Linear optical properties and second-harmonic generation from ultrathin niobium films: A search for quantization effects

1995 ◽  
Vol 31 (11) ◽  
pp. 2044-2051 ◽  
Author(s):  
A.V. Zayats ◽  
O. Keller ◽  
K. Pedersen ◽  
A. Liu ◽  
F.A. Pudonin
Keyword(s):  
Optical Properties ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Linear Optical Properties ◽  
Linear Optical

scholarly journals Quantum Confined Stark Effect on the Linear and Nonlinear Optical Properties of SiGe/Si Semi Oblate and Prolate Quantum Dots Grown in Si Wetting Layer

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1513
Author(s):  
Varsha ◽  
Mohamed Kria ◽  
Jawad El Hamdaoui ◽  
Laura M. Pérez ◽  
Vinod Prasad ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Dot ◽  
Electric Field ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Wetting Layer ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical

We have studied the parallel and perpendicular electric field effects on the system of SiGe prolate and oblate quantum dots numerically, taking into account the wetting layer and quantum dot size effects. Using the effective-mass approximation in the two bands model, we computationally calculated the extensive variation of dipole matrix (DM) elements, bandgap and non-linear optical properties, including absorption coefficients, refractive index changes, second harmonic generation and third harmonic generation as a function of the electric field, wetting layer size and the size of the quantum dot. The redshift is observed for the non-linear optical properties with the increasing electric field and an increase in wetting layer thickness. The sensitivity to the electric field toward the shape of the quantum dot is also observed. This study is resourceful for all the researchers as it provides a pragmatic model by considering oblate and prolate shaped quantum dots by explaining the optical and electronic properties precisely, as a consequence of the confined stark shift and wetting layer.

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 L-alaninium perrhenate: crystal structure and non-linear optical properties

2014 ◽  
Vol 12 (10) ◽  
pp. 1016-1022 ◽  
Author(s):  
Vitor Rodrigues ◽  
Maria Costa ◽  
Etelvina Gomes ◽  
Dmitry Isakov ◽  
Michael Belsley
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Second Harmonic ◽  
Negative Ions ◽  
Damage Threshold ◽  
Linear Optics ◽  
Second Harmonic Generation Efficiency ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical

AbstractThe crystal structure and non-linear optical properties of L-alaninium perrhenate, C3H8NO2+ ReO4 −, are reported. The protonated amino acid and the perrhenate anion have their usual geometries. The three-dimensional hydrogen-bonded network can be seen as a stacking of layers parallel to the (100) planes. Each layer is formed by chains of alternating positive and negative ions along the b and c axes. Hydrogen bonding of adjacent layers forms alternating chains along the a axis. A high damage threshold and a second-harmonic generation efficiency three times that of KDP make this new material potentially useful in non-linear optics.

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