Abstract：
:Organic semiconductors enable the fabrication of a range of lightweight and mechanically flexible optoelectronic devices. Most organic semiconductor lasers, however, have remained rigid until now, predominantly due to the need for a support substrate. Here, we use a simple fabrication process to make membrane-based, substrate-less and extremely thin (<500 nm) organic distributed feedback lasers that offer ultralow-weight (m/A<0.5 gm-2) and excellent mechanical flexibility. We show operation of the lasers as free-standing membranes and transfer them onto other substrates, e.g. a banknote, where the unique lasing spectrum is readily read out and used as security feature. The pump thresholds and emission intensity of our membrane lasers are well within the permissible exposures for ocular safety and we demonstrate integration on contact lenses as wearable security tags.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Karl M,Glackin JME,Schubert M,Kronenberg NM,Turnbull GA,Samuel IDW,Gather MCdoi
10.1038/s41467-018-03874-wsubject
Has Abstractpub_date
2018-05-01 00:00:00pages
1525issue
1issn
2041-1723pii
10.1038/s41467-018-03874-wjournal_volume
9pub_type
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