Wavelength dependence of photothermal deflection in Au/Si bimaterial microcantilevers

Ramaiah, M. Raghu; Prabakar, K.; Sundari, S. Tripura; Dhara, Sandip

doi:10.1016/j.sna.2020.112233

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…These intriguing microcomponents have garnered considerable attention in scientific research and have been integral to multidisciplinary studies, given their advantages of high sensitivity [3,4], enhanced reliability [5], and rapid response [6]. In parallel with the development of functional microstructures, the exploration of physico-chemical behavior has unveiled a realm where practical observations on localized nano-objects, under both natural and artificial conditions [7,8], play a pivotal role. This exploration has led to the recognition that these nano-objects can induce distinct shifts in dynamic behavior [9], such as deformation and resonance, arising from various multiphysical parameters.…”

Section: Introductionmentioning

confidence: 99%

Theoretical prediction of proteins network-induced nonlocal response in molecules-resonator biosensor with hydrogen bonds including van der waals interactions

Bourouina,

Boussendel

2024

Phys. Scr.

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This study investigates the dynamic behavior of a biomolecule-resonator system including the shear distortion effect as well as adsorption energy and small scale effects. The nano-object network-induced energy is determined using a distributional approach for both bio-receptor and spike protein where vibration energy model for functional microbeam is derived including surface stress effect. The functional microbeam approach and the localized bio-object approach are applied in conjunction with the van der Waals (vdW) interaction mechanism using Lennard-Jones (6-12) potential to compute the total influence of contributed conditions. Both explicit inertia moment and shear force are developed from the nonlocal Timoshenko beam equations which the residual stress effect is considered as an additive load. Numerical results showed that the computed frequency shift is depended on each of the active surface, localized biomolecules and adsorbed adatoms. Computation indicates that the receptor and spike network should be considered and thus derived model for biosensor micostructure is suitable to investigate the dynamic behavior of the biomolecule-resonator system that can be applied for biosensing technology applications.

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Section: Introductionmentioning

confidence: 99%

Theoretical prediction of proteins network-induced nonlocal response in molecules-resonator biosensor with hydrogen bonds including van der waals interactions

Bourouina,

Boussendel

2024

Phys. Scr.

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“…Compared with photon IR detectors, uncooled IR detectors are more widely used in the non-military field for their ability to work at ambient temperature, which brings lower cost and power consumption. Furthermore, among various types of uncooled detectors, the optomechanical detectors based on the thermal response of bi-material micro-cantilever have been researched a lot [11,12] and shown significant potentials [13][14][15][16] for their simple fabricating, cost-reducing, and more importantly, readout integrated circuits(ROIC) removing [10]. So that the parasitic heat from ROIC is eliminated and there is no thermal leakage path caused by the electrical contacts between pixels and substrate.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of optomechanical uncooled infrared focal plane array with integrated metalens

Luo,

Hou,

Zhang

et al. 2023

Phys. Scr.

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Optomechanical uncooled infrared (IR) detectors based on the thermal deformation of bi-material micro-cantilever have proved of significant potential in the IR imaging fields. However, compared to other uncooled infrared detectors, the optomechanical type relies on the mechanical deformation of the thermomechanical cantilevers, which compete for space with the absorbers and isolation beams, resulting in limited sensitivity. By integrating a designed metalens, large deformation, high thermal isolation, and high effective fill factor can be achieved simultaneously. Several pixel designs of optomechanical uncooled IR focal plane array (FPA) with designed integrated metalens are evaluated and optimized through numerical simulation. High thermal conversion efficiency H = 0.016 and thermomechanical sensitivity S T = 0.264 μm K−1 are simultaneously achieved with an inherent noise-equivalent temperature difference(NETD) value of 3.9 mK at the preset 60 μ m × 60 μ m pixels. Using Figure of Merit(FOM) as a comprehensive evaluation of NETD and response time, the optimized structure can be improved by up to 40% over the original structure.

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Sample characterization by transverse photothermal beam deflection spectrometry in skimming configuration

Budasheva

Swapna

Sankararaman

et al. 2023

Journal of Applied Physics

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The Tutorial presents the theoretical aspects of photothermal beam deflection spectrometry (BDS) in skimming configuration based on the complex ray theory. After a brief introduction on photothermal spectroscopy, an abridged review of the literature highlighting the theoretical building blocks and its diversified applications is given. The complex ray theory-based 1D and 2D models for evaluating thermophysical, optical, transport, and structural parameters are discussed in detail. The experimental setup, optimization, and applications of the BDS are further elaborated upon.

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Wavelength dependence of photothermal deflection in Au/Si bimaterial microcantilevers

Cited by 3 publications

References 31 publications

Theoretical prediction of proteins network-induced nonlocal response in molecules-resonator biosensor with hydrogen bonds including van der waals interactions

Theoretical prediction of proteins network-induced nonlocal response in molecules-resonator biosensor with hydrogen bonds including van der waals interactions

Optimal design of optomechanical uncooled infrared focal plane array with integrated metalens

Sample characterization by transverse photothermal beam deflection spectrometry in skimming configuration

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