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Two-component solitons under a spatially modulated linear coupling: Inverted photonic crystals and fused couplers
Two-component solitons spatially modulated linear Inverted photonic crystals fused couplers Optics
2012/5/29
We study two-component solitons and their symmetry-breaking bifurcations (SBBs) in linearly coupled photonic systems with a spatially inhomogeneous strength of the coupling. One system models an inver...
Transmission Character of General Function Photonic Crystals
General Photonic crystals Dispersion relation Transmissivity
2012/5/29
In the paper, we present a new general function photonic crystals (GFPCs), which refractive index of medium is a arbitrary function of space position. Unlike conventional photonic crystals (PCs), whic...
Terahertz generation by optical rectification in uniaxial birefringent crystals
Terahertz generation optical rectification uniaxial birefringent crystals Optics
2012/5/28
The angular dependence of terahertz (THz) emission from birefringent crystals can differ significantly from that of cubic crystals. Here we consider optical rectification in uniaxial birefringent mate...
Spin-to-orbital momentum conversion via electrooptic Pockels effect in crystals
Spin-to-orbital momentum conversion electrooptic Pockels effect crystals
2011/8/3
Abstract: In the present work we have demonstrated a possibility for real-time operation by orbital an-gular momentum (OAM) of optical beams via Pockels effect in solid crystalline materials. Basing o...
Paraxial theory of sum-frequency generation by side-walk alignment and phase-matching in uniaxial crystals
non-linear optics, birefringence, sum-frequency generation
2011/9/5
A formalism in terms of Hertz potentials is presented describing sum-frequency generation in a uniaxial non-linear crystal. A scheme is proposed consisting in aligning the side-walk propagation of ext...
Progress towards fabrication of Th:229-doped high energy band-gap crystals for use as a solid-state optical frequency reference
Th:229-doped high energy band-gap crystals solid-state optical frequency
2010/11/12
We have recently described a novel method for the construction of a solid-state optical frequency reference based on doping $^{229}$Th into high energy band-gap crystals. Since nuclear transitions ar...
Photonic crystals are extremely sensitive to structural disorder even to the point of completely losing their functionalities. While on one side this can be detrimental for applications in traditiona...
In the paper, we present a new kind of function photonic crystals, which refractive index is a function of space position. Unlike conventional PCs, which structure grow from two materials, A and B, w...
Nonlinear thermotropic and thermo-optical behaviour of planar oriented textures in nematic liquid crystals at phase transitions
Liquid crystals Nematic Phase transitions Texture Optical transmission Optical birefringence
2010/6/30
Thermotropic, thermo-morphologic and thermo-optical properties of the planar oriented nematic liquid crystals have been investigated for large temperature interval and especially for the direct nemati...
Comparative Vibrational Spectra of Pilosine and Epiisopilosine crystals
Raman scattering infrared spectroscopy normal modes pilosine epiisopilosine
2010/6/30
This paper describes the study of two alkaloids extracted from Pilocarpus Microphyllus (Rutaceae): pilosine and epiisopilosine. These substances have potential application in the treatment of several ...
Vibrational Spectra of Pilocarpine Hydrochloride Crystals
Raman scattering infrared spectroscopy normal modes pilocarpine hydrochloride
2010/7/5
Pilocarpine is a natural substance with potential application in the treatment of several diseases. In this work Fourier Transform (FT)-Raman spectrum and the Fourier Transform infra red (FT-IR) spect...
Band gap structure of disordered chiral photonic crystals
Band gap s tructure Disorder Photonic c rystals
2013/7/3
Based o n the non-symmetric transmission-line method, the b and gap structure of disordered chiral photonic c rystals (CPC) has b een inve stigated. T he influence of the c hiral parameters, the disor...
Nonlinear Optical Properties of Some Newly Developed Crystals for Measurement of Ultrafast Laser Pulses
Second harmonic generation Vacuum ultraviolet generation Ultrafast pulse Measurement
2010/10/13
Second harmonic generation (SHG) in nonlinear optical crystal is well-established technique for the measurement of the pulse-width of ultrafast femtosecond laser pulses. However, only selected nonline...
Optical Absorption and Photoluminescence Measurements in InP and InP:Fe Bulk Crystals and Inspection of the Relations Between these Measurements
InP InP:Fe photoluminescence absorption semi-insulating band gap narrowing
2010/4/14
Optical absorption and photoluminescence (PL) measurements were carried out in both undoped and Fe-doped samples and the effect of Fe doping on absorption and PL spectra were studied. The results show...
Determination of Optical Constant of Materials by two Different Methods: An Application to Single Crystals Si
Optical Constant Si Single Crystals Oscillator Fit Procedure Kramers-Kronig Analysis
2010/4/15
The normal reflectance of single crystal Si was measured at 0.5 5.6 eV range by unpolarized light. Optical parameters of Si were determined from this reflectance data by using two different metho...