Measurement of azo dye film with large photo-induced birefringence and complex refractive index
Azo dyes are valuable functional materials due to their sensitive response to and effective modulation of polarized light. It is essential to find out not only the optical anisotropy but also the complex refractive index of azo dye materials for photonics applications. We report here such measuremen...
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| Veröffentlicht in: | AIP advances 2023-05, Vol.13 (5), p.055006-055006-7 |
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| container_issue | 5 |
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| container_title | AIP advances |
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| creator | Gao, Yiyang Ho, Jacob Y. Tang, Shu-Tuen Zhang, Wanlong Tseng, Man-chun Vashchenko, Olena Vashchenko, Valerii Yeung, Fion Kwok, Hoi-Sing |
| description | Azo dyes are valuable functional materials due to their sensitive response to and effective modulation of polarized light. It is essential to find out not only the optical anisotropy but also the complex refractive index of azo dye materials for photonics applications. We report here such measurements of highly ordered photoaligned azo dye films. The film has an apparent dichroic ratio of about 60. We model the photoaligned azo dye film systems using the Berreman transfer matrix. By means of regression fitting of the polarization dependent transmittance and reflectance data, we were able to determine the complex refractive indices of the aligned film at the wavelength range of 400–1000 nm. This material is found to have exceptionally large optical birefringence (Δn ∼ 0.75 at 632.5 nm and Δn ∼ 0.48 at 850.6 nm). The aligned azo dye film is valuable to applications such as coatable polarizers and optical modulation devices. |
| doi_str_mv | 10.1063/5.0149433 |
| format | Article |
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It is essential to find out not only the optical anisotropy but also the complex refractive index of azo dye materials for photonics applications. We report here such measurements of highly ordered photoaligned azo dye films. The film has an apparent dichroic ratio of about 60. We model the photoaligned azo dye film systems using the Berreman transfer matrix. By means of regression fitting of the polarization dependent transmittance and reflectance data, we were able to determine the complex refractive indices of the aligned film at the wavelength range of 400–1000 nm. This material is found to have exceptionally large optical birefringence (Δn ∼ 0.75 at 632.5 nm and Δn ∼ 0.48 at 850.6 nm). The aligned azo dye film is valuable to applications such as coatable polarizers and optical modulation devices.</description><identifier>ISSN: 2158-3226</identifier><identifier>EISSN: 2158-3226</identifier><identifier>DOI: 10.1063/5.0149433</identifier><identifier>CODEN: AAIDBI</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Anisotropy ; Azo dyes ; Birefringence ; Functional materials ; Light modulation ; Polarized light ; Polarizers ; Refractivity ; Transfer matrices</subject><ispartof>AIP advances, 2023-05, Vol.13 (5), p.055006-055006-7</ispartof><rights>Author(s)</rights><rights>2023 Author(s). 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It is essential to find out not only the optical anisotropy but also the complex refractive index of azo dye materials for photonics applications. We report here such measurements of highly ordered photoaligned azo dye films. The film has an apparent dichroic ratio of about 60. We model the photoaligned azo dye film systems using the Berreman transfer matrix. By means of regression fitting of the polarization dependent transmittance and reflectance data, we were able to determine the complex refractive indices of the aligned film at the wavelength range of 400–1000 nm. This material is found to have exceptionally large optical birefringence (Δn ∼ 0.75 at 632.5 nm and Δn ∼ 0.48 at 850.6 nm). The aligned azo dye film is valuable to applications such as coatable polarizers and optical modulation devices.</description><subject>Anisotropy</subject><subject>Azo dyes</subject><subject>Birefringence</subject><subject>Functional materials</subject><subject>Light modulation</subject><subject>Polarized light</subject><subject>Polarizers</subject><subject>Refractivity</subject><subject>Transfer matrices</subject><issn>2158-3226</issn><issn>2158-3226</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>DOA</sourceid><recordid>eNqdkU1LxDAQhosoKOrBfxDwpFDNZzc9ivixoHjRc5gmk90s3aamWXX99VZX1LNzmWF4eGde3qI4YvSM0UqcqzPKZC2F2Cr2OFO6FJxX23_m3eJwGBZ0LFkzquVeYe4RhlXCJXaZRE_gPRK3RuJDuySvIc9JC2mGpJ_HHMvQuZVFR5qQ0KfQzbCzSKBzxMZl3-Ib-dyDzeEFyQjj20Gx46Ed8PC77xdP11ePl7fl3cPN9PLirrRC61w2tWucoM5Cg44r6aWUE--byqHlSB2daO65oxU0TjIFFidcecpHuygaqcV-Md3ouggL06ewhLQ2EYL5WsQ0M5BysC0a7rymiskKrJZMqBo1dwKBS9A1VGLUOt5o9Sk-r3DIZhFXqRvfN1zTmqtaaDZSJxvKpjgMo--fq4yazziMMt9xjOzphh1syJBD7P4Hv8T0C5reefEBu-KY1g</recordid><startdate>20230501</startdate><enddate>20230501</enddate><creator>Gao, Yiyang</creator><creator>Ho, Jacob Y.</creator><creator>Tang, Shu-Tuen</creator><creator>Zhang, Wanlong</creator><creator>Tseng, Man-chun</creator><creator>Vashchenko, Olena</creator><creator>Vashchenko, Valerii</creator><creator>Yeung, Fion</creator><creator>Kwok, Hoi-Sing</creator><general>American Institute of Physics</general><general>AIP Publishing LLC</general><scope>AJDQP</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0003-2380-6034</orcidid><orcidid>https://orcid.org/0000-0003-3521-3404</orcidid><orcidid>https://orcid.org/0009-0002-5073-1613</orcidid><orcidid>https://orcid.org/0000-0003-4704-9218</orcidid><orcidid>https://orcid.org/0000-0002-2820-9530</orcidid><orcidid>https://orcid.org/0000-0002-5318-0696</orcidid><orcidid>https://orcid.org/0000-0002-6786-8686</orcidid></search><sort><creationdate>20230501</creationdate><title>Measurement of azo dye film with large photo-induced birefringence and complex refractive index</title><author>Gao, Yiyang ; Ho, Jacob Y. ; Tang, Shu-Tuen ; Zhang, Wanlong ; Tseng, Man-chun ; Vashchenko, Olena ; Vashchenko, Valerii ; Yeung, Fion ; Kwok, Hoi-Sing</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c388t-b9dbd30dcabed254f4447ffb6dec2e0d0782f2d06abd415ace725f02149e3b483</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Anisotropy</topic><topic>Azo dyes</topic><topic>Birefringence</topic><topic>Functional materials</topic><topic>Light modulation</topic><topic>Polarized light</topic><topic>Polarizers</topic><topic>Refractivity</topic><topic>Transfer matrices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gao, Yiyang</creatorcontrib><creatorcontrib>Ho, Jacob Y.</creatorcontrib><creatorcontrib>Tang, Shu-Tuen</creatorcontrib><creatorcontrib>Zhang, Wanlong</creatorcontrib><creatorcontrib>Tseng, Man-chun</creatorcontrib><creatorcontrib>Vashchenko, Olena</creatorcontrib><creatorcontrib>Vashchenko, Valerii</creatorcontrib><creatorcontrib>Yeung, Fion</creatorcontrib><creatorcontrib>Kwok, Hoi-Sing</creatorcontrib><collection>AIP Open Access Journals</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>AIP advances</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gao, Yiyang</au><au>Ho, Jacob Y.</au><au>Tang, Shu-Tuen</au><au>Zhang, Wanlong</au><au>Tseng, Man-chun</au><au>Vashchenko, Olena</au><au>Vashchenko, Valerii</au><au>Yeung, Fion</au><au>Kwok, Hoi-Sing</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Measurement of azo dye film with large photo-induced birefringence and complex refractive index</atitle><jtitle>AIP advances</jtitle><date>2023-05-01</date><risdate>2023</risdate><volume>13</volume><issue>5</issue><spage>055006</spage><epage>055006-7</epage><pages>055006-055006-7</pages><issn>2158-3226</issn><eissn>2158-3226</eissn><coden>AAIDBI</coden><abstract>Azo dyes are valuable functional materials due to their sensitive response to and effective modulation of polarized light. It is essential to find out not only the optical anisotropy but also the complex refractive index of azo dye materials for photonics applications. We report here such measurements of highly ordered photoaligned azo dye films. The film has an apparent dichroic ratio of about 60. We model the photoaligned azo dye film systems using the Berreman transfer matrix. By means of regression fitting of the polarization dependent transmittance and reflectance data, we were able to determine the complex refractive indices of the aligned film at the wavelength range of 400–1000 nm. This material is found to have exceptionally large optical birefringence (Δn ∼ 0.75 at 632.5 nm and Δn ∼ 0.48 at 850.6 nm). 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| subjects | Anisotropy Azo dyes Birefringence Functional materials Light modulation Polarized light Polarizers Refractivity Transfer matrices |
| title | Measurement of azo dye film with large photo-induced birefringence and complex refractive index |
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