Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid Crystals
We report continuously tunable and bandwidth variable optical notch and band-pass filters created by combining four left- and right-handed circular cholesteric liquid crystal cells without extra optical components. Filter performance was greatly improved by introducing an anti-reflection layer on th...
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8558101/ |
| _version_ | 1818369875231375360 |
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| author | Mi-Yun Jeong Keumcheol Kwak |
| author_facet | Mi-Yun Jeong Keumcheol Kwak |
| author_sort | Mi-Yun Jeong |
| collection | DOAJ |
| description | We report continuously tunable and bandwidth variable optical notch and band-pass filters created by combining four left- and right-handed circular cholesteric liquid crystal cells without extra optical components. Filter performance was greatly improved by introducing an anti-reflection layer on the filter device. The filter comprised cholesteric liquid crystal wedge cells with continuous pitch gradient. The band wavelength position was spatially tuned from 470 nm to 1000 nm. The notch filters are polarization-independent in the spectral ranges. The band pass filters can be designed to be polarization-independent or polarization-dependent via cell alignment and the bandwidth can be reversibly controlled from the original bandwidth (60~18 nm). These tunable filter strategies could make a paved road to wavelength tunable spectroscopic instruments applications in the VIS and near infrared response spectral range. |
| first_indexed | 2024-12-13T23:30:47Z |
| format | Article |
| id | doaj.art-4a16222d5bd8432ab8c53abff3051808 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-13T23:30:47Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-4a16222d5bd8432ab8c53abff30518082022-12-21T23:27:25ZengIEEEIEEE Photonics Journal1943-06552019-01-0111111110.1109/JPHOT.2018.28849658558101Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid CrystalsMi-Yun Jeong0https://orcid.org/0000-0003-1893-8753Keumcheol Kwak1Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Jinju, South KoreaSchool of Electronics and Electrical Engineering, Sungkyunkwan University, Suwon, South KoreaWe report continuously tunable and bandwidth variable optical notch and band-pass filters created by combining four left- and right-handed circular cholesteric liquid crystal cells without extra optical components. Filter performance was greatly improved by introducing an anti-reflection layer on the filter device. The filter comprised cholesteric liquid crystal wedge cells with continuous pitch gradient. The band wavelength position was spatially tuned from 470 nm to 1000 nm. The notch filters are polarization-independent in the spectral ranges. The band pass filters can be designed to be polarization-independent or polarization-dependent via cell alignment and the bandwidth can be reversibly controlled from the original bandwidth (60~18 nm). These tunable filter strategies could make a paved road to wavelength tunable spectroscopic instruments applications in the VIS and near infrared response spectral range.https://ieeexplore.ieee.org/document/8558101/Optical devicesoptical filterliquid crystal devicesphotonic crystal filter |
| spellingShingle | Mi-Yun Jeong Keumcheol Kwak Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid Crystals IEEE Photonics Journal Optical devices optical filter liquid crystal devices photonic crystal filter |
| title | Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid Crystals |
| title_full | Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid Crystals |
| title_fullStr | Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid Crystals |
| title_full_unstemmed | Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid Crystals |
| title_short | Continuously Tunable and Bandwidth Variable Optical Notch/Band-Pass Filters Over 500 nm Spectral Range Using Cholesteric Liquid Crystals |
| title_sort | continuously tunable and bandwidth variable optical notch x002f band pass filters over 500 nm spectral range using cholesteric liquid crystals |
| topic | Optical devices optical filter liquid crystal devices photonic crystal filter |
| url | https://ieeexplore.ieee.org/document/8558101/ |
| work_keys_str_mv | AT miyunjeong continuouslytunableandbandwidthvariableopticalnotchx002fbandpassfiltersover500nmspectralrangeusingcholestericliquidcrystals AT keumcheolkwak continuouslytunableandbandwidthvariableopticalnotchx002fbandpassfiltersover500nmspectralrangeusingcholestericliquidcrystals |