Continuously tunable organic solid-state DFB laser utilizing molecular reorientation in molecular glasses
Journal
Organic Electronics: physics, materials, applications
Journal Volume
14
Journal Issue
10
Pages
2540-2545
Date Issued
2013
Author(s)
Cheng, H.-C.
Huang, Y.-H.
Lin, H.-W.
Chang, C.-H.
Wong, K.-T.
Kuan, C.-H.
CHIEH-HSIUNG KUAN
Abstract
We report a facile way for continuously tuning the lasing wavelength of an organic thinfilm distributed feedback (DFB) laser after device fabrication by varying the effective refractive index seen by the one-dimension DFB laser structure. Varying the effective refractive indices of the organic gain medium and thus the effective refractive index of a one-dimension DFB laser structure after device fabrication is made possible with reorientation of molecules in a molecular glass at elevated temperatures. Distributions of molecular orientations can be fine controlled by annealing temperatures and times, permitting continuous tuning of optical properties and lasing wavelengths. Molecular reorientation can be conducted after devices are made, thus giving one the freedom to set or tune the lasing wavelength to meet a particular purpose with a common structure. © 2013 Elsevier B.V.
Type
journal article