Intense UV emission and lasing action of a single, free-standing and post heat-treated ZnO microribbon

Authors

Jamaica N. Pangasinan ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Hernanie T. Salazar, Jr. ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel A. Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Roland V. Sarmago ⋅ PH National Institute of Physics, University of the Philippines Diliman
Ren Arita ⋅ JP Institute of Laser Engineering, Osaka University
Melvin John F. Empizo ⋅ JP Institute of Laser Engineering, Osaka University
Kohei Yamanoi ⋅ JP Institute of Laser Engineering, Osaka University
Yuki Minami ⋅ JP Institute of Laser Engineering, Osaka University
Toshihiko Shimizu ⋅ JP Institute of Laser Engineering, Osaka University
Nobuhiko Sarukura ⋅ JP Institute of Laser Engineering, Osaka University

Abstract

Zinc oxide microribbons prepared via carbothermal reduction route with and without post-annealing in oxygen are studied for their potential laser applications. Post-annealing in oxygen improved the UV emission of the microribbons and decreased the green emission due to intrinsic defects. Temporal analysis revealed fast emission lifetime, higher binding energy and low lasing threshold of 1.8 mJ/cm². These properties are attributed to Whispering-gallery mode wherein light propagates in the microcavity due to multiple internal reflections.

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Issue

2015: Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2015-PA-12

Section

Poster Session PA

Published

2015-06-03

How to Cite

[1]

JN Pangasinan, HT Salazar, AA Salvador, RV Sarmago, R Arita, MJF Empizo, K Yamanoi, Y Minami, T Shimizu, and N Sarukura, Intense UV emission and lasing action of a single, free-standing and post heat-treated ZnO microribbon, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-PA-12 (2015). URL: https://proceedings.spp-online.org/article/view/1171.