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10 items by relevance
1 PhD Thesis

Active Photonic Crystal Waveguides

Ek, Sara

Technical University of Denmark — 2012

This thesis deals with the fabrication and characterization of active photonic crystal waveguides, realized in III-V semiconductor material with embedded active layers. The platform offering active photonic crystal waveguides has many potential applications. One of these is a compact photonic

Year: 2012

Language: English

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2 Conference paper

Active III-V Semiconductor Photonic Crystal Waveguides

Ek, Sara; Chen, Yaohui; Schubert, Martin; Semenova, Elizaveta; Hansen, Per Lunnemann; Yvind, Kresten; et al. (1 more)

Conference Proceedings — 2011, pp. 1-4

We experimentally demonstrate enhanced amplified spontaneous emission in a quantum well III-V semiconductor photonic crystal waveguide slab. The effect is described by enhanced light matter interaction with the decrease of the group velocity. These are promising results for future compact devices

Year: 2011

Language: English

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3 Preprint article · Journal article

Slow-light-enhanced gain in active photonic crystal waveguides

Ek, Sara; Hansen, Per Lunnemann; Chen, Yaohui; Semenova, Elizaveta; Yvind, Kresten; Mørk, Jesper

Nature Communications — 2014, Volume 5, Issue 1, pp. 5039

Passive photonic crystals have been shown to exhibit a multitude of interesting phenomena, including slow-light propagation in line-defect waveguides. It was suggested that by incorporating an active material in the waveguide, slow light could be used to enhance the effective gain of the material

Year: 2014

Language: English

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4 Journal article

Erratum: Slow-light-enhanced gain in active photonic crystal waveguides

Ek, Sara; Lunnemann, Per; Chen, Yaohui; Semenova, Elizaveta; Yvind, Kresten; Mork, Jesper

Nature Communications — 2015, Volume 6, Issue 1, pp. 5596

Nature Communications 5: Article number: 5039 (2014); Published 30 Sep 2014; Updated: 30 Jan 2015 In Fig. 3b, d and f of this Article, the y axis label was inadvertently changed from cm−1 to m−1 during the production process. The correct version of Fig. 3 appears below.

Year: 2015

Language: English

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5 Conference paper

Slow-light enhancement of spontaneous emission in active photonic crystal waveguides

Ek, Sara; Chen, Yaohui; Semenova, Elizaveta; Hansen, Per Lunnemann; Yvind, Kresten; Mørk, Jesper

Proceedings of Spie - the International Society for Optical Engineering — 2012, Volume 8273, Issue 1, pp. 82731A-7

Photonic crystal defect waveguides with embedded active layers containing single or multiple quantum wells or quantum dots have been fabricated. Spontaneous emission spectra are enhanced close to the bandedge, consistently with the enhancement of gain by slow light effects. These are promising

Year: 2012

Language: English

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6 Conference paper

Modelling of Active Semiconductor Photonic Crystal Waveguides and Robust Designs based on Topology Optimization

Chen, Yaohui; Wang, Fengwen; Ek, Sara; Jensen, Jakob Søndergaard; Sigmund, Ole; Mørk, Jesper

Conference Proceedings — 2011, pp. 1-4

In this paper, we present a theoretical analysis of slow-light enhanced light amplification in an active semiconductor photonic crystal line defect waveguide. The impact of enhanced light-matter interactions on propagation effects and local carrier dynamics are investigated in the framework

Year: 2011

Language: English

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