Gaussian beam scattering from spheres using morphology-dependent resonances

Philip A. Moortgat; Jian-Xiang Zhang; Pamela M. Aker

doi:10.1117/12.221489

25 September 1995 Gaussian beam scattering from spheres using morphology-dependent resonances

Philip A. Moortgat, Jian-Xiang Zhang, Pamela M. Aker

Proceedings Volume 2547, Laser Techniques for Surface Science II; (1995) https://doi.org/10.1117/12.221489
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Electromagnetic (EM) radiation propagating inside a dielectric particle will develop standing waves if certain boundary conditions are satisfied. The boundary conditions depend on, among other things, the shape of the particle. The standing-wave solutions are widely referred to as morphology-dependent resonances (MDRs). If MDR conditions are satisfied then the intensity of the electric field can be calculated everywhere inside the particle. It has been found that for certain MDR modes in micron-sized spheres the EM field strength is localized close to the particle surface. Energy can be transferred into these MDRs through Gaussian laser beam scattering from the sphere, and the energy becomes trapped in a semi-bound state. The localization and increased lifetimes of MDRs allows them to be used in stimulated Raman scattering experiments. Calculations have shown that the maximum energy is transferred into the MDR when the laser is focused outside the sphere surface. This paper analyzes the internal and external radial wavefunctions involved in the scattering to determine the optimum position of the Gaussian beam.

Citation Download Citation

Philip A. Moortgat, Jian-Xiang Zhang, and Pamela M. Aker "Gaussian beam scattering from spheres using morphology-dependent resonances", Proc. SPIE 2547, Laser Techniques for Surface Science II, (25 September 1995); https://doi.org/10.1117/12.221489

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available