Conical refraction is observed when a light beam passing along one of the optic axis of a biaxial crystal is transformed into a light ring. Since its discovery in the 1830s by Hamilton and Lloyd till very recently, conical refraction has been an almost forgotten phenomenon. We focus our investigations in conical refraction not only with respect to fundamental issues but also to applications such as in free space optical communications, in polarization metrology, in the manipulation of microparticles via photophoresis, and in trapping single-atoms and Bose–Einstein condensates in ring potentials.
Recent articles:
- “Blue-detuned optical ring trap for Bose-Einstein condensates based on conical refraction”, A. Turpin, J. Polo, Y. Loiko, J. Küber, F. Schmaltz, T. K. Kalkandjiev, V. Ahufinger, G. Birkl, J. Mompart, Optics Express 23, 1638 (2015)
- “Conical refraction healing after partially blocking the input beam”, A. Turpin, Y. Loiko, T. K. Kalkandjiev, R. Corbalán, J. Mompart, Phys. Rev. A 92, 013802 (2015)
- “Generating a three-dimensional dark focus from a single conically refracted light beam”, Y. Loiko, A. Turpin, T. K. Kalkandjiev, E. U. Rafailov, J. Mompart, Optics Letters 38, 4648 (2013)
- “Conical refraction as a tool for polarization metrology”, A. Peinado, A. Turpin, A. Lizana, E. Fernández, J. Mompart, J. Campos, Optics Letters 38, 4100 (2013)
- “Optical vault: A reconfigurable bottle beam based on conical refraction of light”, A. Turpin, V. Shvedov, C. Hnatosky, Y. Loiko, J. Mompart, W. Korlikowski, Optics Express 21, 26335 (2013)
- “Free-space optical polarization demultiplexing and multiplexing by means of conical refraction”, A. Turpin, Y. Loiko, T. K. Kalkandjiev, J. Mompart, Optics Letters 37, 4197 (2012)
Review article:
- “Conical refraction: fundamentals and applications”, A. Turpin, Y. Loiko, T. K. Kalkandjiev, J. Mompart, Laser & Photonics Reviews 70, 750 (2016)
Patents:
- “System, method, transmitter and receiver for optical communications”, T. K. Kalkandjiev, J. Mompart, A. Turpin, Y. Loiko, Universitat Autònoma de Barcelona, PCT/ES2013/070027 (Jan. 23, 2013); WO2013110842 A1 (August 1, 2013)
- “A polarimeter based on conical refraction and a method for determining the polarization state of an input electromagnetic radiation”, J. Mompart, A. Turpin, T. K. Kalkandjiev, A. Peinado, A. Lizana, J. Campos, Universitat Autònoma de Barcelona, PCT/EP2014/065918 (July 24, 2014); WO2015014709 A1 (Feb. 5, 2015)