Multicolor lasing prints
Date
2015Source Title
Applied Physics Letters
Print ISSN
0003-6951
Publisher
American Institute of Physics Inc.
Volume
107
Issue
22
Language
English
Type
ArticleItem Usage Stats
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Abstract
This work demonstrates mass production of printable multi-color lasing microarrays based on uniform hemispherical microcavities on a distributed Bragg reflector using inkjet technique. By embedding two different organic dyes into these prints, optically pumped whispering gallery mode microlasers with lasing wavelengths in green and red spectral ranges are realized. The spectral linewidth of the lasing modes is found as narrow as 0.11 nm. Interestingly, dual-color lasing emission in the ranges of 515-535 nm and 585-605 nm is simultaneously achieved by using two different dyes with certain ratios. Spectroscopic measurements elucidate the energy transfer process from the green dye (donor) to the red one (acceptor) with an energy transfer efficiency up to 80% in which the nonradiative Förster resonance energy transfer dominates. As such, the acceptor lasing in the presence of donor exhibits a significantly lower (∼2.5-fold) threshold compared with that of the pure acceptor lasing with the same concentration. © 2015 AIP Publishing LLC.
Keywords
Energy transferEnergy transfer efficiency
Energy transfer process
Ink-jet technique
Lasing wavelength
Optically pumped
Resonance energy transfer
Spectral line width
Spectroscopic measurements
Whispering gallery modes