Charge pumping in InAs nanowires by surface acoustic waves

Abstract

We investigate the interaction between surface acoustic waves on a piezoelectric LiNbO 3 substrate and charge carriers in InAs nanowire transistors. Interdigital transducers are used to excite electromechanical waves on the chip surface and their influence on the transport in the nanowire devices is studied at room temperature. Charge pumping is studied in different biasing conditions and in pulsed operation in order to assess interference effects due to reflected waves on the sample chip. Present results constitute a key building block for the realization of acoustoelectric nanodevices based on the InAs/InP nanowire technology.

Interfacing quantum emitters with propagating surface acoustic waves

“…In this highly active field, SAWs have been successfully employed e.g. to drive an acousto-electric current [187,188], induce charge carrier dynamics [130,154,189] or to study quantum emitters. All approaches require a hybrid approach.…”

Controlling exciton decay dynamics in semiconducting single-walled carbon nanotubes by surface acoustic waves

“…Moreover, these SAWs can be generated all-electrically, either directly on piezoelectric substrates [21] or on arbitrary substrates using piezoelectric coupling layers [22] using interdigital transducer electrodes (IDTs) with a lithographically defined periodicity p. By applying an rf voltage to the IDT with a frequency matching the dispersion relation of a SAW f rf ¼ f SAW ¼ c sound =2p, a SAW of wavelength k SAW ¼ 2p is launched. Such SAW chips are not limited to commercialized applications such as rf filtering in mobile communication devices [23,24] or SAW driven microfluidics [25], but can be directly hybridized with other types of nanosystems such as nanowires and nanotubes to study their optical [26] and electrical transport [27][28][29] properties.…”

Directional and Dynamic Modulation of the Optical Emission of an Individual GaAs Nanowire Using Surface Acoustic Waves

“…In these experiments acoustic conveyance of charges, spins, and dissociated excitons, inherently sequential electron−hole injection, and modulation of the emission wavelength of these planar semiconductor heterostructures have been observed. In contrast, reports on SAW control of isolated one-dimensional nanosystems such as nanotubes and NWs are so far limited to electric transport experiments in which only one carrier species is probed.…”