Semiconductor photonic crystals for optoelectronics
2004 (English)In: Physica. E, Low-Dimensional systems and nanostructures, ISSN 1386-9477, E-ISSN 1873-1759, Vol. 21, no 2-4, 802-808 p.Article in journal (Refereed) Published
We present a number of designs for the integration of photonic crystals (PC) with active semiconductor devices. As a first step, the use of PC blocks as laser mirrors is demonstrated. Ridge-waveguide lasers with a length of 100 mum and two PC mirrors achieve threshold currents below 8 mA. In order to obtain single-mode operation, an intracavity PC mirror can be used, which effectively separates the laser into two coupled cavities. Lasing occurs where two modes of the cavities coincide, leading to single-mode operation with a side-mode suppression ratio (SMSR) of over 35 dB. We also present two full PC devices: a single-mode laser with a coupled resonant cavity waveguide (CROW) and a tunable laser. The CROW device consists of a chain of 40 hexagonal cavities formed in a block of PC, with a total length of 140 mum. Low threshold, single-mode operation with over 40 dB SMSR is demonstrated. Coupled cavities are used for the tunable PC laser, which covers a tuning range of over 30 nm.
Place, publisher, year, edition, pages
2004. Vol. 21, no 2-4, 802-808 p.
photonic crystals, semiconductor lasers
IdentifiersURN: urn:nbn:se:kth:diva-43790DOI: 10.1016/j.physe.2003.11.122ISI: 000220873300136ScopusID: 2-s2.0-1642369325OAI: oai:DiVA.org:kth-43790DiVA: diva2:449032
QC 201110192011-10-192011-10-182012-01-27Bibliographically approved