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Two properties of twisted-light absorption

DSpace at IIT Bombay

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Title Two properties of twisted-light absorption
 
Creator AFANASEV, A
CARLSON, CE
MUKHERJEE, A
 
Subject ORBITAL ANGULAR-MOMENTUM
BEAMS
FORCES
SPHERE
SPIN
 
Description We discuss two features of twisted-light absorption both by hydrogen-like atoms and by microparticles. First, we extend the treatment of atomic photoexcitation by twisted photons to include atomic recoil, derive generalized quantum selection rules, and consider phenomena of forbidden atomic transitions. In particular, we demonstrate that whatever part of the twisted photon's total helicity does not go into exciting the atomic state goes into making the atom as a whole revolve about the photon's symmetry axis. Second, using the same electromagnetic potential for the twisted light beams, we analyze the radiation pressure from these beams on micro-sized particles and verify that while the Poynting vector can in some circumstances point back toward the source, a complete analysis nonetheless gives a repulsive radiation pressure. (C) 2014 Optical Society of America
 
Publisher OPTICAL SOC AMER
 
Date 2014-12-28T12:35:05Z
2014-12-28T12:35:05Z
2014
 
Type Article
 
Identifier JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 31(11)2721-2727
0740-3224
1520-8540
http://dx.doi.org/10.1364/JOSAB.31.002721
http://dspace.library.iitb.ac.in/jspui/handle/100/16549
 
Language English