dorsal/arxiv
View SchemaAn optical fiber-based probe for photonic crystal microcavities
| Authors | Kartik Srinivasan, Paul E. Barclay, Matthew Borselli, Oskar Painter |
|---|---|
| Categories | |
| ArXiv ID | physics/0406129 |
| URL | https://arxiv.org/abs/physics/0406129 |
| DOI | 10.1109/JSAC.2005.851212 |
| Journal | IEEE Journal on Selected Areas in Communications (special issue on photonic crystals), Vol. 23, No. 7, pp. 1321-1329, July 2005 |
Abstract
We review a novel method for characterizing both the spectral and spatial properties of resonant cavities within two-dimensional photonic crystals (PCs). An optical fiber taper serves as an external waveguide probe whose micron-scale field is used to source and couple light from the cavity modes, which appear as resonant features in the taper's wavelength-dependent transmission spectrum when it is placed within the cavity's near field. Studying the linewidth and depth of these resonances as a function of the taper's position with respect to the resonator produces quantitative measurements of the quality factor Q and modal volume Veff of the resonant cavity modes. Polarization information about the cavity modes can be obtained by studying their depths of coupling when the cavity is probed along different axes by the taper. This fiber-based technique has been used to measure Q ~ 40,000 and Veff ~ 0.9 cubic wavelengths in a graded square lattice PC microcavity fabricated in silicon. The speed and versatility of this fiber-based probe is highlighted, and a discussion of its applicability to other wavelength-scale resonant elements is given.
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"abstract": "We review a novel method for characterizing both the spectral and spatial\nproperties of resonant cavities within two-dimensional photonic crystals (PCs).\nAn optical fiber taper serves as an external waveguide probe whose micron-scale\nfield is used to source and couple light from the cavity modes, which appear as\nresonant features in the taper\u0027s wavelength-dependent transmission spectrum\nwhen it is placed within the cavity\u0027s near field. Studying the linewidth and\ndepth of these resonances as a function of the taper\u0027s position with respect to\nthe resonator produces quantitative measurements of the quality factor Q and\nmodal volume Veff of the resonant cavity modes. Polarization information about\nthe cavity modes can be obtained by studying their depths of coupling when the\ncavity is probed along different axes by the taper. This fiber-based technique\nhas been used to measure Q ~ 40,000 and Veff ~ 0.9 cubic wavelengths in a\ngraded square lattice PC microcavity fabricated in silicon. The speed and\nversatility of this fiber-based probe is highlighted, and a discussion of its\napplicability to other wavelength-scale resonant elements is given.",
"arxiv_id": "physics/0406129",
"authors": [
"Kartik Srinivasan",
"Paul E. Barclay",
"Matthew Borselli",
"Oskar Painter"
],
"categories": [
"physics.optics"
],
"doi": "10.1109/JSAC.2005.851212",
"journal_ref": "IEEE Journal on Selected Areas in Communications (special issue on\n photonic crystals), Vol. 23, No. 7, pp. 1321-1329, July 2005",
"title": "An optical fiber-based probe for photonic crystal microcavities",
"url": "https://arxiv.org/abs/physics/0406129"
},
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