Direct imaging of photonic nanojets - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Optics Express Année : 2008

Direct imaging of photonic nanojets

Patrick Ferrand
Jérôme Wenger
A. Devilez
  • Fonction : Auteur
M. Pianta
  • Fonction : Auteur
B. Stout
  • Fonction : Auteur
N. Bonod
E. Popov
  • Fonction : Auteur
H. Rigneault

Résumé

We report the direct experimental observation of photonic nanojets created by single latex microspheres illuminated by a plane wave at a wavelength of 520 nm. Measurements are performed with a fast scanning confocal microscope in detection mode, where the detection pinhole defines a diffraction-limited observation volume that is scanned in three dimensions over the microsphere vicinity. From the collected stack of images, we reconstruct the full 3 dimensional photonic nanojet beam. Observations are conducted forpolystyrene spheres of 1, 3 and 5 mum diameter deposited on a glass substrate, the upper medium being air or water. Experimental results are compared to calculations performed using the Mie theory. We measure nanojet sizes as small as 270 nm FWHM for a 3 mum sphere at a wavelength lambda of 520 nm. The beam keeps a subwavelength FWHM over a propagation distance of more than 3 lambda, displaying all the specificities of a photonic nanojet.
Fichier principal
Vignette du fichier
Ferrand_OpExp.pdf (1.19 Mo) Télécharger le fichier
movie_light.avi (1.52 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Format : Autre
Loading...

Dates et versions

hal-00232712 , version 1 (03-02-2008)

Identifiants

Citer

Patrick Ferrand, Jérôme Wenger, A. Devilez, M. Pianta, B. Stout, et al.. Direct imaging of photonic nanojets. Optics Express, 2008, 16 (10), pp.6930-6940. ⟨10.1364/OE.16.006930⟩. ⟨hal-00232712⟩
108 Consultations
278 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More