Imaging of collagen matrix remodeling in three-dimensional space using second harmonic generation and two photon excitation fluorescence

2009 ◽  
Author(s):  
Thomas Abraham ◽  
Jon Carthy ◽  
Bruce McManus
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Collagen Matrix ◽  
Matrix Remodeling ◽  
Two Photon ◽  
Photon Excitation ◽  
Three Dimensional Space

scholarly journals Spatially-Controllable Hot Spots for Plasmon-Enhanced Second-Harmonic Generation in AgNP-ZnO Nanocavity Arrays

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1012
Author(s):  
Shaoxin Shen ◽  
Min Gao ◽  
Rongcheng Ban ◽  
Huiyu Chen ◽  
Xiangjie Wang ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Hybrid Systems ◽  
Harmonic Generation ◽  
Hot Spots ◽  
Second Harmonic ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Excitation Energies ◽  
High Loss ◽  
Relative Contribution

Plasmon-enhanced second-harmonic generation (PESHG) based on hybrid metal-dielectric nanostructures have extraordinary importance for developing efficient nanoscale nonlinear sources, which pave the way for new applications in photonic circuitry, quantum optics, and biosensors. However, the relatively high loss of excitation energies and the low spatial overlapping between the locally enhanced electromagnetic field and nonlinear materials still limit the promotion of nonlinear conversion performances in such hybrid systems. Here, we design and fabricate an array of silver nanoparticle-ZnO (AgNP-ZnO) nanocavities to serve as an efficient PESHG platform. The geometry of AgNP-ZnO nanocavity arrays provides a way to flexibly modulate hot spots in three-dimensional space, and to achieve a good mutual overlap of hot spots and ZnO material layers for realizing efficient SH photon generation originating from ZnO nanocavities. Compared to bare ZnO nanocavity arrays, the resulting hybrid AgNP-ZnO design of nanocavities reaches the maximum PESHG enhancement by a factor of approximately 31. Validated by simulations, we can further interpret the relative contribution of fundamental and harmonic modes to Ag-NP dependent PESHG performances, and reveal that the enhancement stems from the co-cooperation effect of plasmon-resonant enhancements both for fundamental and harmonic frequencies. Our findings offer a previously unreported method for designing efficient PESHG systems and pave a way for further understanding of a surface plasmon-coupled second-order emission mechanism for the enhancement of hybrid systems.

Sign in / Sign up

Export Citation Format

Share Document