Photonic nanojet assisted enhancement in transmission of light through hollow pyramid shaped near field probes. (16th April 2015)

• Record Type: Journal Article
• Authors: Patel, H S; Kushwaha, P K; Swami, M K; Gupta, P K
• Is Part Of: Journal of optics. Volume 17:Number 5(2015:May)
• Publication Date: 2015-04-16
• Subjects: near field scanning optical microscope -- photonic nanojet -- sub-wavelength confinement; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8978/17/5/055005
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: We report the use of sub-wavelength confinement of light using dielectric microspheres for enhancing transmission through the cantilever-based hollow probes used in a near-field scanning optical microscope. With an appropriate choice of the dielectric microsphere, an order of magnitude enhancement was achieved in transmission through the probe. In addition, transmission through such a tip was also found to be less sensitive to the axial and lateral offset between the beam waist and symmetry axis of the probe tip.