Hybrid near-field optical memory and photofabrication in dye-doped polymer film

Shen, Yuzhen; Swiatkiewicz, Jacek; Prasad, Paras N.; Vaia, Richard A.

doi:10.1016/s0030-4018(01)01602-9

Cited by 21 publications

(16 citation statements)

References 21 publications

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“…At the same time, semiconductor polymers are fascinating materials for studying nonlinear optical effects such as two-photon absorption (2PA). Organic materials for 2PA are interesting for applications in 3D micro-fabrication and micromachining [ 7 , 8 , 9 , 10 ], 3D data storage [ 11 , 12 ], optical power limiting [ 13 , 14 ], two-photon induced photopolymerization [ 15 ], two-photon pumped laser [ 16 ], and so on. The key feature for such applications is the quadratic dependence of the 2PA process on the excitation irradiance, which provides spatial confinement of excitation [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Two-Photon Absorption Spectroscopy of Poly(fluorene) Derivatives Containing Benzoselenadiazole and Benzothiadiazole

et al. 2017

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We have investigated the molecular structure and two-photon absorption (2PA) properties relationship of two push–pull poly(fluorene) derivatives containing benzoselenadiazole and benzothiadiazole units. For that, we have used the femtosecond wavelength-tunable Z-scan technique with a low repetition rate (1 kHz) and an energy per pulse on the order of nJ. Our results show that both 2PA spectra present a strong 2PA (around 600 GM (1 GM = 1 × 10−50 cm4·s·photon−1)) band at around 720 nm (transition energy 3.45 eV) ascribed to the strongly 2PA-allowed 1Ag-like → mAg-like transition, characteristic of poly(fluorene) derivatives. Another 2PA band related to the intramolecular charge transfer was also observed at around 900 nm (transition energy 2.75 eV). In both 2PA bands, we found higher 2PA cross-section values for the poly(fluorene) containing benzothiadiazole unit. This outcome was explained through the higher charge redistribution at the excited state caused by the benzothiadiazole group as compared to the benzoselenadiazole and confirmed by means of solvatochromic Stokes shift measurements. To shed more light on these results, we employed the sum-over-states approach within the two-energy level model to estimate the maximum permanent dipole moment change related to the intramolecular charge transfer transition.

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Section: Introductionmentioning

confidence: 99%

Femtosecond Two-Photon Absorption Spectroscopy of Poly(fluorene) Derivatives Containing Benzoselenadiazole and Benzothiadiazole

et al. 2017

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“…SU‐8 (Microchem Inc), which contains a small amount of photoacid generator was used as a negative photoresist. A two photon dye, AF380 (provided by US Air Force Research Laboratory, OH), photosensitized the mixture to 800 nm laser light 28. AF380, the gold precursor (HAuCl 4 ·3H 2 O Sigma‐Aldrich) and SU‐8 were dissolved in cyclopentanone, which is a good solvent for both SU‐8 and HAuCl 4 ·3H 2 O.…”

Section: Methodsmentioning

confidence: 99%

Two‐Photon Lithography of Sub‐Wavelength Metallic Structures in a Polymer Matrix

et al. 2010

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A novel method for fabricating metallic nanostructures with sub‐wavelength resolution in a polymer using simultaneous two‐photon initiated reduction of a metal salt and polymerization of a negative photoresist is demonstrated. Gold nanoparticle‐doped lines as narrow as 200 nm were fabricated. The dependence of line‐width on laser intensity and scan speed are captured well by an analytical model. We created functional gratings and planar chiral elements, characterized their optical properties, and modeled their electromagnetic response.

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“…The incorporation of organic dye molecules in organic,1 inorganic,2 or hybrid3 hosts is of particular interest in many different areas of materials and analytical chemistry. Potential fields of application include the development of photonic devices and materials such as waveguide laser cavities,4 optical memory systems,5 electroluminescent devices,6 artificial antenna systems,7 radiation detectors,8 optical switches,9 as well as the construction of optical sensors 10. Among host–guest assemblies, zeolites and zeolitic molecular sieves have proved to be very convenient hosts 11…”

Section: Introductionmentioning

confidence: 99%

Fluorescent Hydroxyflavone–Zeolite Nanoparticles: Ship‐in‐a‐Bottle Synthesis and Photophysical Properties

et al. 2006

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3-Hydroxyflavone (3-OHF) was incorporated in zeolite micropores by ship-in-a-bottle synthesis. This strategy consists of constructing the molecule by reaction of small precursors within the cavity. 3-OHF molecules exhibit excited-state intramolecular proton transfer (ESIPT) and a tautomeric equilibrium between the 3-OHF-excited structures N* and T*exists. This equilibrium is strongly affected by the protic nature and polarity of the surrounding medium. The textural and spectroscopic characterization of the dye-loaded zeolite colloids enabled the study of the correlation between the optical properties of the dye and the zeolite micropore environment.

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Hybrid near-field optical memory and photofabrication in dye-doped polymer film

Cited by 21 publications

References 21 publications

Femtosecond Two-Photon Absorption Spectroscopy of Poly(fluorene) Derivatives Containing Benzoselenadiazole and Benzothiadiazole

Femtosecond Two-Photon Absorption Spectroscopy of Poly(fluorene) Derivatives Containing Benzoselenadiazole and Benzothiadiazole

Two‐Photon Lithography of Sub‐Wavelength Metallic Structures in a Polymer Matrix

Fluorescent Hydroxyflavone–Zeolite Nanoparticles: Ship‐in‐a‐Bottle Synthesis and Photophysical Properties

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