Title :
Ultrafast pump-probe photo-induced force microscopy at nanoscale
Author :
Junghoon Jahng ; Brocious, Jordan ; Fishman, Dmitry ; Potma, Eric Olaf
Author_Institution :
Dept. of Phys. & Astron., Univ. of California, Irvine, Irvine, CA, USA
Abstract :
We perform time-resolved pump-probe microscopy measurements by recording the local force between a sharp tip and the photo-excited sample as a readout mechanism for the material´s nonlinear polarization. We show that the photo-induced force is sensitive to the same excited state dynamics as measured in an optical pump-probe experiment. Ultrafast pump-probe force microscopy constitutes a non-optical detection technique with nanoscale resolution that pushes pump-probe sensitivities close to the realm of single molecule studies.
Keywords :
high-speed optical techniques; light polarisation; nonlinear optics; optical microscopy; optical pumping; excited state dynamics; local force; material nonlinear polarization; nanoscale resolution; nonoptical detection technique; optical pump-probe experiment; photoexcited sample; pump-probe sensitivity; readout mechanism; time-resolved pump-probe microscopy measurements; ultrafast pump-probe photoinduced force microscopy; Force; Nonlinear optics; Optical diffraction; Optical pumping; Optical sensors; Optical variables measurement; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
