Birefringence in optical waveguides made by silicon nanocrystal superlattices

Riboli, F.; Navarro-Urrios, D.; Chiasera, A.; Daldosso, N.; Pavesi, L.; Oton, C. J.; Heitmann, J.; Yi, L. X.; Scholz, R.; Zacharias, M.
August 2004
Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1268
Academic Journal
We investigate the optical properties of planar waveguides where the core layer is formed by a silicon nanocrystals (Si-nc)/SiO2 superlattice. M-line measurements of the different waveguides yield the mode indices, which can be modeled by assuming anisotropic optical properties of the core layer. This anisotropy is related to the superlattice, i.e., it is a form birefringence. By modeling the m-line measurements with the structural data obtained by transmission electron microscopy analysis, we determine for each waveguide the value of the form birefringence, an upper limit of the nanocrystals size and their refractive index. Values of the form birefringence as high as 1% have been found.


Related Articles

  • Simple low-loss waveguide bends using ARROW effect. Galarza, M.; Moreno, J.; Lopez-Amo, M.; Christiaens, I.; Van Thourhout, D.; Baets, R. // Applied Physics B: Lasers & Optics;May2005, Vol. 80 Issue 6, p745 

    A new concept for reducing bend loss in dielectric planar waveguides is presented. It is based on the introduction of a set of antiresonant reflecting optical waveguides (ARROWs) on the outside of the bent core and defined in the same fabrication step as the main bend. It has been ascertained by...

  • Bends and splitters in metal-dielectric-metal subwavelength plasmonic waveguides. Veronis, Georgios; Fan, Shanhui // Applied Physics Letters;9/26/2005, Vol. 87 Issue 13, p131102 

    We investigate the performance of bends and splitters in metal-dielectric-metal subwavelength plasmonic waveguides. We show that bends and splitters with no additional loss over a very wide frequency range can be designed for metal-dielectric-metal waveguides with center layer thickness small...

  • Strong photoabsorption by a single-quantum wire in waveguide-transmission spectroscopy. Takahashi, Yasushi; Hayamizu, Yuhei; Itoh, Hirotake; Yoshita, Masahiro; Akiyama, Hidefumi; Pfeiffer, Loren N.; West, Ken W. // Applied Physics Letters;6/13/2005, Vol. 86 Issue 24, p243101 

    We measured the absorption spectrum of a single T-shaped 14×6 nm lateral-sized quantum wire embedded in an optical waveguide using waveguide-transmission spectroscopy at 5 K. In spite of its small volume, the one-dimensional-exciton ground state shows a large absorption coefficient of 80...

  • Growing evanescent waves in a cutoff rectangular waveguide loaded with an inductive iris and a capacitive post. Stickel, Micah; Eleftheriades, George V. // Journal of Applied Physics;6/15/2005, Vol. 97 Issue 12, p124910 

    There has been much interest recently in the area of engineered materials with unusual electromagnetic properties known as metamaterials. Of particular interest are those metamaterials that are characterized by a negative refractive index (NRI). The existence of growing evanescent waves is one...

  • Waveguide array-grating compressors. Droulias, Sotiris; Hizanidis, Kyriakos; Christodoulides, Demetrios N.; Morandotti, Roberto // Applied Physics Letters;9/26/2005, Vol. 87 Issue 13, p131104 

    We show that efficient optical pulse compression can be achieved when normally dispersive nonlinear waveguide arrays are used in conjunction with dispersive elements such as gratings or other programmable phase filters. Our computations indicate that the compression resulting from such discrete...

  • Compact-2D FDTD for waveguides including materials with negative dielectric permittivity, magnetic permeability and refractive index. Pile, D. F. P. // Applied Physics B: Lasers & Optics;Sep2005, Vol. 81 Issue 5, p607 

    An efficient compact-2D finite-difference time-domain method is presented for the numerical analysis of guided modes in waveguides that may include negative dielectric permittivity, negative magnetic permeability and negative refractive index materials. Both complex variable and real variable...

  • Coupled dielectric waveguides: variational estimations. Melnichuk, O. P.; Popov, I. Yu. // Journal of Mathematical Physics;Jul2005, Vol. 46 Issue 7, p073501 

    Two dielectric waveguides coupled through small windows are considered. In the case of single coupling window we prove the existence of an eigenvalue below the threshold. It’s estimation is obtained. If there is the periodic set of coupling windows a band below the threshold exists. Using...

  • Wide-band transmittance of one-dimensional photonic crystals carved in Si3N4/SiO2 channel waveguides. Gerace, D.; Galli, M.; Bajoni, D.; Guizzetti, G.; Andreani, L. C.; Riboli, F.; Melchiorri, M.; Daldosso, N.; Pavesi, L.; Pucker, G.; Cabrini, S.; Businaro, L.; di Fabrizio, E. // Applied Physics Letters;11/21/2005, Vol. 87 Issue 21, p211116 

    Experimental and theoretical investigations of photonic crystal (PhC) structures in silicon nitride/silicon dioxide (Si3N4/SiO2) vertical waveguiding geometry are reported. One-dimensional patterns, either periodic or with cavity layers, are carved onto the channel waveguides by using focused...

  • Dispersion-controlled optical group delay device by chirped photonic crystal waveguides. Mori, Daisuke; Baba, Toshihiko // Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1101 

    Previously, we proposed and demonstrated chirped photonic crystal waveguides, in which some structural parameters are gradually changed so that the photonic band characteristic is smoothly shifted. In this letter, we discuss an optical delay line composed of two index-chirped waveguides in a...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics