure twelve layers and photonic crystal fiber are manufactured. These results proved that the micro-fabrication system of TPA can not only obtain the resolution down to sub-micron level, but also realize real 3D micro-fabrication.

An Exhaustive Analysis of the Characterization of Photopolymer Material (SZ2080) by Two-Photon Polymerization, Waves Moving in a Periodic Potential, and Two-Photon Absorption

2020 ◽  
Vol 1003 ◽  
pp. 165-172 ◽  
Author(s):  
Ritu Walia ◽  
Kamal Nain Chopra
Keyword(s):  
Photonic Crystals ◽  
Quantum Coherence ◽  
Periodic Potential ◽  
Three Dimensional ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Polymerization Waves ◽  
Two Photon Polymerization

This paper presents an Exhaustive Analysis of the Characterization of Photopolymer Material (SZ2080) by Two-Photon Polymerization, and some of the modern concepts like Characterization of Photonic Crystals in Photopolymer SZ2080 by Two-Photon Polymerization, Waves Moving in a Periodic Potential, and Optical Quantum metamaterials. Two-photon polymerization for fabricating three-dimensional subdiffraction-limited structures has been discussed. Experimental and Computed Curves of line thickness (nm) vs feed rate (μm/s) have been technically analyzed. Waves moving in a Periodic Potential and Photonic Crystals have been technically discussed. In addition, Optical Quantum metamaterials have been discussed in terms of quantum coherence, and quantum dots with emphasis on cavity array metamaterial.

Photon upconversion: from two-photon absorption (TPA) to triplet–triplet annihilation (TTA)

2016 ◽  
Vol 18 (16) ◽  
pp. 10818-10835 ◽  
Author(s):  
Changqing Ye ◽  
Liwei Zhou ◽  
Xiaomei Wang ◽  
Zuoqin Liang
Keyword(s):  
Molecular Engineering ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Recent Advances ◽  
Triplet Triplet Annihilation

Recent advances and remaining challenges are presented in the areas of TPA/TTA-UC, with particular emphasis on molecular engineering of these two upconversion materials.

Enhanced Two-Photon 3D Optical Storage in a Novel Multibranched-Dye Doped Photobleaching Polymer

2012 ◽  
Vol 476-478 ◽  
pp. 1245-1248 ◽  
Author(s):  
Fu Quan Guo ◽  
Ji Hu ◽  
Bin Guo ◽  
Hao Liang
Keyword(s):  
Data Storage ◽  
Three Dimensional ◽  
Optical Data Storage ◽  
Photon Absorption ◽  
Optical Data ◽  
The Novel ◽  
Two Photon Absorption ◽  
Two Photon ◽  
3D Data ◽  
Femtosecond Laser Beam

A novel multibranched nonlinear dye，4, 4´, 4´´-tris(9-carbazyl-trans-styryl) triphenylamine (TCSTPA)，has been designed and synthesized aimed at two-photon absorption applications. Two-photon absorption cross section of the multibranched dye was obtained as high as 2.35×10-47cm4s photon-1molecule-1pumped with femtosecond laser beam at 800 nm. One-photon and two-photon absorption optical properties were demonstrated in solutions. Three-dimensional (3D) optical data storage experiments were carried out by two-photon photobleaching in the multibranched-dye doped polymethylmethacryate (PMMA) with a 3D data storage density of approximate 14 Gbits/cm3. Research on the two-photon photobleaching ability shows the novel two-photon absorption dye with multibranched molecular motif has higher photosensitivity than traditional linear two-photon absorption dyes do.

Three-dimensional memory system based on two-photon absorption

1994 ◽  
Author(s):  
Ram Piyaket ◽  
Ilkan Cokgor ◽  
Sadik C. Esener ◽  
Chad S. Solomon ◽  
Susan Hunter ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Memory System ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals 3D Nanoprinting Technologies for Tissue Engineering Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Jin Woo Lee
Keyword(s):  
Tissue Engineering ◽  
Tissue Regeneration ◽  
Three Dimensional ◽  
Photon Absorption ◽  
Tissue Formation ◽  
Original Function ◽  
Cell Dynamics ◽  
Scaffold Fabrication ◽  
Two Photon Absorption ◽  
Two Photon

Tissue engineering recovers an original function of tissue by replacing the damaged part with a new tissue or organ regenerated using various engineering technologies. This technology uses a scaffold to support three-dimensional (3D) tissue formation. Conventional scaffold fabrication methods do not control the architecture, pore shape, porosity, or interconnectivity of the scaffold, so it has limited ability to stimulate cell growth and to generate new tissue. 3D printing technologies may overcome these disadvantages of traditional fabrication methods. These technologies use computers to assist in design and fabrication, so the 3D scaffolds can be fabricated as designed and standardized. Particularly, because nanofabrication technology based on two-photon absorption (2PA) and on controlled electrospinning can generate structures with submicron resolution, these methods have been evaluated in various areas of tissue engineering. Recent combinations of 3D nanoprinting technologies with methods from molecular biology and cell dynamics have suggested new possibilities for improved tissue regeneration. If the interaction between cells and scaffold system with biomolecules can be understood and controlled and if an optimal 3D environment for tissue regeneration can be realized, 3D nanoprinting will become an important tool in tissue engineering.

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