Refractive index measurement of dielectric samples using highly focused radially polarized light (Invited Paper)

Guadalupe López-Morales; Victor-Manuel Rico-Botero; Rafael Espinosa-Luna; Qiwen Zhan

doi:doi:10.3788/COL201715.030004

Chinese Optics Letters, 2017, 15 (3): 030004, Published Online: Jul. 25, 2018

Refractive index measurement of dielectric samples using highly focused radially polarized light (Invited Paper) Download： 674次

Guadalupe López-Morales ^1,*Victor-Manuel Rico-Botero ¹Rafael Espinosa-Luna ¹Qiwen Zhan ²

Author Affiliations

¹ GIPYS Laboratory, Centro de Investigaciones en Óptica, A. C., León, Gto 37150, México

² Department of Electro-Optics and Photonics, University of Dayton, Dayton, OH 45469, USA

Figures & Tables

Fig. 1. Side view of a collimated illumination field focused into a sample.

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Fig. 2. Radial polarization state of light focused by an objective lens. For any azimuthal angle (φ), the electric field is always in the plane of incidence.

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Fig. 3. Theoretical images generated numerically. Incident beam: (a) x-linear and (b) radial polarization.

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Fig. 4. Schematic diagram for the polarimetric experimental setup.

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Fig. 5. Experimental intensity distributions on the exit pupil plane of the objective lens when the sample is illuminated by: (a) x-linear and (b) radial polarization. Symmetrical dark zones, highlighted by the dashed lines, appear as a consequence of light reaching the Brewster angle.

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Table1. Measurement Results of the Brewster Angle and the Refractive Index of a Sample by Polarimetry

			Incident polarization
Parameter	Reported value	Theoretical value	$x$ -polarized	Radially polarized
$θ_{B}$	56.650	56.590	$56.349 \pm 1.279$	$56.116 \pm 1.502$
$n$	1.519	1.516	$1.504 \pm 0.071$	$1.492 \pm 0.082$

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Guadalupe López-Morales, Victor-Manuel Rico-Botero, Rafael Espinosa-Luna, Qiwen Zhan. Refractive index measurement of dielectric samples using highly focused radially polarized light (Invited Paper)[J]. Chinese Optics Letters, 2017, 15(3): 030004.

Refractive index measurement of dielectric samples using highly focused radially polarized light (Invited Paper) Download： 674次

Fig. 1. Side view of a collimated illumination field focused into a sample.

Fig. 2. Radial polarization state of light focused by an objective lens. For any azimuthal angle (φ), the electric field is always in the plane of incidence.

Fig. 3. Theoretical images generated numerically. Incident beam: (a) x-linear and (b) radial polarization.

Fig. 4. Schematic diagram for the polarimetric experimental setup.

Fig. 5. Experimental intensity distributions on the exit pupil plane of the objective lens when the sample is illuminated by: (a) x-linear and (b) radial polarization. Symmetrical dark zones, highlighted by the dashed lines, appear as a consequence of light reaching the Brewster angle.

Table1. Measurement Results of the Brewster Angle and the Refractive Index of a Sample by Polarimetry

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Refractive index measurement of dielectric samples using highly focused radially polarized light (Invited Paper) Download： 674次

Fig. 1. Side view of a collimated illumination field focused into a sample.

Fig. 2. Radial polarization state of light focused by an objective lens. For any azimuthal angle (φ), the electric field is always in the plane of incidence.

Fig. 3. Theoretical images generated numerically. Incident beam: (a) x-linear and (b) radial polarization.

Fig. 4. Schematic diagram for the polarimetric experimental setup.

Fig. 5. Experimental intensity distributions on the exit pupil plane of the objective lens when the sample is illuminated by: (a) x-linear and (b) radial polarization. Symmetrical dark zones, highlighted by the dashed lines, appear as a consequence of light reaching the Brewster angle.

Table1. Measurement Results of the Brewster Angle and the Refractive Index of a Sample by Polarimetry

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