Self-consistent optomechanical trapping, strain, and deformation of elastic dielectrica

M. Sonnleitner; M. Ritsch-Marte; H. Ritsch

doi:10.1117/12.2000309

10 October 2012 Self-consistent optomechanical trapping, strain and deformation of elastic dielectrics

M. Sonnleitner, M. Ritsch-Marte, H. Ritsch

Proceedings Volume 8458, Optical Trapping and Optical Micromanipulation IX; 84581Z (2012) https://doi.org/10.1117/12.2000309
Event: SPIE NanoScience + Engineering, 2012, San Diego, California, United States

Abstract

Light forces induced by scattering and absorption in elastic dielectrics lead to strain inducing local density modulations and deformations. These perturbations in turn modify the light propagation and generate an intricate nonlinear response. We generalise an analytic approach where light propagation in one-dimensional media of inhomogeneous density is modelled as a result of multiple scattering between polarizable slices. Using the Maxwell stress tensor formalism we compute the local optical forces and iteratively approach self-consistent density distributions where the elastic back-action balances gradient- and scattering forces. For an optically trapped finite dielectric we derive the nonlinear dependence of trap position, stiffness and total deformation on the object’s size and field configuration. Generally trapping is enhanced by deformation, which exhibits a periodic change between stretching and compression even allowing areas of bistability. This strongly deviates from qualitative expectations based on the change of photon momentum of light crossing the surface of a dielectric.

Citation Download Citation

M. Sonnleitner, M. Ritsch-Marte, and H. Ritsch "Self-consistent optomechanical trapping, strain and deformation of elastic dielectrics", Proc. SPIE 8458, Optical Trapping and Optical Micromanipulation IX, 84581Z (10 October 2012); https://doi.org/10.1117/12.2000309

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