Perspectives and recent advances in super-resolution spectroscopy: Stochastic and disordered-based approaches

Boschetti, Alice; Pattelli, Lorenzo; Torre, Renato; Wiersma, Diederik S.

doi:10.1063/5.0096519

Cited by 6 publications

(4 citation statements)

References 52 publications

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“…Disorder is ubiquitous and can be found in a large variety of systems ranging from, e.g. fluid dynamics [1], diffusion processes [2] to solids [3,4], biology [5][6][7], spectroscopy [8,9], or towards simulations for quantum computing [10][11][12]. The field of ultracold gases provides a versatile tool for combining quantum gases with disordered systems [13], offering a highly controllable model system for a broad range of applications.…”

Section: Introductionmentioning

confidence: 99%

Characterizing quantum gases in time-controlled disorder realizations using cross-correlations of density distributions

Hiebel,

Nagler,

Barbosa

et al. 2024

New J. Phys.

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The role of disorder on physical systems has been widely studied in the macroscopic and microscopic world. While static disorder is well understood in many cases, the impact of time-dependent disorder on quantum gases is still poorly investigated. In our experimental setup, we introduce and characterize a method capable of producing time-controlled optical-speckle disorder. Experimentally, coherent light illuminates a combination of a static and a rotating diffuser, thereby collecting a spatially varying phase due to the diffusers’ structure and a temporally variable phase due to the relative rotation. Controlling the rotation of the diffuser allows changing the speckle realization or, for future work, the characteristic time scale of the change of the speckle pattern, i.e., the correlation time, matching typical time scales of the quantum gases investigated. We characterize the speckle pattern ex-situ by measuring its intensity distribution cross-correlating different intensity patterns. In- situ, we observe its impact on a molecular Bose-Einstein condensate (BEC) and cross- correlate the density distributions of BECs probed in different speckle realizations. As one diffuser rotates relative to the other around the common optical axis, we trace the optical speckle’s intensity cross-correlations and the quantum gas’ density cross- correlations. Our results show comparable outcomes for both measurement methods. The setup allows us to tune the disorder potential adapted to the characteristics of the quantum gas. These studies pave the way for investigating nonequilibrium physics in interacting quantum gases using controlled dynamical-disorder potentials.

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Section: Introductionmentioning

confidence: 99%

Characterizing quantum gases in time-controlled disorder realizations using cross-correlations of density distributions

Hiebel,

Nagler,

Barbosa

et al. 2024

New J. Phys.

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“…Miniaturized spectrometers with advantages of portability and low cost and power consumption have attracted much attention due to their potential in advanced application scenarios, including wearable devices, hyperspectral imaging, and internet of things. − Computational spectrum reconstruction based on a series of response-modulated photodetectors with a gradient bandgap is one of the most promising methods for achieving such miniaturized spectroscopy systems. − For instance, Yang et al successfully demonstrate a miniaturized spectrometer at the scale of tens of micrometers using a single compositionally graded CdS x Se 1– x nanowire . Recently, halide perovskites have also been used in photodetectors for human visual-like spectrum projection, full-color detection, and multispectral recognition owing to their outstanding properties such as facile solution-process fabrication, excellent light harvesting coefficients, and tunable bandgaps. − Xu et al demonstrated a miniaturized multispectral detector based on a composition-gradient perovskite microwire detector array, offering a response edge ranging from 450 to 790 nm .…”

Section: Introductionmentioning

confidence: 99%

Flexible Microspectrometers Based on Printed Perovskite Pixels with Graded Bandgaps

Huang

Chen

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Miniaturized spectrometers have attracted much attention due to their capability to detect spectral information within a small size. However, such technology still faces challenges including large-scale preparation and performance repeatability. In this work, we overcome these challenges by demonstrating a microspectrometer constructed with a series of pixelized graded-bandgap perovskite photodetectors fabricated with inkjet printing. High-quality perovskite films with minimal pinholes and large grains are deposited by optimizing printing conditions including substrate temperature and surface modification. The resulting perovskite photodetectors show decent photosensing performance, and the different photodetectors based on perovskite films with different bandgaps exhibit various spectral responsivities with different cutoff wavelength edges. Microspectrometers are then constructed with the array of the pixelized graded-bandgap perovskite photodetectors, and incident spectra are algorithmically reconstructed by combining their output currents. The reconstruction performance of the miniaturized spectrometer is evaluated by comparing the results to the spectral curve measured with a commercial bulky spectrometer, indicating a reliable spectral reconstruction with a resolution of around 10 nm. More significantly, the miniaturized spectrometers are successfully fabricated on polymer substrates, and they demonstrate excellent mechanical flexibility. Therefore, this work provides a flexible miniaturized spectrometer with large-scale fabricability, which is promising for emerging applications including wearable devices, hyperspectral imaging, and internet of things.

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“…SMLM relies on the random sparse excitation of fluorescent molecules inside a sample in the spatial domain to achieve the subpixel-precise localization of individual molecules, allowing the accurate reconstruction of objects with spatial resolution finer than that of imaging systems. Inspired by SMLM, Boschetti et al first extended this method to the spectral domain using a random laser (RL), thus developing stochastic optical reconstruction spectroscopy (STORS). − The basic idea of STORS is to perform sparse sampling in the spectral domain, which has two primary requirements for illumination sources . The first is that the emission modes have an appropriate distribution over the spectrum (i.e., sparsity).…”

Section: Introductionmentioning

confidence: 99%

Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy

2023

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Inspired by single-molecule localization microscopy, super-resolution spectroscopy has been achieved by sparse sampling in the spectral domain, where a light source capable of randomly emitting sparse peaks plays a crucial role. Due to the intrinsic feedback mechanism of disordered light scattering, random lasers can provide the desired emission characteristics that facilitate reconstructing the detailed spectral profiles of samples. Here, we propose an all-fiber-configured coherent random laser for spectral measurement to break the instrumental response limitation of spectral detection systems. The laser remains in a chaotic regime and exhibits self-modulating spectral behavior by introducing an elaborately designed spectral tailoring element inside the cavity. The statistical number and distribution of the random peaks over the emission spectrum can be manipulated by adjusting the pump power. In addition, the laser exhibits several attractive features, such as low pumping threshold, narrow-line-width lasing modes, flexible operating wavelength range, high optical signal-to-noise ratio, and easy compatibility with optical fiber systems. Using a low-resolution spectrograph, we experimentally demonstrate super-resolution spectrum reconstruction, obtaining a spectral enhancement of around 3.3. This work provides a powerful illumination source and realization method for high-resolution spectroscopy, which is an essential tool for future optical information applications.

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Perspectives and recent advances in super-resolution spectroscopy: Stochastic and disordered-based approaches

Cited by 6 publications

References 52 publications

Characterizing quantum gases in time-controlled disorder realizations using cross-correlations of density distributions

Characterizing quantum gases in time-controlled disorder realizations using cross-correlations of density distributions

Flexible Microspectrometers Based on Printed Perovskite Pixels with Graded Bandgaps

Coherent Random Fiber Laser-Enabled Super-Resolution Spectroscopy

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