Mathe im Beruf Detailseite

Speaker:
Prof Basudev Roy / Department of Physics Indian Institute of Technology Madras

 A rigid body can have 6 degrees of freedom, namely the three
 translational degrees of freedom and the three rotational degrees of
 freedom. Of these, the translational degrees have been well explored
 in optical tweezers community. However, only the in-plane rotational
 degree of freedom has been explored. We call this in-plane degree of
 rotational freedom, the yaw motion in the nomenclature of the
 airlines. The pitch and roll degrees are only beginning to be explored
 recently.
 In this talk, I will show you 4 ways of generating pitch rotation using
 the optical tweezers. I will also show you one way of detection of
 pitch rotation at high resolution using birefringent particles. I will
 also show a few ways of generating controlled roll motion. Further, I will
 discuss some applications of this pitch rotation in cell biology and soft
 matter systems like the study of the properties of the cell membrane
 and rheology of the cell interior.