Amplification and second harmonic generation in non-linear fibre waveguides

1988 ◽  
Vol 20 (4) ◽  
pp. 339-342 ◽  
Author(s):  
K. I. White ◽  
B. K. Nayar ◽  
R. Kashyap
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Non Linear

Non-linear optical behavior of benzothiazole based chromophores: Second harmonic generation

2020 ◽  
Vol 183 ◽  
pp. 108739
Author(s):  
Shivani ◽  
Ishpreet Kaur ◽  
Karthika Chemmanghattu ◽  
Paramjit Kaur ◽  
Kamaljit Singh
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Non Linear ◽  
Linear Optical ◽  
Optical Behavior

scholarly journals [A3X][Ga3PS8] (A = K, Rb; X = Cl, Br): promising IR non-linear optical materials exhibiting concurrently strong second-harmonic generation and high laser induced damage thresholds

2016 ◽  
Vol 7 (9) ◽  
pp. 6273-6277 ◽  
Author(s):  
Bin-Wen Liu ◽  
Hui-Yi Zeng ◽  
Xiao-Ming Jiang ◽  
Guan-E Wang ◽  
Shu-Fang Li ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Optical Materials ◽  
Second Harmonic ◽  
High Laser ◽  
Non Linear ◽  
Nlo Materials ◽  
Linear Optical ◽  
Laser Induced Damage

We have developed a new series of salt-inclusion chalcogenides, which are promising IR-NLO materials exhibiting large second-harmonic generation and high laser-induced damage thresholds.

scholarly journals Disentangling Second Harmonic Generation from Multiphoton Photoluminescence in Halide Perovskites using Multidimensional Harmonic Generation

2020 ◽  
Author(s):  
Darien Morrow ◽  
Matthew Hautzinger ◽  
David Lafayette ◽  
Jason Scheeler ◽  
Lianna Dang ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Ferroelectric Properties ◽  
Excitation Frequency ◽  
Emission Feature ◽  
Ferroelectric Materials ◽  
Definitive Method ◽  
Non Linear ◽  
Halide Perovskites

Metal halide perovskites are an intriguing class of semiconductor materials being explored for their linear and non-linear optical, and potentially ferroelectric properties. In particular, layered two-dimensional Ruddlesden-Popper (RP) halide perovskites have shown non-linear optoelectronic properties. Optical second harmonic generation (SHG) is commonly used to screen for non-centrosymmetric and ferroelectric materials, however, SHG measurements of perovskites are complicated by their intense multiphoton photoluminescence (mPL) which can be mistaken for SHG signal. In this work, we introduce multidimensional harmonic generation as a method to eliminate the complications caused by mPL. By scanning and correlating both excitation and emission frequencies, we un-ambiguously assess whether a material supports SHG by examining if an emission feature scales as twice the excitation frequency. Careful multidimensional harmonic generation measurements of a series of n=2 and n=3 RP perovskites reveal that, contrary to previous belief, n-butylammonium (BA) RP perovskites display no SHG, thus they have inversion symmetry; but RP perovskites with phenylethylammonium (PEA) and 2-thiophenemethylammonium (TPMA) spacer cations display SHG. Multidimensional harmonic generation is also able to confirm the SHG and thus non-centrosymmetry of a recently reported ferroelectric RP perovskite even in the presence of an obscuring mPL background. This work establishes multidimensional harmonic generation as a definitive method to measure the SHG properties of materials and demonstrates that tuning organic cations can allow the design of new non-centrosymmetric or even ferroelectric RP perovskites.<br>

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