Ultrafast Giant Photostriction of Epitaxial Strontium Iridate Film with Superior Endurance.

Photostriction, optical stimulus driven mechanical deformation in materials, provides a solution toward next-generation technology. Here, the giant photostriction (∼2% change of lattice) of epitaxial strontium iridate (SrIrO3) films under illumination at room temperature is revealed via power-dependent Raman scattering, which is significantly larger as compared to conventional inorganic materials. The time scale and mechanism of this giant photostriction in SrIrO3 are further studied through time-resolved transient reflectivity measurements. The main mechanism is determined to be the electron-phonon coupling. In addition, we find that such an exotic behavior happens within few picoseconds and remains up to 107 cyclic on/off operations. The observation of giant photostriction in SrIrO3 films with superior endurance promises the advance of shape responsive solids that are sensitive to environmental stimuli, which could be widely utilized for multifunctional optoelectronics and optomechanical devices.

[1]  Y. Chu,et al.  Magnetic-coupled phase anomaly in mixed-phase BiFeO3 thin films , 2017 .

[2]  Jr-hau He,et al.  Photostriction of CH3NH3PbBr3 Perovskite Crystals , 2017, Advanced materials.

[3]  D. Tsai,et al.  Photostriction of strontium ruthenate , 2017, Nature Communications.

[4]  J. Pulikkotil,et al.  k− dependent Jeff=12 band splitting and the electron-hole asymmetry in SrIrO3 , 2017 .

[5]  S. Wilson,et al.  A charge density wave-like instability in a doped spin-orbit-assisted weak Mott insulator. , 2017, Nature materials.

[6]  M. Guennou,et al.  Photovoltaics with Ferroelectrics: Current Status and Beyond , 2016, Advanced materials.

[7]  L. You,et al.  Giant photostriction in organic–inorganic lead halide perovskites , 2016, Nature Communications.

[8]  Jr-hau He,et al.  Strain‐Mediated Inverse Photoresistivity in SrRuO3/La0.7Sr0.3MnO3 Superlattices , 2016 .

[9]  B. Kundys.  Photostrictive materials , 2015, 1503.01642.

[10]  V. Gusev,et al.  Physical mechanisms of coherent acoustic phonons generation by ultrafast laser action. , 2015, Ultrasonics.

[11]  J. Nichols,et al.  Compressive strain-induced metal–insulator transition in orthorhombic SrIrO_3 thin films , 2014, 1406.6640.

[12]  Takayoshi Kobayashi,et al.  Ultrafast photoinduced mechanical strain in epitaxial BiFeO3 thin films , 2012 .

[13]  Y. Chueh,et al.  Epitaxial photostriction-magnetostriction coupled self-assembled nanostructures. , 2012, ACS nano.

[14]  M. Gibbs,et al.  Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3 , 2012, 1207.0314.

[15]  Orphée Cugat,et al.  Magnetostrictive–piezoelectric composite structures for energy harvesting , 2011 .

[16]  J. M. Chen,et al.  Ultrafast thermoelastic dynamics of HoMnO3 single crystals derived from femtosecond optical pump–probe spectroscopy , 2011 .

[17]  D. Kundys,et al.  Light-induced size changes in BiFeO3 crystals. , 2010, Nature materials.

[18]  E. Liarokapis,et al.  Evaluation of the strains in charge-ordered Pr1−xCaxMnO3 thin films using Raman spectroscopy , 2008 .

[19]  Liyong Tong,et al.  Theoretical investigation on wireless vibration control of thin beams using photostrictive actuators , 2008 .

[20]  Liyong Tong,et al.  Modeling of wireless remote shape control for beams using nonlinear photostrictive actuators , 2007 .

[21]  G. Lucazeau,et al.  Effect of pressure and temperature on Raman spectra of solids: anharmonicity , 2003 .

[22]  J. Let́ard,et al.  Structural characterization of a photoinduced molecular switch. , 2002, Journal of the American Chemical Society.

[23]  Panos G. Datskos,et al.  Chemical detection based on adsorption-induced and photoinduced stresses in microelectromechanical systems devices , 2001 .

[24]  Kenji Uchino,et al.  New applications of photostrictive ferroics , 1997 .

[25]  Philipp Gütlich,et al.  Thermal and Optical Switching of Iron(II) Complexes , 1994 .

[26]  H. Gatos,et al.  Photomechanical vibration of thin crystals of polar semiconductors , 1974 .

[27]  H. Gatos,et al.  Photomechanical Effect in Noncentrosymmetric Semiconductors-CdS , 1972 .

[28]  T. Figielski,et al.  Photostriction Effect in Germanium , 1961, 1961.