Topic
Step-index profile
About: Step-index profile is a research topic. Over the lifetime, 3104 publications have been published within this topic receiving 53199 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the authors studied the intersubband optical absorption coefficients and the refractive index changes in a V-groove quantum wire and used analytical expressions for these properties obtained by the compact-density matrix formalism.
Abstract: In this paper, the intersubband optical absorption coefficients and the refractive index changes are studied in a V-groove quantum wire. We use analytical expressions for these properties obtained by the compact-density matrix formalism. In this regard, the linear, nonlinear and total intersubband absorption coefficients and refractive index changes are investigated as a function of the bend width wire (b), the incident optical intensity (I), and the angle θ. According to the results obtained from the present work, it is deduced that: (i) The linear terms in the refractive index changes and absorption coefficients dose not change with incident optical intensity whereas nonlinear terms depend on incident optical intensity; (ii) The total refractive index changes and the absorption coefficients reduce as the incident optical intensity increases; (iii) The total absorption coefficient and refractive index changes increase and also shift toward higher energies as the bend width wire increases; and (iv) The total refractive index changes and absorption coefficients shift toward higher energies as the angle θ increases.
23 citations
01 Jul 1998-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: LiNbO 3, KTiOPO 4 (KTP) and Li 2 B 4 O 7 (LTB) are three materials presenting specific properties for electro-optic, second harmonic generation and acousto-optIC integrated applications, respectively.
Abstract: LiNbO 3 , KTiOPO 4 (KTP) and Li 2 B 4 O 7 (LTB) are three materials presenting specific properties for electro-optic, second harmonic generation and acousto-optic integrated applications, respectively. An optical characterization was therefore realized in each of them using the `dark m-lines' spectroscopy. From the angular guided modes spectra are calculated the effective refractive indices which values serve to construct the index profiles by an inverse WKB method. Shifts between index profiles falls were observed. We discuss those particular behaviors and explain them considering three parameters: the model to draw index profile, the experimental measurements and the ionic implantation effects.
23 citations
23 citations
Patent•
30 Sep 1998
TL;DR: In this article, the authors proposed a method to provide an antireflection film having a high ant-reflectivity function even if a transparent base having high refractive index is used.
Abstract: PROBLEM TO BE SOLVED: To provide an antireflection film having a high antireflection function even if a transparent base having a high refractive index is used. SOLUTION: The transparent base 1 having the refractive index of >=1.55, a primer coating layer 2 having the refractive index of >=1.55, a hard-coating layer 3 having the refractive index of >=1.55 and a low-refractive index layer 6 having the refractive index below 1.55 are laminated in this order. Both of a difference between the refractive index of the transparent base 1 and the refractive index of the primer coating layer 2 and a difference between the refractive index of the transparent base 1 and the refractive index of the hard- coating layer 3 are regulated to <=0.1.
23 citations
TL;DR: In this paper, the principal refractive indices of the biaxial cerium-doped LuxY2−xSiO5 (LYSO) crystal were determined with high accuracy at seven different wavelengths between 400 and 700 nm using the classical minimum angle of deviation method.
23 citations