Fiber-based angular filtering for high-resolution Brillouin spectroscopy in the 20-300 GHz frequency range
arXiv:2011.07645 · doi:10.1364/OE.415228
Abstract
Brillouin spectroscopy emerges as a promising non-invasive tool for nanoscale imaging and sensing. One-dimensional semiconductor superlattice structures are eminently used for selectively enhancing the generation or detection of phonons at few GHz. While commercially available Brillouin spectrometers provide high-resolution spectra, they consist of complex experimental techniques and are not suitable for semiconductor cavities operating at a wide range of optical wavelengths. We develop a pragmatic experimental approach for conventional Brillouin spectroscopy integrating a widely tunable excitation-source. Our setup combines a fibered-based angular filtering and a spectral filtering based on a single etalon and a double grating spectrometer. This configuration allows probing confined acoustic phonon modes in the 20-300 GHz frequency range with excellent laser rejection and high spectral resolution. Remarkably, our scheme based on the excitation and collection of the enhanced Brillouin scattering signals through the optical cavity, allows for better angular filtering for low phonon frequency. It can be implemented for the study of cavity optomechanics and stimulated Brillouin scattering over broadband optical and acoustic frequency ranges.
References in corpus (13)
- Cavity Optomechanics
- Optomechanical Crystals
- Surface Impedance and Bulk Band Geometric Phases in One-Dimensional Systems
- Optomechanical mass spectrometry
- High-performance versatile setup for simultaneous Brillouin-Raman micro-spectroscopy
- Topological nanophononic states by band inversion
- Anderson photon-phonon co-localization in certain random superlattices
- Optomechanical properties of GaAs/AlAs micropillar resonators operating in the 18 GHz range
- Coherent generation and detection of acoustic phonons in topological nanocavities
- Brillouin Scattering in Hybrid Optophononic Bragg Micropillar Resonators at 300 GHz
- Energy transport and coherence properties of acoustic phonons generated by optical excitation of a quantum dot
- Hybrid confinement of optical and mechanical modes in a bullseye optomechanical resonator
- High spectral resolution of GaAs/AlAs phononic cavities by subharmonic resonant pump-probe excitation