Nonlinear optical property of azo-dye doped liquid crystals determined by biphotonic Z-scan technique

Fuh, Andy Ying–Guey; Lin, Hong‐Ping; Mo, Ting; Chen, Ching-Hsu

doi:10.1364/opex.13.010634

Cited by 39 publications

(17 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For holographic display, a large nonlinearity would translate into a lower threshold of laser power. Quite different from photochromic polymers, whose nonlinearity is caused by a conformational change, LCs rotate their molecular axes without changing in shape [44,45]. This in part explains the large nonlinearity they have.…”

Section: Photochromic Liquid Crystals Mechanismmentioning

confidence: 98%

“…Another important finding is the ceiling of the recording intensity, over which the as-recorded gratings becomes vanished. This arises from the thermal effect [44] that would heat LC to its clearing point, at which LC turns out to be isotropic. For its quick response, the authors realize a video-rate holographic display with a refresh rate of 25 Hz.…”

Section: Dr1-doped Nematic Lc(5cb)mentioning

confidence: 99%

See 1 more Smart Citation

Recent advances in holographic recording media for dynamic holographic display

Chen¹,

Su²,

Jhun³

2014

J Opt Photonics

View full text Add to dashboard Cite

An overview of the recent advances in the state-of-the-art holographic recoding media dedicated to the dynamic holography display is presented in this paper. Unlike the traditional holographic media, those materials enable the holograms to be updatable rather than permanent like before. Over the past few years, a number of material recipes for this use have been disclosed and can be mainly divided into four classesphotorefractive/photochromic polymers and photorefractive/photochromic liquid crystals. Focusing on five key material properties related to the display application, including diffraction efficiency, applied electric field, recording intensity, rise time and memory, the important findings as well as the underlying mechanisms are unraveled with in-depth discussion. Moreover, a comparison of the four classes of materials is provided, followed by a projection of the potential challenges.

show abstract

Section: Photochromic Liquid Crystals Mechanismmentioning

confidence: 98%

Section: Dr1-doped Nematic Lc(5cb)mentioning

confidence: 99%

Recent advances in holographic recording media for dynamic holographic display

Chen¹,

Su²,

Jhun³

2014

J Opt Photonics

View full text Add to dashboard Cite

show abstract

“…Photoisomerization of azo-molecules makes it easy to modify linear and nonlinear polarizabilities of molecular as well as optical nonlinear refraction. The optical properties of azo-polymer can be controlled optically, which aroused considerably the interest of people [4,5].…”

Section: Introductionmentioning

confidence: 99%

Preparation and third-order nonlinear optical property of poly(urethane-imide) containing dispersed red chromophore

Qiu¹,

Yang²,

Li³

et al. 2008

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract.A novel poly(urethane-imide) (PUI) containing dispersed red chromophore was synthesized. The PUI was characterized by FT-IR, UV-Vis, DSC and TGA. The results of DSC and TGA indicated that the PUI exhibited high thermal stability up to its glass-transition temperature (Tg) of 196°C and 5% heat weight loss temperature of 229°C. According to UV-Vis spectrum and working curve, the maximum molar absorption coefficient and absorption wavelength were measured. They were used to calculate the third-order nonlinear optical coefficient χ (3) . At the same time, the chromophore density of PUI, nonlinear refractive index coefficient and molecular hyperpolarizability of PUI were obtained. The fluorescence spectra of PUI and model compound DR-19 were determined at excitation wavelength 300 nm. The electron donor and acceptor in polymer formed the exciplex through the transfer of the electric charges. The results show that the poly(urethane-imide) is a promising candidate for application in optical devices.

show abstract

“…Photoisomerization of azomolecules enables them easy to modify linear and nonlinear polarizability of molecular as well as optical nonlinear refraction. Since the optical properties of azopolymer can be controlled optically, it has intrigued the considerable interest of people [3][4][5]. Both guest-host and sidechain polymers have been extensively studied, and the search for large nonlinear optical response polymers is still in progress [6].…”

Section: Introductionmentioning

confidence: 99%

Third‐order optical nonlinearity of azobenzene side‐chain polymer thin film

He¹,

Cheng²,

Wang³

et al. 2007

Physica Status Solidi (b)

View full text Add to dashboard Cite

This paper reports both the nonlinear refractive index and nonlinear absorption coefficient of an azobenzene side-chain polymer measured by a single-beam Z-scan technique under 532 nm and 1064 nm excitation. Experimental results at 532 nm excitation show large optical nonlinearity and nonlinear absorption coefficient induced by the trans -cis transition in the dye molecule with γ being -9.46 × 10 -12 cm 2 /W with β = -285.29 cm/GW, respectively. Under 1064 nm excitation, the large nonlinearity induced by the nonresonant electronic effect with γ = 4.57 × 10 -12 cm 2 /W is obtained.

show abstract

Nonlinear optical property of azo-dye doped liquid crystals determined by biphotonic Z-scan technique

Cited by 39 publications

References 15 publications

Recent advances in holographic recording media for dynamic holographic display

Recent advances in holographic recording media for dynamic holographic display

Preparation and third-order nonlinear optical property of poly(urethane-imide) containing dispersed red chromophore

Third‐order optical nonlinearity of azobenzene side‐chain polymer thin film

Contact Info

Product

Resources

About