Photorefraction from a Photochromic Soft Material

Livshits, Maksim Y.; Rack, Jeffrey J.

doi:10.1021/acs.jpcc.6b07066

Cited by 5 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A severe disadvantage of these materials, however, is related to the maximum reached diffraction efficiency. Already, in the first proof-of-principle reports of elementary holograms in similar OSO-PDMS samples, η-values of up to ≈ 8 × 10 −6 were reported [14]. Our study here shows very remarkably that it is possible to improve this value by adjusting the OSO concentration, etc., and the use of a professional two-beam interferometer by a factor of about 100.…”

Section: Limitations Of the Hologram Diffraction Efficiencysupporting

confidence: 59%

“…Based on these pre-investigations, the ability to record elementary gratings with promising features for consumer-market holographic applications was proposed [11]. First inspection of the underlying mechanisms are interpreted as index gratings as a result of a causal connection between absorption and index change via Kramers-Kronig relation [4,[12][13][14]. The question about a dominating role of refractive index changes based on pronounced changes of the molecular polarization by means of light-induced structural alterations, as it has been verified for the photoswitchable sodium nitroprusside Na 2 [Fe(CN) 5 NO]•2H 2 O (abbr.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Holographic performance of silicon polymer films based on photoswitchable molecules

Bourdon

Bock

Kijatkin

et al. 2018

Opt. Mater. Express

View full text Add to dashboard Cite

Holographic silicon polymer films based on photoswitchable molecules are studied with respect to their performance for hologram recording, with photoswitchable ruthenium sulfoxide complexes as an example. Our systematic study reveals that it is possible to record elementary holographic lossy gratings with outstanding quality with respect to their dynamics and in-and off-Bragg read-out features. Furthermore, the possibility for the recording of multiple holograms within the same volume element via angular multiplexing as well as the recording with continuous-wave and a fs-laser pulse train is successfully demonstrated. At the same time, a strong limitation of the maximum diffraction efficiency in the order of ∼ 10 −3 is found that cannot be counterbalanced by either the tuning of material (thickness, concentration, ...) or recording parameters (repetition rate, wavelength, ...). This limitation-being severe for any type of holographic applications-is discussed and compared with the performance of high-efficient single-crystalline reference holographic media. We conclude that the potential of sulfoxide compounds may be hidden in holography until it becomes possible to synthesize polymer films with appropriate three-dimensional structural arrangement of the photoswitchable compounds.

show abstract

Section: Limitations Of the Hologram Diffraction Efficiencysupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Holographic performance of silicon polymer films based on photoswitchable molecules

Bourdon

Bock

Kijatkin

et al. 2018

Opt. Mater. Express

View full text Add to dashboard Cite

show abstract

“…Photochromic molecules reversibly switch from one state to another in response to light, converting photonic energy into the internal molecular energy required for molecular rearrangement . Photochromic molecules have been proposed for use as light-activated molecular switches for applications that include photopharmacology, light harvesting, energy storage, and for nonlinear optical materials. − …”

Section: Introductionmentioning

confidence: 99%

Linkage Photoisomerization of an Isolated Ruthenium Sulfoxide Complex: Sequential versus Concerted Rearrangement

et al. 2018

Self Cite

View full text Add to dashboard Cite

Ruthenium sulfoxide complexes undergo thermally reversible linkage isomerization of sulfoxide ligands from S- to O-bound in response to light. Here, we report photoisomerization action spectra for a ruthenium bis-sulfoxide molecular photoswitch, [Ru(bpy)(bpSO)], providing the first direct evidence for photoisomerization of a transition metal complex in the gas phase. The linkage isomers are separated and isolated in a tandem drift tube ion mobility spectrometer and exposed to tunable laser radiation provoking photoisomerization. Direct switching of the S,S-isomer to the O,O-isomer following absorption of a single photon is the predominant isomerization pathway in the gas phase, unlike in solution, where stepwise isomerization is observed with each sulfoxide ligand switching in turn. The change in isomerization dynamics is attributed to rapid vibrational quenching that suppresses isomerization in solution. Supporting electronic structure calculations predict the wavelengths and intensities of the peaks in the photoisomerization action spectra of the S,S- and S,O-isomers, indicating that they correspond to metal-to-ligand charge transfer (MLCT) and ligand-centered ππ* transitions.

show abstract

Wide‐Bandgap Organic Crystals: Enhanced Optical‐to‐Terahertz Nonlinear Frequency Conversion at Near‐Infrared Pumping

Kim

Han

et al. 2020

Advanced Optical Materials

View full text Add to dashboard Cite

Enhanced terahertz (THz) wave generation is demonstrated in nonlinear organic crystals through refractive index engineering, which improves phase matching characteristics substantially. Unlike conventional low‐bandgap nonlinear organic crystals, the newly designed benzimidazolium‐based HMI (2‐(4‐hydroxy‐3‐methoxystyryl)‐1,3‐dimethyl‐1H‐benzoimidazol‐3‐ium) chromophore possesses a relatively wide bandgap. This reduces the optical group index in the near‐infrared, allowing better phase matching with the generated THz waves, and leads to high optical‐to‐THz conversion. A unique feature of the HMI‐based crystals, compared to conventional wide‐bandgap aniline‐based crystals, is their remarkably larger macroscopic optical nonlinearity, a one order of magnitude higher diagonal component in macroscopic nonlinear susceptibility than NPP ((1‐(4‐nitrophenyl)pyrrolidin‐2‐yl)methanol) crystals. The HMI‐based crystals also exhibit much higher thermal stability, with a melting temperature Tm above 250 °C, versus aniline‐based crystals (116 °C for NPP). With pumping at the technologically important wavelength of 800 nm, the proposed HMI‐based crystals boost high optical‐to‐THz conversion efficiency, comparable to benchmark low‐bandgap quinolinium crystals with state‐of‐the‐art macroscopic nonlinearity. This performance is due to the excellent phase matching enabled by decreasing optical group indices in the near‐infrared through wide‐bandgap chromophores. The proposed wide‐bandgap design is a promising way to control the refractive index of various nonlinear organic materials for enhanced frequency conversion processes.

show abstract

Photorefraction from a Photochromic Soft Material

Cited by 5 publications

References 34 publications

Holographic performance of silicon polymer films based on photoswitchable molecules

Holographic performance of silicon polymer films based on photoswitchable molecules

Linkage Photoisomerization of an Isolated Ruthenium Sulfoxide Complex: Sequential versus Concerted Rearrangement

Wide‐Bandgap Organic Crystals: Enhanced Optical‐to‐Terahertz Nonlinear Frequency Conversion at Near‐Infrared Pumping

Contact Info

Product

Resources

About