Activation of blue emission from oxidized porous silicon by annealing in water vapor

1998 ◽  
Vol 83 (3) ◽  
pp. 1776-1778 ◽  
Author(s):  
Hideki Koyama ◽  
Yuka Matsushita ◽  
Nobuyoshi Koshida
Keyword(s):  
Water Vapor ◽  
Porous Silicon ◽  
Blue Emission ◽  
Oxidized Porous Silicon

Comparative Optical Studies of Chemically Synthesized Silicon Nanocrystals

1996 ◽  
Vol 452 ◽  
Author(s):  
Gildardo R. Delgado ◽  
Howard W.H. Lee ◽  
Susan M. Kauzlarich ◽  
Richard A. Bley
Keyword(s):  
Porous Silicon ◽  
Silicon Nanocrystals ◽  
Surface Passivation ◽  
Theoretical Calculations ◽  
Dominant Role ◽  
Blue Emission ◽  
Surface States ◽  
Si Nanocrystals ◽  
Optical And Electronic Properties ◽  
Passivation Layers

AbstractWe studied the optical and electronic properties of silicon nanocrystals derived from two distinct fabrication procedures. One technique uses a controlled chemical reaction. In the other case, silicon nanocrystals are produced by ultrasonic fracturing of porous silicon layers. We report on the photoluminescence, photoluminescence excitation, and absorption spectroscopy of various size distributions derived from these techniques. We compare the different optical properties of silicon nanocrystals made this way and contrast them with that observed in porous silicon. Our results emphasize the dominant role of surface states in these systems as manifested by the different surface passivation layers present in these different fabrication techniques. Experimental absorption measurements are compared to theoretical calculations with good agreement. Our results provide compelling evidence for quantum confinement in both types of Si nanocrystals. Our results also indicate that the blue emission from very small Si nanocrystals corresponds to the bandedge emission, while the red emission arises from traps.

scholarly journals Anisotropic polarization memory in thermally oxidized porous silicon

2000 ◽  
Vol 77 (15) ◽  
pp. 2316-2318 ◽  
Author(s):  
Hideki Koyama ◽  
Philippe M. Fauchet
Keyword(s):  
Porous Silicon ◽  
Oxidized Porous Silicon

Optical gain in dye-doped polymer waveguides using oxidized porous silicon cladding

2007 ◽  
Author(s):  
Daniel Navarro-Urrios ◽  
Mher Ghulinyan ◽  
Paolo Bettotti ◽  
Néstor Capuj ◽  
Claudio J. Oton ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Optical Gain ◽  
Polymer Waveguides ◽  
Oxidized Porous Silicon ◽  
Doped Polymer

Observation of quantum-confined luminescence in partially oxidized porous silicon

2000 ◽  
Vol 80 (4) ◽  
pp. 679-689 ◽  
Author(s):  
Giampiero Amato ◽  
L. Boarino ◽  
D. Midellino ◽  
A. M. Rossi
Keyword(s):  
Porous Silicon ◽  
Oxidized Porous Silicon ◽  
Quantum Confined

Strongly Superlinear Light Emission and Large Induced Absorption in Oxidized Porous Silicon Films

1998 ◽  
Vol 536 ◽  
Author(s):  
H. Koyama ◽  
P. M. Fauchet
Keyword(s):  
Porous Silicon ◽  
Thermal Effects ◽  
Light Emission ◽  
Laser Intensity ◽  
Excitation Intensity ◽  
Silicon Films ◽  
Free Standing ◽  
Induced Absorption ◽  
Cw Laser ◽  
Oxidized Porous Silicon

AbstractThe optical properties of oxidized free-standing porous silicon films excited by a cw laser have been investigated. It is found that samples oxidized at 800–950 °C show a strongly superlinear light emission at an excitation intensity of ∼10 W/cm2. This emission has a peak at 900–1100 nm and shows a blueshift as the oxidation temperature is increased. These samples also show a very large induced absorption, where the transmittance is found to decrease reversibly by ≤99.7 %.The induced absorption increases linearly with increasing pump laser intensity. Both the superlinear emission and the large induced absorption are quenched when the samples are attached to materials with a higher thermal conductivity, suggesting that laser-induced thermal effects are responsible for these phenomena.

Using an oxidized porous silicon interferometer for determination of relative protein binding affinity through non-covalent capture probe immobilization

2007 ◽  
Vol 204 (5) ◽  
pp. 1444-1448 ◽  
Author(s):  
Michael P. Schwartz ◽  
Christine Yu ◽  
Sara D. Alvarez ◽  
Benjamin Migliori ◽  
Denis Godin ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Protein Binding ◽  
Binding Affinity ◽  
Capture Probe ◽  
Oxidized Porous Silicon

Visible Photoluminescence from Anodically Oxidized Porous Silicon

1994 ◽  
Vol 33 (Part 2, No. 7A) ◽  
pp. L941-L944 ◽  
Author(s):  
Toshimichi Ito ◽  
Kenji Motoi ◽  
Osamu Arakaki ◽  
Akimitsu Hatta ◽  
Akio Hiraki
Keyword(s):  
Porous Silicon ◽  
Visible Photoluminescence ◽  
Oxidized Porous Silicon
Sign in / Sign up

Export Citation Format

Share Document