Shape and size dependent nonlinear refraction and absorption in citrate-stabilized, near-IR plasmonic silver nanopyramids

2017 ◽  
Vol 16 (10) ◽  
pp. 1556-1562 ◽  
Author(s):  
Bhavesh Kumar Dadhich ◽  
Indrajit Kumar ◽  
Ravi Kant Choubey ◽  
Bhavya Bhushan ◽  
Amiya Priyam
Keyword(s):  
Refractive Index ◽  
Shape Change ◽  
Nonlinear Refraction ◽  
Edge Length ◽  
Size Dependent ◽  
Linear Refractive Index ◽  
Near Ir ◽  
Non Linear ◽  
Shape And Size

The shape change from 2D nanoplates to 3D nanopyramids reversed the sign of non-linear refractive index,n2, from negative to positive one. Amongst nanopyramids, as edge length increases,n2increases linearly.

scholarly journals Determination of non-linear refractive index of laser crystals and ceramics via different optical techniques

2020 ◽  
Vol 8 ◽  
pp. 100065
Author(s):  
Laurent Lamaignère ◽  
Guido Toci ◽  
Barbara Patrizi ◽  
Matteo Vannini ◽  
Angela Pirri ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Techniques ◽  
Linear Refractive Index ◽  
Non Linear ◽  
Laser Crystals

Study the Nonlinearity Characteristics of Organic-Semiconductor (CuPc) Prepared Via Pulsed Laser Deposition Technique with Different Thickness

2019 ◽  
Vol 27 ◽  
pp. 11-20 ◽  
Author(s):  
Mohammed T. Hussein ◽  
Reem R. Mohammed
Keyword(s):  
Refractive Index ◽  
Absorption Spectrum ◽  
Pulsed Laser Deposition ◽  
Copper Phthalocyanine ◽  
Wave Length ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Deposition Technique ◽  
Linear Refractive Index ◽  
Non Linear

The optical absorption spectrum, Photoluminesces, and non-linear optical properties for Copper Phthalocyanine (CuPc) thin films (150,300 and 450 nm) respectively have been investigated via pulsed laser deposition technique. The absorption spectrum indicted that there are two bands one in UV around 330 nm which called B-band and the second in Visible around 650nm which called Q-band. Photoluminescence spectrum related to deposit samples has been determined with different thicknesses. From closed and open aperture Z-scan data non-linear absorption coefficient and non-linear refractive index have been calculated respectively using He-Ne laser which have beam waist of (24.2 μm), wave-length of (632.8 nm) and Rayleigh thickness was 2.9 mm. Through dividing closed by open apertures, non-linear refractive index was calculated accurately. Finally, the study also showed the suitability of the deposited films as an optical limiter at the wavelength 632.8 nm.

A refractive index of a kink in curved space

2019 ◽  
Author(s):  
Miftachul Hadi
Keyword(s):  
Refractive Index ◽  
Curvature Tensor ◽  
Topological Charge ◽  
Winding Number ◽  
Linear Optics ◽  
Field Equations ◽  
Curved Space ◽  
Linear Refractive Index ◽  
Rank Tensor ◽  
Non Linear

The refractive index and curvature relation is formulated using the Riemann-Christoffel curvature tensor. As a consequence of the fourth rank tensor of the Riemann-Christoffel curvature tensor, we found that the refractive index should be a second rank tensor. The second rank tensor of the refractive index describes a linear optics. It implies naturally that the Riemann-Christoffel curvature tensor is related to the linear optics. In case of a non-linear optics, it implies that the refractive index is a sixth rank tensor, if susceptibility is a fourth rank tensor. The Riemann-Christoffel curvature tensor is still able to be formulated but with a reduction term. The relation between the (linear and non-linear) refractive index and (linear and non-linear) mass in curved space are formulated. Related to the Riemann-Christoffel curvature tensor, we formulate "the (linear and non-linear) generalized Einstein field equations". Sine-Gordon model in curved space is shown, where the Lagrangian is the total energy or mass of model. The mass of a kink (anti-kink) is shown, where it is associated with a topological charge. This topological charge is interpreted as a winding number. We formulate the relation between the (linear and non-linear) refractive index of the kink (anti-kink) and the topological charge-the winding number. Deflection of light is discussed in brief where the (linear and non-linear) angle of light deflection are formulated in relation with the mass (the topological charge, the winding number) of the kink (anti-kink).

scholarly journals The non-linear refractive index of colloidal PbSe nanocrystals: Spectroscopy and saturation behaviour

2006 ◽  
Vol 121 (2) ◽  
pp. 369-374 ◽  
Author(s):  
I. Moreels ◽  
P. Kockaert ◽  
R. Van Deun ◽  
K. Driesen ◽  
J. Loicq ◽  
...  
Keyword(s):  
Refractive Index ◽  
Linear Refractive Index ◽  
Non Linear
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