Gaining control on optical force by the stimulated-emission resonance effect

Area of Science:

• Optics and Photonics
• Nanotechnology
• Soft Matter Physics

Background:

• Radiation forces on micro/nanoscale objects are influenced by electronic transitions and photon flux, particularly at interfaces.
• Non-linear stimulated emission was theoretically predicted to induce optical forces opposite to conventional scattering/absorption.
• Precise control over optical forces is crucial for advanced manipulation techniques.

Purpose of the Study:

• To experimentally and theoretically demonstrate a repulsive pulling optical force induced by stimulated emission.
• To integrate attractive (excited state absorption) and repulsive (stimulated emission) forces for tunable optical manipulation.
• To validate the non-linear optical resonance theory for controlling optical forces.

Main Methods:

• Theoretical modeling of optical forces at resonance conditions.
• Experimental setup involving a single trapped dye-doped particle.
• Integration of attractive and repulsive force mechanisms.

Main Results:

• Demonstrated a repulsive pulling optical force from stimulated emission on a single trapped particle.
• Successfully combined attractive pushing and repulsive pulling forces.
• Validated the non-linear optical resonance theory for optical force control.

Conclusions:

• Stimulated emission can induce a repulsive optical force, offering new manipulation possibilities.
• Integration of different resonance forces allows for exquisite control over optical forces.
• This work paves the way for advanced single particle manipulation using tailored optical forces.