Amplified spontaneous emission from single CdS nanoribbon with low symmetric cross sections

Xin Long Xu; Jian Xiong Wang; Guang Yin Jing; Ze Xiang Shen; Bing Suo Zou; Hai Ming Fan; Malini Olivo

doi:10.1039/C2NR30980G

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Nanoscale

Issue 18, 2012

A new peer reviewed journal publishing experimental and theoretical work across the breadth of nanoscience and nanotechnology

Impact Factor 5.914 24 Issues per Year

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Paper

Amplified spontaneous emission from single CdS nanoribbon with low symmetric cross sections

Xin Long Xu,^a^b Jian Xiong Wang,^c Guang Yin Jing,^a Ze Xiang Shen,^d Bing Suo Zou,^e Hai Ming Fan*^a^f and Malini Olivo^f

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Nanobiophotonic Center, State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, Institute of Photonics & Photon-Technology, Northwest University, Xi'an, China
E-mail: nanofhm@gmail.com ;
Fax: +86 29 88303336 ;
Tel: +86 29 88303336

Institute of Physics, Chinese Academy of Science, Beijing, China

School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore

Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 1 Nanyang Walk, Block 5, Level 3, Singapore

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

Physics Department, National University of Ireland Galway, Galway, Ireland

Nanoscale, 2012,4, 5665-5672

DOI: 10.1039/C2NR30980G
Received 23 Apr 2012, Accepted 07 Jul 2012
First published online 10 Jul 2012

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CdS nanoribbons with various cross sections offer the opportunity to deeply understand the interaction between optical cavity and spontaneous emission. Herein, long tapered nanoribbons with the cross sections gradually changing were synthesized by a simple physical vapour deposition method. Morphology dependent micro-region photoluminescence (PL) spectroscopy is employed to show Purcell effect along different low symmetry cross sections. Spikes on the PL spectra reveal that local density of optical modes increases when the mode match happens between optical cavity and spontaneous emission. Bound exciton complex related amplified spontaneous emission is observed in a single CdS nanoribbon with well-defined elliptical cross sections and optimized width/thickness ratio [similar] 1.45. Polarized Raman and TEM confirmed that the nanoribbon with the elliptical cross section adopts the [0002] growth direction with good quality. The results suggest that the cross section resonant cavity would be of importance for both fundamental and practical application of cavity quantum electrodynamics in CdS nanoribbon.