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Title: Optically anisotropic porous silicon microlenses with tunable refractive indexes and birefringence profiles

Abstract

The effect of spatially varying birefringence on the focusing behavior of porous silicon (PSi) and porous silicon dioxide (PSiO2) gradient refractive index (GRIN) lenses is investigated. Both materials attain broad, tunable refractive indexes and birefringence profiles, with PSi having a maximum birefringence of ~0.26 and PSiO2 a reduced maximum birefringence of ~0.03 at 633 nm. These GRIN lenses exhibit polarization-dependent split focusing behavior, wherein the divergence angle between the twin foci increases with the birefringence gradient. PSi’s large birefringence allows the divergence angle to be tuned such that light focuses away from the center of the lens. These GRIN elements demonstrate how tunable birefringent materials can be used to engineer polarization-selective optical responses.

Authors:
; ; ORCiD logo; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Photonics at Thermodynamic Limits (PTL); California Institute of Technology (CalTech), Pasadena, CA (United States); Stanford Univ., CA (United States); Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI-EFRC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1602879
Alternate Identifier(s):
OSTI ID: 1767775
Grant/Contract Number:  
SC0001293; SC0019140
Resource Type:
Published Article
Journal Name:
Optical Materials Express
Additional Journal Information:
Journal Name: Optical Materials Express Journal Volume: 10 Journal Issue: 4; Journal ID: ISSN 2159-3930
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; optics; phonons; thermal conductivity; charge transport; materials and chemistry by design; mesostructured materials; synthesis (novel materials)

Citation Formats

Ocier, Christian R., Richards, Corey A., Bacon-Brown, Daniel A., Krueger, Neil A., Clawson, Matthew K., Soares, Julio A. N. T., and Braun, Paul V. Optically anisotropic porous silicon microlenses with tunable refractive indexes and birefringence profiles. United States: N. p., 2020. Web. doi:10.1364/OME.385013.
Ocier, Christian R., Richards, Corey A., Bacon-Brown, Daniel A., Krueger, Neil A., Clawson, Matthew K., Soares, Julio A. N. T., & Braun, Paul V. Optically anisotropic porous silicon microlenses with tunable refractive indexes and birefringence profiles. United States. doi:https://doi.org/10.1364/OME.385013
Ocier, Christian R., Richards, Corey A., Bacon-Brown, Daniel A., Krueger, Neil A., Clawson, Matthew K., Soares, Julio A. N. T., and Braun, Paul V. Tue . "Optically anisotropic porous silicon microlenses with tunable refractive indexes and birefringence profiles". United States. doi:https://doi.org/10.1364/OME.385013.
@article{osti_1602879,
title = {Optically anisotropic porous silicon microlenses with tunable refractive indexes and birefringence profiles},
author = {Ocier, Christian R. and Richards, Corey A. and Bacon-Brown, Daniel A. and Krueger, Neil A. and Clawson, Matthew K. and Soares, Julio A. N. T. and Braun, Paul V.},
abstractNote = {The effect of spatially varying birefringence on the focusing behavior of porous silicon (PSi) and porous silicon dioxide (PSiO2) gradient refractive index (GRIN) lenses is investigated. Both materials attain broad, tunable refractive indexes and birefringence profiles, with PSi having a maximum birefringence of ~0.26 and PSiO2 a reduced maximum birefringence of ~0.03 at 633 nm. These GRIN lenses exhibit polarization-dependent split focusing behavior, wherein the divergence angle between the twin foci increases with the birefringence gradient. PSi’s large birefringence allows the divergence angle to be tuned such that light focuses away from the center of the lens. These GRIN elements demonstrate how tunable birefringent materials can be used to engineer polarization-selective optical responses.},
doi = {10.1364/OME.385013},
journal = {Optical Materials Express},
number = 4,
volume = 10,
place = {United States},
year = {2020},
month = {3}
}

Journal Article:
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DOI: https://doi.org/10.1364/OME.385013

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