Nanostructured Fibers and Nonlinear Optics
Prof. Siddharth Ramachandran, Electrical & Computer Engineering Department, Boston University
fiber fabrication & drawing
photonic crystal fabrication
thin-film waveguide fabrication
metal-dielectric nanostructuring
Scientific Principles
quantum entanglement
plasmonic light confinement
spatio-temporal light manipulation
nonlinear & dispersive phase control
high-power lasers
chemical & biological sensors
microscopy, imaging & cell manipulation
quantum communications & cryptography

Fiber-Grating Opto-Fluidic Sensorsapl_cover

Optical Vortices

Photonic Crystal Fibers

Self-healing Bessel Beamsbessel_reconstruct

Light beams in free space travel at the "speed of light," and tend to diverge (diffract). Complex, nano-structured photonic devices can be used to slow light (confine photons in time) and counteract diffraction (by confining photons in space). Some confinement geometries lead to spatially complex beams that possess intriguing properties such as the ability of optical vortices to carry orbital angular momentum or the ability of Bessel beams to self-heal. Our group studies the myriad phenomena encountered by the manipulation of such fundamental effects of light, with the aim of developing next generation photonic devices.