New Hierarchically Structured Optical Materials for Dynamic Refractive Index Changes

2003 ◽  
Author(s):  
Bradley F. Chmelka ◽  
Earl Danielson ◽  
Michael D. Wyrsta
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Index Changes

LINEAR AND NONLINEAR INTERSUBBAND OPTICAL ABSORPTION OF FINITE AND INFINITE SEMI-PARABOLIC QUANTUM WELLS

2011 ◽  
Vol 25 (07) ◽  
pp. 497-507 ◽  
Author(s):  
M. J. KARIMI ◽  
A. KESHAVARZ ◽  
A. POOSTFORUSH
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Optical Absorption ◽  
Quantum Well ◽  
Quantum Wells ◽  
Resonant Peak ◽  
Energy Eigenvalues ◽  
Finite Case ◽  
Infinite Case ◽  
Index Changes

In this work, the optical absorption coefficients and the refractive index changes for the infinite and finite semi-parabolic quantum well are calculated. Numerical calculations are performed for typical GaAs / Al x Ga 1-x As semi-parabolic quantum well. The energy eigenvalues and eigenfunctions of these systems are calculated numerically. Optical properties are obtained using the compact density matrix approach. Results show that the energy eigenvalues and the matrix elements of the infinite and finite cases are different. The calculations reveal that the resonant peaks of the optical properties of the finite case occur at lower values of the incident photon energy with respect to the infinite case. Results indicate that the maximum value of the refractive index changes for the finite case are greater than that of the infinite case. Our calculations also show that in contrast to the infinite case, the resonant peak value of the total absorption coefficient in the case of the finite well is a non-monotonic function of the semi-parabolic confinement frequency.

Optimal refractive index changes for cross-gain and cross-phase modulation

1998 ◽  
Author(s):  
Thomas Keating ◽  
Jeffrey R. Minch ◽  
Seoung-Hwan Park ◽  
Shun-Lien Chuang ◽  
Tawee Tanbun-Ek
Keyword(s):  
Refractive Index ◽  
Phase Modulation ◽  
Cross Phase Modulation ◽  
Index Changes

Refractive index changes of ion-implanted quartz

1983 ◽  
Vol 76 (2) ◽  
pp. K171-K174 ◽  
Author(s):  
H. Beez ◽  
D. Fasold ◽  
H. Karge
Keyword(s):  
Refractive Index ◽  
Index Changes ◽  
Ion Implanted

Local decomposition of solid solutions, nanostructures and optical materials with negative refractive index

2016 ◽  
Vol 30 (07) ◽  
pp. 1650088
Author(s):  
Valeriy M. Ishchuk ◽  
Vladimir Sobolev
Keyword(s):  
Refractive Index ◽  
Electric Conductivity ◽  
Solid Solutions ◽  
Lead Zirconate Titanate ◽  
Perovskite Structure ◽  
Optical Materials ◽  
Negative Refractive Index ◽  
Lead Zirconate ◽  
The State ◽  
Interphase Boundaries

In this paper, a possibility of use of the controlled decomposition of solid solutions of oxides with perovskite structure in the state of coexisting domains of the antiferroelectric (AFE) and ferroelectric (FE) phases for manufacturing materials with the negative refractive index is demonstrated. The lead zirconate titanate-based solid solutions are considered as an example of substances suitable for creation of such materials. Manufactured composites constitute a dielectric AFE matrix with a structure of conducting interphase boundaries separating domains of the FE and AFE phases. The electric conductivity of the interphase boundaries occurs as a result of the local decomposition of the solid solutions in the vicinity of these boundaries. The decomposition process and consequently the conductivity of the interphase boundaries can be controlled by means of external influences.

Polysilane-Based Thin Films with High Photosensitivity

2002 ◽  
Vol 726 ◽  
Author(s):  
K. Simmons-Potter ◽  
G. M. Jamison ◽  
B. G. Potter ◽  
W. J. Thomes ◽  
C. C. Phifer
Keyword(s):  
Refractive Index ◽  
Laser Exposure ◽  
Alkyl Aryl ◽  
Index Changes ◽  
Krf Excimer Laser ◽  
Intrinsic Photosensitivity ◽  
Optical Behavior ◽  
High Photosensitivity ◽  
Film Form ◽  
Limited Testing

AbstractThe present work investigates the intrinsic photosensitivity of a family of poly(alkyl)(aryl)silanes and poly(hydridophenyl)silane for use in the development of photoimprinted waveguide devices. Limited testing of passive optical behavior (e.g. absorption, refractive index) and photosensitive response was performed for these materials in thin film form. It was determined that the materials exhibited dramatic photobleaching under 248 nm (KrF excimer laser) exposure. Based on a Kramers-Kronig analysis of the absorption changes, refractive index changes on the order of - 0.1 are estimated. Confirmation of this calculation has been provided via ellipsometry which estimates refractive index changes at 632 nm of -0.14 ± 0.01. In addition, embedded strips have been photoimprinted into the material to confirm waveguiding capacity of the films. Possible sources of photosensitivity in this material and its potential for application in various device configurations will be discussed.

Development of Low-Cost Abbe Refractometer

2018 ◽  
Vol 879 ◽  
pp. 227-233
Author(s):  
Weeratouch Pongruengkiat ◽  
Thitika Jungpanich ◽  
Kodchakorn Ittipornnuson ◽  
Suejit Pechprasarn ◽  
Naphat Albutt
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Low Cost ◽  
Optical Component ◽  
Refractive Indices ◽  
Constant Number ◽  
Optical Wavelength ◽  
Refractive Index Spectrum ◽  
Transparent Polymers ◽  
Abbe Refractometer

Refractive index and Abbe number are major physical properties of optical materials including glasses and transparent polymers. Refractive index is, in fact, not a constant number and is varied as a function of optical wavelength. The full refractive index spectrum can be obtained using a spectrometer. However, for optical component designers, three refractive indices at the wavelengths of 486.1 nm, 589.3 nm and 656.3 nm are usually sufficient for most of the design tasks, since the rest of the spectrum can be predicted by mathematical models and interpolation. In this paper, we propose a simple optical instrumental setup that determines the refractive indices at three wavelengths and the Abbe number of solid and liquid materials.

Sign in / Sign up

Export Citation Format

Share Document