title: Angular amplification by a diffraction grating for chiro-optical measurements.
abstract: The angles at which a light beam gets diffracted by a grating depend strongly on the direction of incidence for diffraction angles close to a right angle. Accordingly, it is possible to amplify small beam deflections by placing a grating at an optimal orientation to the light path. We use this principle to amplify small beam deviations arising out of a light beam refracting at the interface of an optically active medium, and demonstrate a new technique of enhancing the limit of detection of chiro-optical measurements.
authors.affiliation: Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore, India. rajithapraj@gmail.com
authors.forename: Rajitha
authors.initials: R
authors.lastname: Papukutty Rajan
authors.forename: Ambarish
authors.initials: A
authors.lastname: Ghosh
mesh_terms: D000465:Algorithms; D004574:Electromagnetic Fields; D004867:Equipment Design; D008027:Light; D009904:Optical Rotation; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods*; D013499:Surface Properties