scholarly journals Deterministic Insertion of KTP Nanoparticles into Polymeric Structures for Efficient Second-Harmonic Generation

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 365 ◽  
Author(s):  
Dam Thuy Trang Nguyen ◽  
Ngoc Diep Lai

We investigate theoretically and experimentally the creation of virtually any polymer-based photonic structure containing individual nonlinear KTiOPO 4 nanoparticles (KTP NPs) using low one-photon absorption (LOPA) direct laser writing (DLW) technique. The size and shape of polymeric microstructures and the position of the nonlinear KTP crystal inside the structures, were perfectly controlled at nanoscale and on demand. Furthermore, we demonstrated an enhancement of the second-harmonic generation (SHG) by a factor of 90 when a KTP NP was inserted in a polymeric pillar. The SHG enhancement is attributed to the resonance of the fundamental light in the cavity. This enhancement varied for different KTP NPs, because of the random orientation of the KTP NPs, which affects the light/matter interaction between the fundamental light and the NP as well as the collection efficiency of the SHG signal. The experimental result are further supported by a simulation model using Finite-Difference Time-Domain (FDTD) method.

2005 ◽  
Vol 19 (05) ◽  
pp. 869-878 ◽  
Author(s):  
JIANPING SHI ◽  
XIANZHONG CHEN ◽  
XUNAN CHEN ◽  
HANMIN YAO ◽  
GAIRONG YANG ◽  
...  

We report optical second harmonic generation (OSHG) in a two dimension photonic crystal of centro-symmetric dielectric based on finite difference time domain (FDTD) algorithm. The electromagnetic field distribution in the structure and the intensity of second harmonic (SH) from electric quadrupole polarization along the waveguide are analyzed. The results show that the acute spatial variation of electromagnetic field results in the radiation of SH, and the intensity is proportional to the square of waveguide length. When the beam intensity of the pumping wave is 1.3 MW/mm2, which has wavelength of 10.6 μm, the conversion efficiency of power is 0.307% for a photonic crystal of Silicon with a length of 40 μm.


Nanoscale ◽  
2019 ◽  
Vol 11 (37) ◽  
pp. 17293-17300 ◽  
Author(s):  
Michael T. Quick ◽  
Nina Owschimikow ◽  
Ali Hossain Khan ◽  
Anatolii Polovitsyn ◽  
Iwan Moreels ◽  
...  

We investigate broadband two-photon absorption autocorrelators based on II–VI semiconductor nanoplatelets as an alternative to common second harmonic generation based techniques.


2013 ◽  
Author(s):  
Pusala Aditya ◽  
Hari Kumar ◽  
Sunil Kumar ◽  
Rajashekar ◽  
M. Muralikrishna ◽  
...  

1999 ◽  
Vol 24 (11) ◽  
pp. 756 ◽  
Author(s):  
Todd G. Ulmer ◽  
Ronson K. Tan ◽  
Zhiping Zhou ◽  
Stephen E. Ralph ◽  
Richard P. Kenan ◽  
...  

2004 ◽  
Vol 14 (15) ◽  
pp. 2443 ◽  
Author(s):  
Yue-zhi Cui ◽  
Qi Fang ◽  
Zhen-li Huang ◽  
Gang Xue ◽  
Gui-bao Xu ◽  
...  

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