Near-field and far-field analysis of an azimuthally polarized slow Bloch mode microlaser

Thanh Phong Vo*, Adel Rahmani, Ali Belarouci, Christian Seassal, Dusan Nedeljkovic, Ségoléne Callard

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We report on the near- and far-field investigation of the slow Bloch modes associated with the G point of the Brillouin zone, for a honeycomb lattice photonic crystal, using near-field scanning optical microscopy (NSOM) and infra-red CCD camera. The array of doughnut-shaped monopolar mode (mode M) inside each unit cell, predicted previously by numerical simulation, is experimentally observed in the near-field by means of a metal-coated NSOM tip. In far-field, we detect the azimuthal polarization of the doughnut laser beam due to destructive and constructive interference of the mode radiating from the surface (mode TEM01*). A divergence of 2° for the laser beam and a mode size of (12.8 ± 1) μm for the slow Bloch mode at the surface of the crystal are also estimated.

Original languageEnglish
Pages (from-to)26879-26886
Number of pages8
JournalOptics Express
Volume18
Issue number26
DOIs
Publication statusPublished - 20 Dec 2010

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