Measurement of small light absorption in microparticles by means of optically induced rotation.

The absorption parameters of micro-particles have been associated with the induced spin exerted upon the particle, when embedded in a circularly polarized coherent field. The induced rotational speed is theoretically analyzed, showing the influence of the beam parameters, the parameters of the particle and the tribological parameters of the surrounding fluid. The theoretical findings have been adequately confirmed in experiments.

[1]  O V Angelsky,et al.  Orbital rotation without orbital angular momentum: mechanical action of the spin part of the internal energy flow in light beams. , 2011, Optics express.

[2]  Kishan Dholakia,et al.  Optical manipulation of nanoparticles: a review , 2008 .

[3]  J. Burns,et al.  Radiation forces on small particles in the solar system , 1979 .

[4]  V. Ramaswamy,et al.  Simultaneous determination of refractive index and size of spherical dielectric particles from light scattering data. , 1983, Applied optics.

[5]  A. Ashkin,et al.  Applications of laser radiation pressure. , 1980, Science.

[6]  P. Wyatt.  Some chemical, physical, and optical properties of fly ash particles. , 1980, Applied optics.

[7]  O V Angelsky,et al.  Self-diffraction of continuous laser radiation in a disperse medium with absorbing particles. , 2013, Optics express.

[8]  Irene A. Stegun,et al.  Handbook of Mathematical Functions. , 1966 .

[9]  F. Nori,et al.  Mie scattering and optical forces from evanescent fields: a complex-angle approach. , 2012, Optics express.

[10]  WHAT DO EXPERIMENTS IN OPTICS TELL US ABOUT PHOTON MOMENTUM IN MEDIA , 2013, 1310.3684.

[11]  Philip L. Marston,et al.  Radiation torque on a sphere caused by a circularly-polarized electromagnetic wave , 1984 .

[12]  H. Rubinsztein-Dunlop,et al.  Optical application and measurement of torque on microparticles of isotropic nonabsorbing material , 2003, physics/0309122.

[13]  Sang Soo Lee,et al.  Optical torque exerted on a homogeneous sphere levitated in the circularly polarized fundamental-mode laser beam , 1985 .

[14]  C. M. Randall,et al.  Refractive-index measurements of single micron-sized carbon particles. , 1980, Applied optics.

[15]  T. Henning.  Interstellar dust grains - an overview , 1997 .

[16]  M. El-Sayed,et al.  Gold and silver nanoparticles in sensing and imaging: sensitivity of plasmon response to size, shape, and metal composition. , 2006, The journal of physical chemistry. B.

[17]  Bruce T. Draine,et al.  The discrete-dipole approximation and its application to interstellar graphite grains , 1988 .

[18]  A. Ashkin,et al.  Optical trapping and manipulation of neutral particles using lasers. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[19]  K. Svoboda,et al.  Biological applications of optical forces. , 1994, Annual review of biophysics and biomolecular structure.

[20]  M. Nieto-Vesperinas,et al.  Electric and magnetic dipolar response of germanium nanospheres: interference effects, scattering anisotropy, and optical forces , 2011, 1104.3363.

[21]  J. Sáenz,et al.  Optical forces on small magnetodielectric particles. , 2010, Optics express.

[22]  Lihong V. Wang,et al.  Photoacoustic tomography: principles and advances. , 2016, Electromagnetic waves.

[23]  Sang Soo Lee,et al.  Scattering of laser beams and the optical potential well for a homogeneous sphere , 1983 .

[24]  Norman R. Heckenberg,et al.  Optical tweezers computational toolbox , 2007 .

[25]  Aleksandr Bekshaev,et al.  Subwavelength particles in an inhomogeneous light field: optical forces associated with the spin and orbital energy flows , 2012, 1210.5730.

[26]  Freitas Robert A.Jr.  CURRENT STATUS OF NANOMEDICINE AND MEDICAL NANOROBOTICS , 2005 .

[27]  S. Barnett,et al.  The enigma of optical momentum in a medium , 2010, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[28]  O V Angelsky,et al.  Investigation of optical currents in coherent and partially coherent vector fields. , 2011, Optics express.

[29]  Pj Piet Lemstra,et al.  Preparation of thermoset rubbery epoxy particles as novel toughening modifiers for glassy epoxy resins , 1999 .