Enantiospecific Detection of Chiral Nanosamples Using Photoinduced Force

Kamandi, Mohammad; Albooyeh, Mohammad; Guclu, Caner; Veysi, Mehdi; Zeng, Jinwei; Wickramasinghe, Kumar; Capolino, Filippo

doi:10.1103/physrevapplied.8.064010

Cited by 29 publications

(56 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16 Compared to s-SNOM in which the excitation is in near field and the detection is in the far field, in PiFM both the excitation and detection take place in near field which effectively suppresses the background scattering photons from the far field. 17,18 As a result, PiFM has been widely used for stimulated Raman spectroscopy, 19,20 nanoscale mapping of tightly focused electromagnetic beams 21,22 and propagating surface plasmon polaritons, 23 enantioselectivity of chiral nanostructures, 24,25…”

mentioning

confidence: 99%

Near-field nanoprobing using Si tip-Au nanoparticle photoinduced force microscopy with 120:1 signal-to-noise ratio, sub-6-nm resolution

Rajaei¹,

Almajhadi²,

Zeng³

et al. 2018

Opt. Express

Self Cite

View full text Add to dashboard Cite

A nanoscopy technique that can characterize light-matter interactions with ever increasing spatial resolution and signal-to-noise ratio (SNR) is desired for spectroscopy at molecular levels.Photoinduced force microscopy (PiFM) with Au-coated probe-tips has been demonstrated as an excellent solution for this purpose. However, its accuracy is limited by the asymmetric shape of the Au-coated tip resulting in tip-induced anisotropy. To overcome such deficiencies, we propose a Si tip-Au nanoparticle (NP) combination in PiFM. We map the near-field distribution of the Au NPs in various arrangements with an unprecedented SNR of up to 120, a more than 10-fold improvement compared to conventional optical near-field techniques, and a spatial resolution down to 5.8 nm, smaller than 1/100 of the wavelength, even surpassing the tip-curvature limitation. We also map the beam profile of an azimuthally polarized beam (APB) with an excellent symmetry. The proposed approach can lead to the promising single molecule spectroscopy.Recently the photoinduced force microscopy (PiFM) technique has been developed as a superior near-field optical imaging and spectroscopy technique with both high SNR and nanoscale spatial resolution based on a modified atomic force microscopy (AFM) system. 16 Compared to s-SNOM in which the excitation is in near field and the detection is in the far field, in PiFM both the excitation and detection take place in near field which effectively suppresses the background scattering photons from the far field. 17,18 As a result, PiFM has been widely used for stimulated Raman spectroscopy, 19,20 nanoscale mapping of tightly focused electromagnetic beams 21,22 and propagating surface plasmon polaritons, 23 enantioselectivity of chiral nanostructures, 24,25

show abstract

mentioning

confidence: 99%

Near-field nanoprobing using Si tip-Au nanoparticle photoinduced force microscopy with 120:1 signal-to-noise ratio, sub-6-nm resolution

Rajaei¹,

Almajhadi²,

Zeng³

et al. 2018

Opt. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…See more details in the supplemental materials, and in Refs. 26,27 ). Moreover, we assume that every field is monochromatic and the time dependence exp( ) it   is assumed and suppressed, and the International System of Units (SI) is utilized throughout the paper.…”

Section: ) Objective and Operational Principlementioning

confidence: 99%

“…Note that this dipolar approximation has successfully been exploited to model photo-induced force microscopy in Refs. 23,26,27,33 to extract optical properties of samples. Here, we model the sample with its photo-induced electric and magnetic dipole moments p and m , respectively, given by [34][35][36] polarizabilities α em , and α me and is chosen following Ref.…”

Section: ) Introductionmentioning

confidence: 99%

“…Here, we model the sample with its photo-induced electric and magnetic dipole moments p and m , respectively, given by [34][35][36] polarizabilities α em , and α me and is chosen following Ref. 27 . Before delving into the physical details of our method for probing transverse and longitudinal handedness of chiral particles, it is useful to differentiate chiral nanoparticles from other types of bianisotropic nanoparticles by discussing the properties of magnetoelectric and electromagnetic polarizability tensors.…”

Section: ) Introductionmentioning

confidence: 99%

“…InFig.3we have depicted the z-component of the differential force versus nonzero component of magnetoelectric polarizability for each case normalized to the magnetoelectric polarizability of the isotropic sample sphere studied inFig. 2with 0analytic expression of such a polarizability for a chiral sphere is shown in Ref 27. based on Ref 63. )…”

mentioning

confidence: 99%

See 2 more Smart Citations

Unscrambling Structured Chirality with Structured Light at the Nanoscale Using Photoinduced Force

et al. 2018

Self Cite

View full text Add to dashboard Cite

We introduce a microscopy technique that facilitates the prediction of spatial features of chirality of nanoscale samples by exploiting the photo-induced optical force exerted on an achiral tip in the vicinity of the test specimen. The tip-sample interactive system is illuminated by structured light to probe both the transverse and longitudinal (with respect to the beam propagation direction) components of the sample's magnetoelectric polarizability as the manifestation of its sense of handedness, i.e., chirality. We specifically prove that although circularly polarized waves are adequate to detect the transverse polarizability components of the sample, they are unable to probe the longitudinal component. To overcome this inadequacy and probe the longitudinal chirality, we propose a judiciously engineered combination of radially and azimuthally polarized beams, as optical vortices possessing pure longitudinal electric and magnetic field components along their vortex axis, respectively. The proposed technique may benefit branches of science like stereochemistry, biomedicine, physical and material science, and pharmaceutics. 1) LOCAL FIELDS AT THE TIP-APEX AND SAMPLE LOCATION, EXCITED BY AN ARPBWe prove that under ARPB excitation (a superposition of two coaxial beams: an APB and an RPB with proper phase shift  ) the local fields at the tip-apex and sample locations (both on the ARPB axis, see Fig. 1 of the paper) lack transverse components and we determine the longitudinal field components that include the near-field interaction. We consider the schematic of the problem in Fig. 1 of the manuscript and assume that the tip-apex and chiral sample are located at t z and s z , respectively, at a distance d from each other.

show abstract

Theory of Vector Beams for Chirality and Magnetism Detection of Subwavelength Particles

Hanifeh¹,

Capolino²

2021

Electromagnetic Vortices

View full text Add to dashboard Cite

Enantiospecific Detection of Chiral Nanosamples Using Photoinduced Force

Cited by 29 publications

References 67 publications

Near-field nanoprobing using Si tip-Au nanoparticle photoinduced force microscopy with 120:1 signal-to-noise ratio, sub-6-nm resolution

Near-field nanoprobing using Si tip-Au nanoparticle photoinduced force microscopy with 120:1 signal-to-noise ratio, sub-6-nm resolution

Unscrambling Structured Chirality with Structured Light at the Nanoscale Using Photoinduced Force

Theory of Vector Beams for Chirality and Magnetism Detection of Subwavelength Particles

Contact Info

Product

Resources

About