Optical forces arising from phase gradients.

نویسندگان

  • Yohai Roichman
  • Bo Sun
  • Yael Roichman
  • Jesse Amato-Grill
  • David G Grier
چکیده

We demonstrate both theoretically and experimentally that phase gradients in a light field can be used to create a new category of optical traps complementary to the more familiar intensity-gradient traps known as optical tweezers. We further show that the work done by phase-gradient forces is path dependent and briefly discuss some ramifications of this nonconservativity.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

2) United States Patent Other Publications Ashkin Et Al., " Observation of a Single-beam Gradient Force Optical American Physical Society. (continued

Ashkin et al., “Observation of a single-beam gradient force optical trap for dielectric particles”, Optics Letters, May 1986, pp. 288-290, vol. 11. No. 5, Optical Society ofAmerica. Durnin, J ., “Exact-solutions for nondiffracting beams. 1. The scalar theory”, J. Opt. Soc. Am. A, Apr. 1987, pp. 651-654, vol. 4, No.4, Optical Society of America. Durnin, et al., “Diffraction-free beams”, Phys. Re...

متن کامل

Evanescent-wave bonding between optical waveguides.

Forces arising from overlap between the guided waves of parallel, microphotonic waveguides are calculated. Both attractive and repulsive forces, determined by the choice of relative input phase, are found. Using realistic parameters for a silicon-on-insulator material system, we estimate that the forces are large enough to cause observable displacements. Our results illustrate the potential for...

متن کامل

In situ size sorting in CVD synthesis of Si microspheres

Silicon microspheres produced in gas-phase by hot-wall CVD offer unique quality in terms of sphericity, surface smoothness, and size. However, the spheres produced are polydisperse in size, which typically range from 0.5 μm to 5 μm. In this work we show through experiments and calculations that thermophoretic forces arising from strong temperature gradients inside the reactor volume effectively...

متن کامل

Fabrication of a material assembly of silver nanoparticles using the phase gradients of optical tweezers.

Optical matter can be created using the intensity gradient and electrodynamic (e.g., optical binding) forces that nano- and microparticles experience in focused optical beams. Here we show that the force associated with phase gradient is also important. In fact, in optical line traps the phase gradient force is crucial in determining the structure and stability of optical matter arrays consisti...

متن کامل

Photokinetic analysis of the forces and torques exerted by optical tweezers carrying angular momentum.

The theory of photokinetic effects expresses the forces and torques exerted by a beam of light in terms of experimentally accessible amplitude and phase profiles. We use this formalism to develop an intuitive explanation for the performance of optical tweezers operating in the Rayleigh regime, including effects arising from the influence of light's angular momentum. First-order dipole contribut...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physical review letters

دوره 100 1  شماره 

صفحات  -

تاریخ انتشار 2008