dorsal/arxiv
View SchemaManipulation of the Spontaneous Emission Dynamics of Quantum Dots in 2D Photonic Crystals
| Authors | A. Kress, F. Hofbauer, N. Reinelt, H. J. Krenner, R. Meyer, G. Boehm, J. J. Finley |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0501013 |
| URL | https://arxiv.org/abs/quant-ph/0501013 |
| DOI | 10.1103/PhysRevB.71.241304 |
| Journal | Phys. Rev. B 71, 241304(R) (2005) |
Abstract
We demonstrate the ability to control the spontaneous emission dynamics of self-assembled quantum dots via the local density of optical modes in 2D-photonic crystals. We show that an incomplete 2D photonic bandgap is sufficient to significantly lengthen the spontaneous emission lifetime ($>2\times$) over a wide bandwidth ($\Delta\lambda\geq40$ nm). For dots that are both \textit{spectrally} and \textit{spatially} coupled to strongly localized ($V_{mode}\sim1.5(\lambda/n)^{3}$), high $Q\sim2700$ optical modes, we have directly measured a strong Purcell enhanced shortening of the emission lifetime $\geq5.6\times$, limited only by our temporal resolution. Analysis of the spectral dependence of the recombination dynamics shows a maximum lifetime shortening of $19\pm4$. From the directly measured enhancement and suppression we show that the single mode coupling efficiency for quantum dots in such structures is at least $\beta=92%$ and is estimated to be as large as $\sim97%$.
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"abstract": "We demonstrate the ability to control the spontaneous emission dynamics of\nself-assembled quantum dots via the local density of optical modes in\n2D-photonic crystals. We show that an incomplete 2D photonic bandgap is\nsufficient to significantly lengthen the spontaneous emission lifetime\n($\u003e2\\times$) over a wide bandwidth ($\\Delta\\lambda\\geq40$ nm). For dots that\nare both \\textit{spectrally} and \\textit{spatially} coupled to strongly\nlocalized ($V_{mode}\\sim1.5(\\lambda/n)^{3}$), high $Q\\sim2700$ optical modes,\nwe have directly measured a strong Purcell enhanced shortening of the emission\nlifetime $\\geq5.6\\times$, limited only by our temporal resolution. Analysis of\nthe spectral dependence of the recombination dynamics shows a maximum lifetime\nshortening of $19\\pm4$. From the directly measured enhancement and suppression\nwe show that the single mode coupling efficiency for quantum dots in such\nstructures is at least $\\beta=92%$ and is estimated to be as large as\n$\\sim97%$.",
"arxiv_id": "quant-ph/0501013",
"authors": [
"A. Kress",
"F. Hofbauer",
"N. Reinelt",
"H. J. Krenner",
"R. Meyer",
"G. Boehm",
"J. J. Finley"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall"
],
"doi": "10.1103/PhysRevB.71.241304",
"journal_ref": "Phys. Rev. B 71, 241304(R) (2005)",
"title": "Manipulation of the Spontaneous Emission Dynamics of Quantum Dots in 2D Photonic Crystals",
"url": "https://arxiv.org/abs/quant-ph/0501013"
},
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