Enhanced Third Harmonic Generation in Ultrathin Free-standing β-Ga2O3 Nanomembranes: Study on Surface and Bulk Contribution

Nanoscale ◽  
2021 ◽  
Author(s):  
Young-Jin KIM ◽  
Gao Yi ◽  
Sangheon Jeon ◽  
Young Woo Kwon ◽  
Jongkyoon Park ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Free Standing ◽  
Third Harmonic ◽  
Interface Characterization ◽  
Surface And Interface ◽  
Light Manipulation ◽  
Bio Imaging ◽  
Wavelength Light ◽  
Sub Wavelength

Third harmonic generation (THG) has proven its value in surface and interface characterization, high-contrast bio-imaging, and sub-wavelength light manipulation. Although THG is observed widely in general solid and liquid substances,...

scholarly journals Third-harmonic generation from arrays of sub-wavelength metal apertures

2009 ◽  
Vol 17 (26) ◽  
pp. 23582 ◽  
Author(s):  
Tingjun Xu ◽  
Xiaojin Jiao ◽  
Steve Blair
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
Sub Wavelength

scholarly journals Third-harmonic generation in optical nanoantennas: efficiency enhancement

2021 ◽  
Author(s):  
Zahra Razavi ◽  
Hassan Pakarzadeh ◽  
Najmeh Nozhat
Keyword(s):  
Harmonic Generation ◽  
Indium Tin Oxide ◽  
Third Harmonic Generation ◽  
Nonlinear Phenomena ◽  
Third Harmonic ◽  
Field Radiation ◽  
Proper Design ◽  
Dielectric Nanoparticle ◽  
Optical Nanoantennas ◽  
Sub Wavelength

Abstract Optical nanoantennas have attracted a lot of research interest over the last decade owing to their unique characteristics in concentrating far-field radiation into the sub-wavelength dimensions. Also, they have been recently utilized to enhance the functionality of nonlinear optical devices. By inserting a dielectric nanoparticle within the gap of a dipole nanoantenna, the third-harmonic generation (THG) emission can be boosted. In this study, we simulate dipole and bowtie nanoantennas and compare their THG output spectra with and without the presence of indium tin oxide (ITO) nanocrystal in the nanoantennas gap. The results show that with proper design of the nanoantenna and changing the geometry from the dipole to the bowtie shape as well as inserting the ITO nanocrystal, the THG efficiency can be enhanced by a factor of three, which is higher than the dipole counterpart reported in recent established works. Our work opens a new window to generate more efficient nonlinear phenomena at nanoscale devices.

scholarly journals Silicon nanowire/polymer membrane for infrared visualization via third-harmonic generation

2021 ◽  
Vol 2015 (1) ◽  
pp. 012096
Author(s):  
Anna Nikolaeva ◽  
Vladimir V. Fedorov ◽  
Alexander S. Gudovskikh ◽  
Ivan A. Morozov ◽  
Viktoria Mastalieva ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Silicon Nanowire ◽  
Nanowire Array ◽  
Harmonic Signal ◽  
Third Harmonic Generation ◽  
Polymer Membrane ◽  
Free Standing ◽  
Third Harmonic ◽  
Nonlinear Harmonic Generation ◽  
High Flexibility

Abstract Nonlinear harmonic generation in nanostructures is one of the key topics in nanophotonics, as it allows infrared-to-visible light conversion at the nanoscale.his work reports on the efficient third-harmonic generation in a free-standing Si nanowire array encapsulated into a polymer membrane. High nonlinearity of Si material X 31112.45 ≈ 10 –19m2 /V 2 and light coupling with optical resonances in the nanowires yield a strong third-harmonic signal and efficient infrared (1200 — 2000nm) to visible (400 — 666nm) upconversion. The fabricated membranes demonstrate high flexibility and semitransparency, which makes them convenient to use as visualizers.

scholarly journals Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3194
Author(s):  
Adrian Petris ◽  
Petronela Gheorghe ◽  
Tudor Braniste ◽  
Ion Tiginyanu
Keyword(s):  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Laser Pulses ◽  
Third Harmonic Generation ◽  
High Repetition Rate ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
High Repetition ◽  
Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

scholarly journals Energy exchange during third harmonic generation in multi-mode optical fibers

2021 ◽  
Vol 1859 (1) ◽  
pp. 012050
Author(s):  
Z Kasapeteva ◽  
A Dakova ◽  
V Slavchev ◽  
D Dakova ◽  
L Kovachev ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Harmonic Generation ◽  
Energy Exchange ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
Multi Mode
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