Ultra-broad spontaneous emission and modal gain spectrum from a hybrid quantum well/quantum dot laser structure

作者：Chen S M^*; Zhou K J; Zhang Z Y; Childs D T D; Hugues M; Ramsay A J; Hogg R A

来源：Applied Physics Letters, 2012, 100(4): 041118.

DOI：10.1063/1.3679178

We propose and demonstrate a hybrid quantum well/quantum dot structure to enhance the gain and spontaneous emission bandwidth of a quantum dot active region. A single quantum well is introduced into a multi-layer stack of quantum dots, spectrally positioned to cancel the losses due to the second excited state of the dots. As a result, the modal gain at room temperature is extended to 300 nm, covering the wavelength range of 1100-1400 nm, and spontaneous emission has a 250 nm, 3 dB linewidth from 1080-1335 nm, of interest to short-haul telecom and optical coherence tomography applications.

• 出版日期2012-1-23