Growth, Microstructures and Optical Properties of KNbO3 Thin Films

1993 ◽  
Vol 310 ◽  
Author(s):  
Thomas M. Graettinger ◽  
P. A. Morris ◽  
R. R. Woolcotit ◽  
F. C. Zumsteg ◽  
A. F. Chow ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Frequency Conversion ◽  
Growth Parameters ◽  
Ion Beam ◽  
Optical Loss ◽  
Epitaxial Thin Films ◽  
Epitaxial Relationship ◽  
Visible Wavelength Range

AbstractPotassium niobate, KNbO3, possesses high nonlinear optical coefficients making it a promising material for frequency conversion into the visible wavelength range. While epitaxial thin films of KNbO3 have been reported [1,2], only limited data exists concerning the optical loss mechanisms and nonlinear optical properties of these films. In this study, epitaxial thin films of KNbO3 have been grown using ion beam sputter deposition and evaluated in terms of their microstructures and optical properties. Characterization of the microstructures of these films includes the in-plane epitaxial relationship to the substrate. The relationships between the growth parameters and microstructures developed to the indices of refraction and the optical losses (absorption and scattering) are discussed.

Epitaxial Niobate Thin Films and Their Nonlinear Optical Properties

1995 ◽  
Vol 401 ◽  
Author(s):  
B. W. Wessels ◽  
M. J. Nystrom ◽  
J. Chen ◽  
D. Studebaker ◽  
T. J. Marks
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Chemical Vapor ◽  
Nonlinear Optical Properties ◽  
Organic Chemical ◽  
Epitaxial Thin Films ◽  
Non Linear ◽  
Metal Organic ◽  
Linear Optical

AbstractFerroelectric oxide thin films show considerable potential as electro-optic and non-linear optical materials. Of particular interest are the niobates such as strontium barium niobate and potassium niobate. The growth of these epitaxial oxide films by metal-organic chemical vapor deposition (MOCVD) has been investigated. This technique has yielded epitaxial thin films with excellent non-linear optical properties. Issues concerning the epitaxy of these thin films and its relationship to their optical and nonlinear optical properties are discussed.

Ion-Beam-Assisted Deposition of Metal Nanocluster thin Films with Nonlinear Optical Properties

1995 ◽  
Vol 396 ◽  
Author(s):  
C. M. Cotell ◽  
C.A. Carosella ◽  
S.R. Flom ◽  
S. Schiestel ◽  
N. Haralampus ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Uv Spectroscopy ◽  
Ion Beam ◽  
Ion Bombardment ◽  
Plan View ◽  
Ion Beam Assisted Deposition ◽  
Metal Nanocluster ◽  
Post Deposition

AbstractMetal nanocluster thin films (∼200 nm thickness) consisting of noble metal (Au) clusters (5-30 nm) in an active metal oxide (Nb2O5) matrix were deposited by evaporation or ion beam assisted deposition (IBAD). In some cases the films were given a post-deposition anneal. The microstructure of the films was examined by plan view and cross sectional transmission electron microscopy (TEM). The size of the metal nanoclusters was found to depend upon the temperature of the post-deposition anneal as well as the conditions of ion bombardment. Ion bombardment was found to stabilize smaller size particles. The linear optical properties of the films, as measured by VIS/UV spectroscopy, show particle size-dependent surface plasmon resonance effects. The nonlinear optical (NLO) properties of the nanoclusters in oxidized niobium were probed experimentally using degenerate four wave mixing (DFWM) and nonlinear transmission (NLT). The DFWM measurements yielded signals that showed strong evidence of saturation and give large values of χ(3)xxxxl. NLT measurements demonstrated that the nonlinear absorption coefficient and, hence, Imχ(3)xxxx was negative. Time resolved DFWM measurements exhibited dynamics that decayed on a several picosecond time scale. The magnitude and the picosecond dynamics of the NLO response were compared to those observed in gold nanoclusters formed by ion implantation in other media. The advantages of the IBAD method for fabricating third order NLO films include the ability to deposit films of arbitrary active region thicknesses and, more importantly, high cluster densities.

scholarly journals Nonlinear optical properties of calcium barium niobate epitaxial thin films

2016 ◽  
Vol 24 (15) ◽  
pp. 17497 ◽  
Author(s):  
Stéphane Bancelin ◽  
Sébastien Vigne ◽  
Nadir Hossain ◽  
Mohammed Chaker ◽  
François Légaré
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Epitaxial Thin Films

Growth of Epitaxial KNbO3 Thin Films

1994 ◽  
Vol 341 ◽  
Author(s):  
Thomas M. Graettinger ◽  
P. A. Morris ◽  
A. Roshko ◽  
A. I. Kingon ◽  
O. Auciello ◽  
...  
Keyword(s):  
Thin Films ◽  
Frequency Conversion ◽  
Lattice Mismatch ◽  
Ion Beam ◽  
Growth Conditions ◽  
Infrared Light ◽  
Epitaxial Thin Films ◽  
Ion Beam Sputtering ◽  
Beam Sputtering ◽  
Ion Assistance

AbstractKNbO3 possesses high nonlinear optical coefficients making it a promising material for frequency conversion of infrared light into the visible wavelength range using integrated optical devices. While epitaxial thin films of KNbO3 have previously been grown using ion beam sputtering, defects (i.e. grain boundaries, domains, surface roughness) in these films resulted in high optical losses and no measurable in-plane birefringence. Previous films were grown on MgO substrates, which have a >4% lattice mismatch with KNbO3. In the work reported here, we have grown films on MgO, MgA12O4, NdGaO3, and KTaO3 to investigate the role of lattice mismatch on the resulting film quality. Films have also been grown with and without oxygen ion assistance. The orientations, morphologies, and defects in the films were examined using x-ray diffraction and AFM to determine their relationships to the growth conditions and substrate lattice mismatch.

Ion Beam Sputter Deposition Of Ferroelectric Oxide Thin Films

1991 ◽  
Vol 223 ◽  
Author(s):  
Thomas M. Graettinger ◽  
O. Auciello ◽  
M. S. Ameen ◽  
H. N. Al-Shareef ◽  
K. Gifford ◽  
...  
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Growth Parameters ◽  
Ion Beam ◽  
Lead Zirconate ◽  
Electro Optic ◽  
Integrated Optical ◽  
Pzt Films ◽  
Ion Beam Sputter Deposition ◽  
Ferroelectric Oxide

ABSTRACTFerroelectric oxide films have been studied for their potential application as integrated optical materials and nonvolatile memories. Electro-optic properties of potassium niobate (KNbO3) thin films have been measured and the results correlated to the microstructures observed. The growth parameters necessary to obtain single phase perovskite lead zirconate titanate (PZT) thin films are discussed. Hysteresis and fatigue measurements of the PZT films were performed to determine their characteristics for potential memory devices.

scholarly journals High performing flexible optoelectronic devices using thin films of topological insulator

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Animesh Pandey ◽  
Reena Yadav ◽  
Mandeep Kaur ◽  
Preetam Singh ◽  
Anurag Gupta ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Near Infrared ◽  
Optoelectronic Devices ◽  
Nonlinear Optical Properties ◽  
Metallic Surface ◽  
Strong Light ◽  
High Performing ◽  
Decay Times

AbstractTopological insulators (TIs) possess exciting nonlinear optical properties due to presence of metallic surface states with the Dirac fermions and are predicted as a promising material for broadspectral phodotection ranging from UV (ultraviolet) to deep IR (infrared) or terahertz range. The recent experimental reports demonstrating nonlinear optical properties are mostly carried out on non-flexible substrates and there is a huge demand for the fabrication of high performing flexible optoelectronic devices using new exotic materials due to their potential applications in wearable devices, communications, sensors, imaging etc. Here first time we integrate the thin films of TIs (Bi2Te3) with the flexible PET (polyethylene terephthalate) substrate and report the strong light absorption properties in these devices. Owing to small band gap material, evolving bulk and gapless surface state conduction, we observe high responsivity and detectivity at NIR (near infrared) wavelengths (39 A/W, 6.1 × 108 Jones for 1064 nm and 58 A/W, 6.1 × 108 Jones for 1550 nm). TIs based flexible devices show that photocurrent is linearly dependent on the incident laser power and applied bias voltage. Devices also show very fast response and decay times. Thus we believe that the superior optoelectronic properties reported here pave the way for making TIs based flexible optoelectronic devices.

Nonlinear optical properties of poly(methyl methacrylate) thin films doped with Bixa Orellana dye

2015 ◽  
Vol 340 ◽  
pp. 72-77 ◽  
Author(s):  
S. Zongo ◽  
A.P. Kerasidou ◽  
B.T. Sone ◽  
A. Diallo ◽  
P. Mthunzi ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Methyl Methacrylate ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Bixa Orellana ◽  
Poly Methyl Methacrylate
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