Abstract:We present a simple one-step selective liquid-phase epitaxy (LPE) method to prepare peelable GaAs pyramidal microtips for compact scanning near-field optical microscopy (SNOM). A high Al content AlGaAs thin layer, as an etching sacrificial layer, is firstly selectively grown in periodic square windows of SiO 2 mask deposited on GaAs substrate, and then GaAs is grown on the AlGaAs layer to automatically form peelable pyramidal microtip array. After the growth of the microtip array, the wafer is immersed into co… Show more
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