Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Photonic crystal cavity embedded in electromagnetically induced transparency media
KTH, School of Information and Communication Technology (ICT), Optics and Photonics.
KTH, School of Information and Communication Technology (ICT), Optics and Photonics.
KTH, School of Information and Communication Technology (ICT), Optics and Photonics.
2010 (English)In: Journal of Optics, ISSN 2040-8978, E-ISSN 2040-8986, Vol. 12, no 3, 035105- p.Article in journal (Refereed) Published
Abstract [en]

Photonic crystal cavities are known for their high quality factor and small modal volume. Electromagnetically induced transparency (EIT) is known for its dramatic dispersion. We study the fundamental cavity mode of a two-dimensional photonic crystal embedded in an EIT medium. Comparison of finite-difference time-domain simulations with an analytical intracavity-EIT model yields similar results: the modal density of the photonic crystal cavity increases and the cavity resonance is pulled from the empty cavity resonance to the two-photon resonance of the EIT medium. As a consequence, the quality factor may be enhanced by more than two orders of magnitude. For a miniature sized 2.5 lambda x 2.5 lambda photonic crystal cavity based on a 5 x 5 high index rod structure with a missing centre rod, the quality factor can be increased from 200 to 40 000.

Place, publisher, year, edition, pages
2010. Vol. 12, no 3, 035105- p.
Keyword [en]
photonic crystal cavity, electromagnetically induced transparency, quality factor, mode pulling
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-29490DOI: 10.1088/2040-8978/12/3/035105ISI: 000279943100011Scopus ID: 2-s2.0-77951831328OAI: oai:DiVA.org:kth-29490DiVA: diva2:394700
Funder
Swedish Research Council
Note
QC 20110203. Previous title " Photonic crystal microcavity made of electromagnetically induced transparency  material ".Available from: 2011-02-03 Created: 2011-02-02 Last updated: 2017-12-11Bibliographically approved
In thesis
1. Slow and stopped light by light-matter coherence control
Open this publication in new window or tab >>Slow and stopped light by light-matter coherence control
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis we study light-matter coherence phenomena related to the interaction of a coherent laser field and the so-called Λ-system, a three-level quantum system (e.g., an atom). We observe electromagnetically induced transparency (EIT), slow and stored light in hot rubidium vapor. For example, a 6 μs Gaussian pulse propagate at a velocity of ~1 km/s (to be compared with the normal velocity of 300 000 km/s). Dynamic changes of the control parameter allows us to slow down a pulse to a complete stop, store it for ~100 μs, and then release it. During the storage time, and also during the release process, some properties of the light pulse can be changed, e.g., frequency chirping of the pulse is obtained by means of Zeeman shifting the energy levels of the Λ-system. If, bichromatic continuous light fields are applied we observe overtone generation in the beating signal, and a narrow `dip' in overtone generation efficiency on two-photon resonance, narrower than the `coherent population trapping' transparency. The observed light-matter coherence phenomena are explained theoretically from first principles, using the Lindblad master equation, in conjunction with the Maxwell's equations. Furthermore, we analyze an optical delay-line based on EIT and show that there is in principle (besides decoherence) no fundamental limitation, but the usefulness today is scant. The combination of EIT and a photonic crystal cavity is inquired into, and we show that the quality value of a small resonator (area of 2.5λ×2.5λ with a missing central rod) can be enhanced by a factor of 500 due to the increased modal density close to two-photon resonance. Open system effects (decoherence effects) are thoroughly investigated using a coherence vector formalism, furthermore, a vector form of the Lindblad equation is derived. Specifically we find an open system channel that lead to slow light and gain.

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. xii, 105 p.
Series
Trita-ICT/MAP AVH, ISSN 1653-7610 ; 2009:09
Keyword
slow light, stored light, stopped light, light-matter coherence, electromagnetically induced transparency, rubidium atoms
National Category
Physical Sciences Telecommunications
Identifiers
urn:nbn:se:kth:diva-11212 (URN)978-91-7415-429-0 (ISBN)
Public defence
2009-10-29, C1, Electrum, Isafjordsgatan 22, Kista, 13:15 (English)
Opponent
Supervisors
Note
QC 20100812Available from: 2009-10-07 Created: 2009-10-06 Last updated: 2012-03-27Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Tidström, JonasNeff, Curtis W.Andersson, L. Mauritz
By organisation
Optics and Photonics
In the same journal
Journal of Optics
Telecommunications

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 65 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf