Spin-to-orbital angular momentum conversion in a strongly focused optical beam

Yiqiong Zhao*, J. Scott Edgar, Gavin D.M. Jeffries, David McGloin, Daniel T. Chiu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

546 Citations (Scopus)


As a fundamental property of light, the angular momentum of photons has been of great interest. Here, we demonstrate that optical spin-to-orbital angular momentum conversion can occur in a homogeneous and isotropic medium. This Letter presents both theoretical and experimental studies of this conversion in a tightly focused beam and shows that the orbital rotation speeds of trapped particles are altered because of this conversion as predicted by theory.

Original languageEnglish
Article number073901
JournalPhysical Review Letters
Issue number7
Publication statusPublished - 15 Aug 2007


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