TY - JOUR
T1 - Tunable and flexible deep-ultraviolet bandpass filters based on micro- and nanoparticle/polydimethylsiloxane hybrid membranes
AU - Zhu, Junfeng
AU - Wan, Lei
AU - Zhao, Chenxi
AU - Sakai, Ryo
AU - Mikami, Yuya
AU - Feng, Tianhua
AU - Chen, Cong
AU - Liu, Weiping
AU - Yoshioka, Hiroaki
AU - Li, Zhaohui
AU - Oki, Yuji
N1 - Funding Information:
This work was supported by the National Key R&D Program of China (Grant No. 2019YFB1803904 ), the National Natural Science Foundation of China (Grant No. 61805104 , 61525502 , 61935013 , 61875076 , 11704156 ), the Fundamental Research Funds for the Central Universities (Grant No. 21619411 ), the Open Project of Wuhan National Laboratory for Optoelectronics (Grant No. 2018WNLOKF015 ), the JSPS KAKENHI ( 19K05310 ), the State Scholarship Fund from the China Scholarship Council (Grant No. 201908050217 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/5
Y1 - 2021/5
N2 - Deep-ultraviolet (DUV) bandpass filters play an important role in the fields of modern environmental disinfection and sterilization. A novel low-cost optical scattering material that can be used to manufacture flexible DUV bandpass filters is proposed. Considering both the refractive index matching condition and Rayleigh-Gans-Debye (RGD) scattering theory, the calcium fluoride (CaF2)-doped polydimethylsiloxane (PDMS) DUV bandpass filter shows over 90% transmittance near the peak wavelength of 272.5 nm. Strain measurements result in relatively stable peak wavelengths with stretching ratios of 12%. A temperature response of 1.5 nm °C−1 is measured experimentally. To simulate the DUV light filtering characteristics of the device, an improved random walk scattering model is developed based on a Monte Carlo numerical simulation. To verify the tunability of the transmittance spectra of the devices, a 10 nm blueshift of the peak wavelength is obtained by doping 50 vol% low-molecular-weight PDMS in the original PDMS matrix, and a 17 nm redshift is observed upon doping 1.4 wt% CdSe/ZnS colloidal quantum dots (CQDs). The realization of tunable and flexible DUV bandpass filters paves the way towards the development of environmental purification equipment and wearable photonic devices.
AB - Deep-ultraviolet (DUV) bandpass filters play an important role in the fields of modern environmental disinfection and sterilization. A novel low-cost optical scattering material that can be used to manufacture flexible DUV bandpass filters is proposed. Considering both the refractive index matching condition and Rayleigh-Gans-Debye (RGD) scattering theory, the calcium fluoride (CaF2)-doped polydimethylsiloxane (PDMS) DUV bandpass filter shows over 90% transmittance near the peak wavelength of 272.5 nm. Strain measurements result in relatively stable peak wavelengths with stretching ratios of 12%. A temperature response of 1.5 nm °C−1 is measured experimentally. To simulate the DUV light filtering characteristics of the device, an improved random walk scattering model is developed based on a Monte Carlo numerical simulation. To verify the tunability of the transmittance spectra of the devices, a 10 nm blueshift of the peak wavelength is obtained by doping 50 vol% low-molecular-weight PDMS in the original PDMS matrix, and a 17 nm redshift is observed upon doping 1.4 wt% CdSe/ZnS colloidal quantum dots (CQDs). The realization of tunable and flexible DUV bandpass filters paves the way towards the development of environmental purification equipment and wearable photonic devices.
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U2 - 10.1016/j.optmat.2021.111073
DO - 10.1016/j.optmat.2021.111073
M3 - Article
AN - SCOPUS:85104127912
SN - 0925-3467
VL - 115
JO - Optical Materials
JF - Optical Materials
M1 - 111073
ER -