Efficient and directed Nano-LED emission by a complete elimination of transverse-electric guided modes.
Nano Lett
; 11(2): 476-81, 2011 Feb 09.
Article
em En
| MEDLINE
| ID: mdl-21171627
ABSTRACT
A key to the success of solid-state lighting is an ultraefficient light extraction, â¼90%. Recent advances in nanotechnology, particularly in creating nanorods, present an unprecedented opportunity to manipulate optical modes at nanometer scales. Here, we report an optically pumped nanorod light-emitting diode (LED) with an ultrahigh extraction efficiency of 79% at λ = 460 nm without the use of either a back reflector or thin film technology. We demonstrated experimentally three key mechanisms for achieving high efficiency guided mode-reduction, embedded quantum wells, and ultraefficient light out-coupling by the fundamental HE(11) mode. Furthermore, we show that size reduction at nanoscale represents a new degree-of-freedom for alternating and achieving a more directed LED emission.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Semicondutores
/
Iluminação
/
Nanotecnologia
/
Pinças Ópticas
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Estados Unidos