Thermo-optical nonlinearity of Fabry-Perot interferometer on cadmium diphosphide for linear polarized light

1992 ◽  
Author(s):  
Constantine F. Yeskin
Keyword(s):  
Polarized Light ◽  
Optical Nonlinearity ◽  
Fabry Perot ◽  
Cadmium Diphosphide

Optical Nonlinearity and Fast Switching in PbSnTe Fabry-Perot Etalon

1988 ◽  
Vol 150 (2) ◽  
pp. 729-733 ◽  
Author(s):  
P. P. Paskov ◽  
L. I. Pavlov ◽  
P. A. Atanasov ◽  
D. B. Kushev ◽  
N. N. Zheleva
Keyword(s):  
Optical Nonlinearity ◽  
Fast Switching ◽  
Fabry Perot

Compact Inline Resonant Photonic Crystal Fabry–Pérot Cavities for TM-Polarized Light

2011 ◽  
Vol 23 (4) ◽  
pp. 224-226 ◽  
Author(s):  
Ping Ma ◽  
Peter Kaspar ◽  
Patric Strasser ◽  
Yuriy Fedoryshyn ◽  
Heinz Jackel
Keyword(s):  
Photonic Crystal ◽  
Polarized Light ◽  
Fabry Perot

SELF-OSCILLATIONS OF AN OPTICALLY BISTABLE ELEMENT WITH VERY BROAD HYSTERESIS IN A HYBRID RING CAVITY

1992 ◽  
Vol 02 (04) ◽  
pp. 861-872 ◽  
Author(s):  
J. GROHS ◽  
F. ZHOU ◽  
H. IßLER ◽  
C. KLINGSHIRN
Keyword(s):  
Ring Cavity ◽  
Thermal Relaxation ◽  
Optical Nonlinearity ◽  
Light Signal ◽  
Thermally Induced ◽  
Large Numbers ◽  
Tree Construction ◽  
Reflected Light ◽  
Fabry Perot ◽  
Hybrid Ring

We investigate thermally induced optical nonlinearity of a glass doped with semiconductor quantum dots. With the feedback of a Fabry-Perot resonator this glass shows dispersive optical bistability. The reflected light signal is coupled to a hybrid ring cavity with a round trip time much longer than that of the Fabry-Perot resonator and even longer than the thermal relaxation time of the glass. The self-oscillations occurring for certain input parameters are regular and the appearance of different modes as a function of the light intensity coupled to the resonator is observed. Due to the broad hysteresis and the high inclination of both branches of the bistable loop we observe large numbers of ascending and descending steps in the output intensity, i.e., long oscillation periods. A simple model of adiabatic simulations by an iterated map shows that the mode structure follows a Farey-tree construction.

scholarly journals MEASURING THE MAGNETIC BIREFRINGENCE OF VACUUM: THE PVLAS EXPERIMENT

2012 ◽  
Vol 27 (15) ◽  
pp. 1260017 ◽  
Author(s):  
G. ZAVATTINI ◽  
U. GASTALDI ◽  
R. PENGO ◽  
G. RUOSO ◽  
F. DELLA VALLE ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Polarized Light ◽  
Nonlinear Electrodynamic ◽  
Test Setup ◽  
Magnetic Birefringence ◽  
Fabry Perot ◽  
The Status ◽  
Linearly Polarized ◽  
Physical Effects ◽  
High Finesse

We describe the principle and the status of the PVLAS experiment which is presently running at the INFN section of Ferrara, Italy, to detect the magnetic birefringence of vacuum. This is related to the QED vacuum structure and can be detected by measuring the ellipticity acquired by a linearly polarized light beam propagating through a strong magnetic field. Such an effect is predicted by the Euler–Heisenberg Lagrangian. The method is also sensitive to other hypothetical physical effects such as axion-like particles and in general to any fermion/boson millicharged particle. Here we report on the construction of our apparatus based on a high finesse (> 2·105) Fabry–Perot cavity and two 0.9 m long 2.5 T permanent dipole rotating magnets, and on the measurements performed on a scaled down test setup. With the test setup we have improved by about a factor 2 the limit on the parameter Ae describing nonlinear electrodynamic effects in vacuum: Ae < 2.9 · 10-21 T-2 @ 95% C.L.

scholarly journals Characterization of Birefringent Titanium-Oxide Thin Films Deposited by DC Sputtering

2017 ◽  
Vol 12 (1) ◽  
pp. 42-46
Author(s):  
H. P. De Araújo ◽  
S. G. Dos Santos Filho
Keyword(s):  
Thin Films ◽  
Titanium Oxide ◽  
Narrow Band ◽  
Polarized Light ◽  
Oxide Thin Films ◽  
Tio2 Thin Films ◽  
Dc Sputtering ◽  
Fabry Perot ◽  
Light Beams

This work presents the characterization of birefringent properties of titanium-oxide thin films using spectrophotometry and double-cavity Fabry-Perot structures. All films were deposited by DC sputtering over tilted substrates and the birefringence was characterized as a function of the deposition angle by the numerical difference between the refractive indexes for s- and p-polarized light beams. As a result, the highest value of birefringence (0.03) was obtained for samples tilted at 21º (having the normal axis as reference). A polarizing narrow-band Fabry-Perot filter centered at 400 and 700nm was designed by means of numerical simulations of the multilayer structures using a MATLAB© toolbox to solve the classical optical equations. Using this designed double-cavity Fabry-Perot structure [Ag(40nm) / TiO2(160nm) / Ag(40nm) / TiO2(164nm) / Ag(40nm)], transmittance ratios (Tp/Ts) for p- and s-polarized light beams resulted 1.70 at a wavelength of 699nm and 1.36 at another wavelength of 393nm (centers of the two narrow-band peaks), which corroborated the birefringent characteristics of the nearly-stoichiometric titania (TiO2) thin films.

scholarly journals Large optical nonlinearity enhancement under electronic strong coupling

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Kuidong Wang ◽  
Marcus Seidel ◽  
Kalaivanan Nagarajan ◽  
Thibault Chervy ◽  
Cyriaque Genet ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Nonlinear Optical ◽  
Response Times ◽  
Coupled System ◽  
Optical Nonlinearity ◽  
Cyanine Dye ◽  
Optical Fields ◽  
Optical Responses ◽  
Fabry Perot ◽  
Microscopic Interactions

AbstractNonlinear optical responses provide a powerful way to understand the microscopic interactions between laser fields and matter. They are critical for plenty of applications, such as in lasers, integrated photonic circuits, biosensing and medical tools. However, most materials exhibit weak optical nonlinearities or long response times when they interact with intense optical fields. Here, we strongly couple the exciton of cyanine dye J-aggregates to an optical mode of a Fabry-Perot (FP) cavity, and achieve an enhancement of the complex nonlinear refractive index by two orders of magnitude compared with that of the uncoupled condition. Moreover, the coupled system shows an ultrafast response of ~120 fs that we extract from optical cross-correlation measurements. The ultrafast and large enhancement of the optical nonlinar coefficients in this work paves the way for exploring strong coupling effects on various third-order nonlinear optical phenomena and for technological applications.

Strain effect on the optical nonlinearity in an InGaAs/GaAs asymmetric Fabry–Perot modulator

1993 ◽  
Vol 63 (4) ◽  
pp. 435-437 ◽  
Author(s):  
M. H. Moloney ◽  
J. F. Heffernan ◽  
J. Hegarty ◽  
R. Grey ◽  
J. Woodhead
Keyword(s):  
Optical Nonlinearity ◽  
Strain Effect ◽  
Fabry Perot

High Voltage Electron Microscopy of Ion-Milled Dental Enamel

1974 ◽  
Vol 32 ◽  
pp. 60-61
Author(s):  
L. D. Ackerman ◽  
S. H. Y. Wei
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Third Molar ◽  
Polarized Light ◽  
Dental Enamel ◽  
Longitudinal Section ◽  
Ion Milling ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron

Mature human dental enamel has presented investigators with several difficulties in ultramicrotomy of specimens for electron microscopy due to its high degree of mineralization. This study explores the possibility of combining ion-milling and high voltage electron microscopy as a means of circumventing the problems of ultramicrotomy.A longitudinal section of an extracted human third molar was ground to a thickness of about 30 um and polarized light micrographs were taken. The specimen was attached to a single hole grid and thinned by argon-ion bombardment at 15° incidence while rotating at 15 rpm. The beam current in each of two guns was 50 μA with an accelerating voltage of 4 kV. A 20 nm carbon coating was evaporated onto the specimen to prevent an electron charge from building up during electron microscopy.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

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