Applications of Nonlinear Optical Thin Films

1994 ◽  
Vol 341 ◽  
Author(s):  
S. R. J. Brueck ◽  
R. A. Myers
Keyword(s):  
Nonlinear Optical ◽  
Strong Field ◽  
Fused Silica ◽  
Inorganic Materials ◽  
Strong Nonlinearity ◽  
Temperature Dependent ◽  
Inorganic Films ◽  
Major Factors ◽  
Ion Species ◽  
Oxygen Bond

AbstractMany approaches to fabrication of nonlinear optical and electro-optical thin-film materials are currently under investigation including: epitaxial inorganic films; polycrystalline inorganic materials; organic nonlinear moieties poled in polymer hosts; and poled amorphous inorganic materials. For each of these approaches there are a variety of characteristics and constraints that impact the ultimate uses. These are discussed in the context of signal processing and transmission applications such as optical interconnects and integrated optics. Almost universally, integration with the Si materials and processing that dominates current computer technology, or with the III-V materials that dominate optoelectronics technology, are major factors in the attractiveness of a technology direction. A relatively recent development is the observation of a strong nonlinearity in fused silica, χ(2) ∼ 1 pm/V, poled by modest temperature and electric-field stress. Temperature-dependent dynamic and spectroscopic measurements suggest that mobile-ion species such as Na+, as well as non-bridging oxygen bond re-orientation under a strong field, play a role in the nonlinearity.

scholarly journals Single-shot imaging of surface molecular ionization in nanosystems

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Fenghao Sun ◽  
Hui Li ◽  
Shanshan Song ◽  
Fei Chen ◽  
Jiawei Wang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Strong Field ◽  
Imaging Technique ◽  
Near Field ◽  
Velocity Map Imaging ◽  
Single Shot ◽  
Surface Molecules ◽  
Nanoparticle Interactions ◽  
Field Response ◽  
Ion Species

Abstract Using single-shot velocity map imaging technique, explosion imaging of different ion species ejected from 50 nm SiO2 nanoparticles are obtained excitedly by strong near-infrared and ultraviolet femtosecond laser fields. Characteristic momentum distributions showing forward emission of the ions at low excitation intensities and shock wave behaviors at high intensities are observed. When the excitation intensity is close to the dissociative ionization threshold of the surface molecules, the resulting ion products can be used to image the instant near-field distributions. The underlying dynamics of shock formation are simulated by using a Coulomb explosion model. Our results allow one to distinguish the ultrafast strong-field response of various molecular species in nanosystems and will open a new way for further exploration of the underlying dynamics of laser-and-nanoparticle interactions.

scholarly journals A Molecular Architectural Approach to Second-Order Nonlinear Optical Materials

1995 ◽  
Vol 392 ◽  
Author(s):  
Xiaoguang Yang ◽  
Duncan McBranch ◽  
Basil Swanson ◽  
Dequan Li
Keyword(s):  
Nonlinear Optical ◽  
Second Harmonic ◽  
Fused Silica ◽  
Second Order ◽  
Nonlinear Susceptibility ◽  
Design And Synthesis ◽  
Fundamental Wavelength ◽  
Assembled Monolayers ◽  
Methylene Groups ◽  
Nlo Chromophores

AbstractThe design and synthesis of a family of calix[4]arene-based nonlinear optical (NLO) chromophores are discussed. The calixarene chromophores are macrocyclic compounds consisting of four simple D-π-A units bridged by methylene groups. These molecules were synthesized such that four D-π-A units of the calix[4]arene were aligned along the same direction with the calixarene in a cone conformation. These nonlinear optical super-chromophores were subsequently fabricated into covalently bound self-assembled monolayers on the surfaces of fused silica and silicon. Spectroscopic second harmonic generation (SHG) measurements were carried out to determine the absolute value of the dominant element of the second-order nonlinear susceptibility, d33, and the average molecular alignment, ψ. We find a value of d33 = 60 pm/V at a fundamental wavelength of 890 nm, and ψ˜ 36° with respect to the surface normal.

Linear and nonlinear optical response of bismuth and antimony implanted fused silica: annealing effects

1995 ◽  
Vol 4 (6) ◽  
pp. 675-684 ◽  
Author(s):  
Z. Pan ◽  
S.H. Morgan ◽  
D.O. Henderson ◽  
S.Y. Park ◽  
R.A. Weeks ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Response ◽  
Fused Silica ◽  
Nonlinear Optical Response ◽  
Annealing Effects ◽  
Linear And Nonlinear

Ultrafast Photon-Electron Interactions in Dielectrics by a Single Laser Pulse

2004 ◽  
Author(s):  
L. Jiang ◽  
H. L. Tsai
Keyword(s):  
Laser Pulse ◽  
Impact Ionization ◽  
Fused Silica ◽  
Ablation Depth ◽  
Ultrafast Laser ◽  
Quantum Mechanical ◽  
Free Electrons ◽  
Electron Generation ◽  
Major Factors ◽  
Crater Shape

This study develops a quantum mechanical model to investigate energy absorption in ultrafast laser of dielectrics. The model investigates the optical property variations, electron temperature, and density changes at femtosecond scales. The ionizations and electron heating are two major factors considered for pulse absorption occurring within the pulse duration. The flux-doubling model is employed to calculate the free electron generation mainly through impact ionization and photoionization. The quantum mechanical treatments are used to account for the specific heat and the relaxation time for free electrons. The time and space dependent optical properties of the dense plasma generated by the ultrafast laser pulse are calculated. The predictions of ablation threshold and ablation depth of fused silica and barium aluminum borosilicate (BBS) are in good agreements with published experimental data. The model greatly improves the accuracy in predicting the ablation depth and can predict the crater shape.

Application of radiative renormalization to strong-field resonant nonlinear optical interactions

1993 ◽  
Vol 47 (6) ◽  
pp. 5165-5179 ◽  
Author(s):  
O. Blum ◽  
P. Harshman ◽  
T. K. Gustafson ◽  
P. L. Kelley
Keyword(s):  
Nonlinear Optical ◽  
Strong Field

Spectroscopic study of l-arginine interaction with potassium dihydrogen phosphate crystals

2009 ◽  
Vol 24 (7) ◽  
pp. 2316-2320 ◽  
Author(s):  
Jayesh R. Govani ◽  
William G. Durrer ◽  
Marian Manciu ◽  
Cristian Botez ◽  
Felicia S. Manciu
Keyword(s):  
Infrared Absorption ◽  
Nonlinear Optical ◽  
Potassium Dihydrogen Phosphate ◽  
Inorganic Materials ◽  
Dihydrogen Phosphate ◽  
Amino Group ◽  
Nonlinear Optical Material ◽  
Potassium Dihydrogen ◽  
Evaporation Technique ◽  
Infrared Absorption Spectra

Inorganic potassium dihydrogen phosphate (KDP) is widely known for its value as a nonlinear optical material. In this study, pure and l-arginine–doped KDP single crystals were grown by the slow solvent evaporation technique and further subjected to infrared absorption and Raman studies for the confirmation of chemical group functionalization and possible bonding between the organic and inorganic materials. The appearance in the infrared absorption spectra of additional vibrational lines, which mostly originate from disturbed N–H, C–H, and C–N bonds of the l-arginine–doped salt, confirm the interaction between KDP and the organic material. This affirmation is supported by more evidence from Raman measurements, where the disappearance of NH vibrations of the amino group is observed. We are thus led to the possibility of hydrogen bonding primarily between the nucleophilic O− of the phosphate unit of KDP and the amino group of the l-arginine.

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