Halide perovskites (HPs) are potential game-changing materials for a broad spectrum of
optoelectronic applications ranging from photovoltaics, light-emitting devices, lasers to …

The aim of this article is to provide an introduction to picosecond laser ultrasonics, a means
by which gigahertz–terahertz ultrasonic waves can be generated and detected by ultrashort …

In this article we first present the foundations of ultrafast photoacoustics, a technique where
the acoustic wavelength in play can be considerably shorter than the optical wavelength …

Using an optical technique we generate and detect picosecond shear and quasishear
coherent acoustic phonon pulses in the time domain. Thermoelastic and piezoelectric …

We show for the first time that a single ultrasonic imaging fibre is capable of simultaneously
accessing 3D spatial information and mechanical properties from microscopic objects. The …

Hypersound generation and detection by laser pulses incident on the interface of an opaque
anisotropic crystal are theoretically and experimentally investigated in the case where the …

We report on the occurrence of strong nonlinear acousto-optic interactions in a one-
dimensional model phoxonic cavity that supports, simultaneously, photonic and phononic …

Ultrahigh-frequency acoustic-phonon resonators usually require atomically flat interfaces to
avoid phonon scattering and dephasing, leading to expensive fabrication processes, such …

Picosecond acoustic-phonon pulse generation and detection is investigated in a sample
containing three GaAs∕ Al 0.3 Ga 0.7 As quantum wells of different thickness with an …

Novelty detection has been presented in the literature as one-class problem. In this case,
new examples are classified as either belonging to the target class or not. The examples not …