http://www.cnr.it/ontology/cnr/individuo/prodotto/ID175980
Vertically emitting microdisk lasers (Articolo in rivista)
- Type
- Label
- Vertically emitting microdisk lasers (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1038/NPHOTON.2008.248 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Lukas Mahler; Alessandro Tredicucci; Fabio Beltram; Christoph Walther; Jérôme Faist; Bernd Witzigmann; Harvey E. Beere; David A. Ritchie (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.nature.com/nphoton/journal/v3/n1/full/nphoton.2008.248.html (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- NEST, CNR-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126, Pisa, Italy;
Scuola Normale Superiore, Italian Institute of Technology UdR, Piazza dei Cavalieri 7, I-56126, Pisa, Italy;
Institute for Quantum Electronics, ETH Zürich, HPT H 7, Wolfgang-Pauli-Strasse 16, CH-8093 Zürich, Switzerland;
Integrated Systems Laboratory, ETH Zürich, ETZ J83, Gloriastrasse 35, CH-8092 Zürich, Switzerland;
Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, UK (literal)
- Titolo
- Vertically emitting microdisk lasers (literal)
- Abstract
- In microdisk lasers(1-3) a ring resonator is formed by successive total internal reflections inside a circularly shaped waveguide. The photon lifetime of the resulting whispering gallery optical modes is limited mainly by the waveguide absorption. Light is usually coupled out by tunnelling owing to the disk curvature or through imperfections at the border, but the output power is hard to exploit in a potential application because the emission is mainly in the disk plane and isotropic. Here we realize vertically emitting whispering gallery lasers by implementing appropriate diffraction gratings along the disk circumference. We use terahertz quantum cascade structures(4,5) and demonstrate a 50-fold increase in the optical power compared to devices without gratings, while at the same time engineering the lasing spectrum according to the grating rotational symmetry. This concept will allow the fabrication of compact arrays of single-mode terahertz sources with regular beam profiles and high output power. (literal)
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