TY  - JOUR
A1  - Schulze, Michael
A1  - Utecht, Manuel Martin
A1  - Moldt, Thomas
A1  - Przyrembel, Daniel
A1  - Gahl, Cornelius
A1  - Weinelt, Martin
A1  - Saalfrank, Peter
A1  - Tegeder, Petra
T1  - Nonlinear optical response of photochromic azobenzene-functionalized self-assembled monolayers
JF  - Physical chemistry, chemical physics : a journal of European Chemical Societies
N2  - The combination of photochromic and nonlinear optical (NLO) properties of azobenzene-functionalized self-assembled monolayers (SAMs) constitutes an intriguing step towards novel photonic and optoelectronic devices. By utilizing the second-order NLO process of second harmonic generation (SHG), supported by density-functional theory and correlated wave function method calculations, we demonstrate that the photochromic interface provides the necessary prerequisites en route towards possible future technical applications: we find a high NLO contrast on the order of 16% between the switching states. These are furthermore accessible reversibly and with high efficiencies in terms of cross sections on the order of 10(-18) cm(2) for both photoisomerization reactions, i.e., drivable by means of low-power LED light sources. Finally, both photostationary states (PSSs) are thermally stable at ambient conditions.
Y1  - 2015
U6  - https://doi.org/10.1039/c5cp03093e
SN  - 1463-9076
SN  - 1463-9084
VL  - 17
IS  - 27
SP  - 18079
EP  - 18086
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Schulze, Michael
A1  - Utecht, Manuel Martin
A1  - Moldt, Thomas
A1  - Przyrembel, Daniel
A1  - Gahl, Cornelius
A1  - Weinelt, Martin
A1  - Saalfrank, Peter
A1  - Tegeder, Petra
T1  - Nonlinear optical response of photochromic azobenzene-functionalized self-assembled monolayers
JF  - Physical chemistry, chemical physics : PCCP ; a journal of European Chemical Societies
N2  - The combination of photochromic and nonlinear optical (NLO) properties of azobenzene-functionalized self-assembled monolayers (SAMs) constitutes an intriguing step towards novel photonic and optoelectronic devices. By utilizing the second-order NLO process of second harmonic generation (SHG), supported by density-functional theory and correlated wave function method calculations, we demonstrate that the photochromic interface provides the necessary prerequisites en route towards possible future technical applications: we find a high NLO contrast on the order of 16% between the switching states. These are furthermore accessible reversibly and with high efficiencies in terms of cross sections on the order of 10−18 cm2 for both photoisomerization reactions, i.e., drivable by means of low-power LED light sources. Finally, both photostationary states (PSSs) are thermally stable at ambient conditions.
Y1  - 2015
U6  - https://doi.org/10.1039/c5cp03093e
SN  - 1463-9076
SN  - 1463-9084
VL  - 27
IS  - 17
SP  - 18079
EP  - 18086
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Schulze, Michael
A1  - Utecht, Manuel Martin
A1  - Hebert, Andreas
A1  - Rück-Braun, Karola
A1  - Saalfrank, Peter
A1  - Tegeder, Petra
T1  - Reversible Photoswitching of the Interfacial Nonlinear Optical Response
JF  - The journal of physical chemistry letters
N2  - Incorporating photochromic molecules into organic/inorganic hybrid materials may lead to photoresponsive systems. In such systems, the second-order nonlinear properties can be controlled via external stimulation with light at an appropriate wavelength. By creating photochromic molecular switches containing self-assembled monolayers on Si(111), we can demonstrate efficient reversible switching, which is accompanied by a pronounced modulation of the nonlinear optical (NLO) response of the system. The concept of utilizing functionalized photoswitchable Si surfaces could be a way for the generation of two-dimensional NLO switching materials, which are promising for applications in photonic and optoelectronic devices.
Y1  - 2015
U6  - https://doi.org/10.1021/jz502477m
SN  - 1948-7185
VL  - 6
IS  - 3
SP  - 505
EP  - 509
PB  - American Chemical Society
CY  - Washington
ER  -