ASET Colloquium
Nanostructured Materials for Controlling Light
by Prof. Venu Gopal Achanta (DCMP&MS, TIFR)
Friday, May 2, 2014
from
to
(Asia/Kolkata)
at Colaba Campus ( AG-66 )
at Colaba Campus ( AG-66 )
Description |
Light control and modulation have applications in many different science and engineering fields. It would be interesting to note that one of the earliest proposals for anti-reflection coatings was by Lord Rayleigh in 1880. From then, the so called quarter wave stacks, graded index materials and more recently nanostructured materials were demonstrated as anti-reflection coatings. However, one proposal which has not been experimentally realized is the optical reflectionless potential. In this talk, I will mainly focus on our results on refractive index profiles conforming to reflectionless potentials. These structures show broadband, polarization and launch angle independent suppression of reflection. In addition to this property, they show negative group index over broad band. Consequences include superluminal transmission and pulse compression. If time permits, I will show results on light modulation and light harvesting using metamaterials. |
Organised by | Dr. Satyanarayana Bheesette |
PODCAST | click here to start |