Kerr-rotation imaging in scanning near-field optical microscopy using a modified Sagnac interferometer

Abstract

Articles you may be interested inNanometer-scale imaging of domains in ferroelectric thin films using apertureless near-field scanning optical microscopy Appl.

In-plane magnetization of garnet films imaged by proximal probe nonlinear magneto-optical microscopy

“…12 This corresponds well to the expected value for SNOM with uncoated fiber tips. 10 In transmission mode, the lateral resolution in the linear images cannot be better than 1.8 m, due to the sample thickness and the size of the illumination aperture.…”

“…14 Such instabilities never occurred when a low power cw laser diode was used for illumination. 7,12 We assume that the heating of the setup or the radiation pressure of the focused pulses causes the thin water layer to evaporate from the sample surface. Although the origin of the shear forces is still unclear, we believe that this water layer plays an important role.…”

Modified Sagnac interferometer for high-sensitivity magneto-optic measurements at cryogenic temperatures

“…8,9 However, the rather complicated design limits its uses in magneto-optics; like other MOKE techniques, it is not really suited for low temperature applications due to the need for optical viewports. Kerr rotation sensitivity of 2 rad/ ͱ Hz and Faraday rotation sensitivity of 1 rad/ ͱ Hz have been demonstrated 7 with this technique.…”

Wide Field Magnetic Luminescence Imaging

“…[17,18] Magneto-optical microscopy can offer ultrafast (sub-ps) temporal resolution, but has moderate spatial resolution, [19] unless delicate nearfield approaches are used. [20] Scanning probe techniques such as magnetic force microscopy (MFM) and scanning Hall probe microscopy (SHPM) offer a versatile laboratory-scale platform with high spatial resolution (sub-10 nm for MFM, [21] sub-200 nm for SHPM [22] ), but have poor temporal resolution. [1] Recently, a single spin scanning probe magnetometry technique has been developed [23][24][25][26][27] that uses an optically detected magnetic resonance from a nitrogen vacancy-doped diamond probe to resolve magnetic fields above samples achieving high spatial resolution (sub-20 nm) and high sensitivity (sub-10 µT Hz −½ ), but requires time averaging that limits temporal resolution.…”