Influence of metal doping on optical properties of Si nanoparticles

Evlyukhin, Andrey B.; Степанов, А. Л.; Dmitriev, A. V.; Akhmanov, A. S.; Баграташвили, В.Н.; Chichkov, Boris N.

doi:10.1016/j.optcom.2013.12.010

Cited by 14 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Calculations for the Si-particles covered by random clusters of gold nanoparticles (Fig. 4b) were performed within the discrete dipole approximation assuming the presence of random metal-particle clusters (the details of the calculation technique can be found elsewhere) 14 . Dielectric permittivities of Si and Au were taken from 15 and 16 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Nano-Antennas Based on Silicon-Gold Nanostructures

Kucherik

Kutrovskaya

Osipov

et al. 2019

Sci Rep

View full text Add to dashboard Cite

We experimentally realize nano-antennas based on hybrid silicon-gold nanoparticles (NPs). The silicon particles covered by clusters of small metal NPs are fabricated from a liquid phase under the effect of the laser irradiation. The complex nanoclusters containing both Si and Au components provide the enhancement of the near-field intensity and the resonant light scattering associated with excitation of multipole resonances in NPs. A strong sensitivity of the resonant light absorption to the hybrid particle size and material parameters is experimentally documented and theoretically discussed. The results demonstrate a high potentiality of the hybrid NPs for the realization of functional optical devices and metasurfaces.

show abstract

Section: Resultsmentioning

confidence: 99%

Nano-Antennas Based on Silicon-Gold Nanostructures

Kucherik

Kutrovskaya

Osipov

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Details of this method can be found elsewhere 15 21 . Briefly, the scattering object is replaced by a cubic lattice of electric point dipoles with a polarizability α j 32 . The corresponding dipole moment p j induced in each lattice point j (with the radius-vector r j ) is found by solving coupled-dipole equations.…”

Section: Methodsmentioning

confidence: 99%

Optical spectroscopy of single Si nanocylinders with magnetic and electric resonances

Evlyukhin

Eriksen

Cheng

et al. 2014

Sci Rep

View full text Add to dashboard Cite

Resonant electromagnetic properties of nanoparticles fabricated from high-index semiconductor or dielectric materials are very promising for the realization of novel nanoantennas and metamaterials. In this paper we study optical resonances of Si nanocylinders located on a silica substrate. Multipole analysis of the experimental scattering spectra, based on the decomposed discrete dipole approximation, confirms resonant excitation of electric and magnetic dipole modes in the Si nanocylinders. Influences of light polarization and incident angle on the scattering properties of the nanocylinders are studied. It is shown that the dependence of resonant excitation of the electric and magnetic modes in the nanocylinders on incident angle and polarization of light allows controlling and manipulating the scattered light in this system. The demonstrated properties of Si nanocylinders can be used for the realization of dielectric metasurfaces with different functional optical properties.

show abstract

“…[ 1–5 ] Besides rather limited dangling‐bond absorption of electromagnetic waves in amorphous nanosilicon, broadly variable free‐carrier absorption (free‐carrier concentration ≈10 17 cm −3 ) [ 4 ] in controllably doped silicon has recently brought another important modality to Si NPs, related to space‐selective in situ anti‐cancer hyperthermia‐based therapies via near‐ and mid‐infrared (IR) laser, or radiofrequency (RF) Joule heating. [ 4,6 ] However, to date strong Si–NP doping was realized only via minor introduction of gold, [ 7 ] since Si is rather immiscible material. [ 8 ]…”

Section: Figurementioning

confidence: 99%

Multifunctional Sulfur‐Hyperdoped Silicon Nanoparticles with Engineered Mid‐Infrared Sulfur‐Impurity and Free‐Carrier Absorption

Nastulyavichus

Сараева

Rudenko

et al. 2020

Part & Part Syst Charact

View full text Add to dashboard Cite

rather limited dangling-bond absorption of electromagnetic waves in amorphous nanosilicon, broadly variable free-carrier absorption (free-carrier concentration ≈10 17 cm −3 ) [4] in controllably doped silicon has recently brought another important modality to Si NPs, related to space-selective in situ anti-cancer hyperthermiabased therapies via near-and mid-infrared (IR) laser, or radiofrequency (RF) Joule heating. [4,6] However, to date strong Si-NP doping was realized only via minor introduction of gold, [7] since Si is rather immiscible material. [8] In contrast, n-hyperdoped Si was actively studied for the last decade as a material platform, supporting fabrication of mid-IR sensitizers for solar cells, [9] broadband active media for thin-film photovoltaics, [1] broad-band mid-IR nightvision and imaging devices for novel promising and emerging applications. The currently achieved strong (≈10 3 -10 4 cm −1 ) smooth [10][11][12][13][14] or band-engineered [15,16] mid-IR absorption in sulfur-(or selenium and tellurium [12] ) doped Si was suggested for raising solar-cell efficiency up to 49% through efficient harvesting of near-and mid-IR solar radiation. [17] Besides the donor-based band-to-band absorption, considerable free-carrier absorption via thermal ionization of shallow donor states was also reported in such Si nanoparticles (NPs), which are innovative promising light-harvesting components of thin-film solar cells and key-enabling biocompatible theranostic elements of infrared-laser and radiofrequency hyperthermia-based therapies of cancer cells in tumors and metastases, are significantly advanced in their near/mid-infrared band-to-band and free-carrier absorption via donor sulfur-hyperdoping during high-throughput facile femtosecond-laser ablative production in liquid carbon disulfide. High-resolution transmission electron microscopy and Raman microscopy reveal their mixed nanocrystalline/ amorphous structure, enabling the extraordinary sulfur content of a few atomic percents and very minor surface oxidation/carbonization characterized by energy-dispersive X-ray spectro scopy and X-ray photoelectron spectroscopy. A 200-nm thick layer of the nanoparticles exhibits near−mid-infrared absorbance, comparable to that of the initial 380-micron thick n-doped Si wafer (phosphordopant concentration ≈10 15 cm −3 ), with the corresponding extinction coefficient for the hyperdoped NPs being 4-7 orders higher over the broadband spectral range of 1-25 micrometers. Such ultimate, but potentially tunable mid-IR structured, multi-band absorption of various sulfur-impurity clusters and smooth free-carrier absorption are break through advances in mid-infrared (mid-IR) laser and radiofrequency (RF) hyperthermia-based therapies, as envisioned in the RF-heating tests, and in fabrication of higher-efficiency thin-film and bulk photovoltaic devices with ultra-broad (UV−mid-IR) spectral response.

show abstract

Influence of metal doping on optical properties of Si nanoparticles

Cited by 14 publications

References 20 publications

Nano-Antennas Based on Silicon-Gold Nanostructures

Nano-Antennas Based on Silicon-Gold Nanostructures

Optical spectroscopy of single Si nanocylinders with magnetic and electric resonances

Multifunctional Sulfur‐Hyperdoped Silicon Nanoparticles with Engineered Mid‐Infrared Sulfur‐Impurity and Free‐Carrier Absorption

Contact Info

Product

Resources

About