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Different regimes of the Purcell effect in disordered photonic crystals
St Petersburg Acad Univ, Russia; ITMO Univ, Russia.
St Petersburg Acad Univ, Russia.
St Petersburg Acad Univ, Russia; ITMO Univ, Russia.
ITMO Univ, Russia.
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2018 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 30, no 43, article id 435304Article in journal (Refereed) Published
Abstract [en]

We demonstrate that disorder in photonic crystals could lead to pronounced modification of spontaneous emission rate in the frequency region corresponding to the photonic band gap (PBG). Depending on the amount of disorder, two different regimes of the Purcell effect occurs. We provide statistical analysis of Purcell coefficient on the frequency of the emitter and its position within the sample. For the moderate disorder, an enhancement of spontaneous emission occurs at the edge of PBG due to the modification of properties of the edge state. This effect is responsible for recently observed mirrorless lasing in photonic crystals at the edge of PBG. When the level of disorder increases, the spontaneous emission rate enhances within the PBG due to the appearance of the high quality factor states. This effect is likely responsible for a superlinear dependence of emissions on pumping observed in synthetic opals.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2018. Vol. 30, no 43, article id 435304
Keywords [en]
purcell effect; disordered media; light-matter interaction
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:liu:diva-152374DOI: 10.1088/1361-648X/aae18cISI: 000446828200003PubMedID: 30215612OAI: oai:DiVA.org:liu-152374DiVA, id: diva2:1260700
Note

Funding Agencies|Russian Science Foundation [16-12-10503]

Available from: 2018-11-05 Created: 2018-11-05 Last updated: 2018-11-05

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Thin Film PhysicsFaculty of Science & Engineering
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