Open AccessSpontaneous emission enhancement and saturable absorption of colloidal quantum dots coupled to photonic crystal cavity
Author(s) -
Shilpi Gupta,
Edo Waks
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.029612
Subject(s) - quantum dot , laser linewidth , saturable absorption , spontaneous emission , materials science , photonic crystal , cadmium selenide , absorption (acoustics) , optoelectronics , optics , amplified spontaneous emission , purcell effect , laser , physics , fiber laser , wavelength
We demonstrate spontaneous emission rate enhancement and saturable absorption of cadmium selenide colloidal quantum dots coupled to a nanobeam photonic crystal cavity. We perform time-resolved lifetime measurements and observe an average enhancement of 4.6 for the spontaneous emission rate of quantum dots located at the cavity as compared to those located on an unpatterned surface. We also demonstrate that the cavity linewidth narrows with increasing pump intensity due to quantum dot saturable absorption.