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Xu MG, Dell JM, Siliquini JF, et al. Near band-edge field-dependent absorption coefficient and refractive index determined by photocurrent and transmittance measurements. Appl Opt. 1999;38(24):5127-32doi: 10.1364/ao.38.005127.
Xu, M. G., Dell, J. M., Siliquini, J. F., & Chavarkar, P. (1999). Near band-edge field-dependent absorption coefficient and refractive index determined by photocurrent and transmittance measurements. Applied optics, 38(24), 5127-32. https://doi.org/10.1364/ao.38.005127
Xu, M G, et al. "Near band-edge field-dependent absorption coefficient and refractive index determined by photocurrent and transmittance measurements." Applied optics vol. 38,24 (1999): 5127-32. doi: https://doi.org/10.1364/ao.38.005127
Xu MG, Dell JM, Siliquini JF, Chavarkar P. Near band-edge field-dependent absorption coefficient and refractive index determined by photocurrent and transmittance measurements. Appl Opt. 1999 Aug 20;38(24):5127-32. doi: 10.1364/ao.38.005127. PMID: 18324007.
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Appl Opt. 1999 Aug 20;38(24):5127-32. doi: 10.1364/ao.38.005127.

Near band-edge field-dependent absorption coefficient and refractive index determined by photocurrent and transmittance measurements.

Applied optics

M G Xu, J M Dell, J F Siliquini, P Chavarkar

Affiliations

  1. Department of Electrical and Electronic Engineering, University of Western Australia, Nedlands, Western Australia 6907, Australia. [email protected]

PMID: 18324007 DOI: 10.1364/ao.38.005127

Abstract

A technique is proposed for the extraction of precise values of field-dependent absorption coefficient alpha and refractive index n from photocurrent and transmittance measurements of optical modulator structures. The technique uses approximate results of alpha and n extracted from a simplified device as the initial input into an iterative procedure that utilizes the consistency between alpha and n to obtain successively better estimates of these parameters. The technique was applied to results that were measured experimentally, and we verified the accuracy by using synthetic data. Errors caused by measurement inaccuracy are also investigated. It is shown that the absorption coefficient has a modest sensitivity whereas the refractive index is insensitive to these errors.

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