The interaction of light with noble metal nanoparticles deposited onto the top surface of a semiconductor has been investigated using the finite-difference time-domain method. The scattering is calculated for spherical and hemispherical silver nanoparticles placed in a periodic two-dimensional array on the upper surface of a semi-infinite silicon substrate. The results show that the contact area between hemispherical particles and the silicon significantly reduces the forward scattering. The use of an oxide buffer layer to separate the particle from the semiconductor is investigated and is seen to be important if the forward scattering of light is to be enhanced.
© 2009 Optical Society of America
Original Manuscript: September 14, 2009
Revised Manuscript: November 11, 2009
Manuscript Accepted: November 17, 2009
Published: December 31, 2009
Anthony Centeno, Jonathan Breeze, Badar Ahmed, Hari Reehal, and Neil Alford, "Scattering of light into silicon by spherical and hemispherical silver nanoparticles," Opt. Lett. 35, 76-78 (2010)