Broadband superluminescent diodes and semiconductor optical amplifiers for the spectral range 750 — 800 nm

Il'chenko, S. N.; Kostin, Yu. O.; Kukushkin, I A; Ладугин, М. А.; Lapin, P. I.; Lobintsov, A. A.; Маrmalyuk, А. А.; Yakubovich, S D

doi:10.1070/qe2011v041n08abeh014652

Cited by 6 publications

(1 citation statement)

References 6 publications

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“…The uniform intensity distribution can be achieved either using broadband near-infrared emitters, like superluminescent and broadband laser diodes [43–46] in stand-alone or array configuration, or spectrally shaping supercontinuum laser sources [47]. The boundary wavelengths λ 1 and λ 2 are usually determined by the transparency window of biological tissue or the pass-band of optical filters.…”

Section: Effect Of Number Density On Optimal Design Of Gold Nanoshmentioning

confidence: 99%

Effect of number density on optimal design of gold nanoshells for plasmonic photothermal therapy

Sikdar

Rukhlenko

Cheng

et al. 2012

Biomed. Opt. Express

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Despite much research efforts being devoted to the design optimization of metallic nanoshells, no account is taken of the fact that the number of the nanoshells that can be delivered to a given cancerous site vary with their size. In this paper, we study the effect of the nanoshell number density on the absorption and scattering properties of a gold-nanoshell ensemble exposed to a broadband near-infrared radiation, and optimize the nanoshells’ dimensions for efficient cancer treatment by analyzing a wide range of human tissues. We first consider the general situation in which the number of the delivered nanoshells decreases with their mean radius R as ∝ R−β, and demonstrate that the optimal design of nanoshells required to treat cancer most efficiently depends critically on β. In the case of β = 2, the maximal energy absorbed (scattered) by the ensemble is achieved for the same dimensions that maximize the absorption (scattering) efficiency of a single nanoshell. We thoroughly study this special case by the example of gold nanoshells with silica core. To ensure that minimal thermal injury is caused to the healthy tissue surrounding a cancerous site, we estimate the optimal dimensions that minimize scattering by the nanoshells for a desired value of the absorption efficiency. The comparison of gold nanoshells with different cores shows that hollow nanoshells exhibiting relatively low absorption efficiency are less harmful to the healthy tissue and, hence, are preferred over the strongly absorbing nanoshells. For each of the cases analyzed, we provide approximate analytical expressions for the optimal nanoshell dimensions, which may be used as design guidelines by experimentalists, in order to optimize the synthesis of gold nanoshells for treating different types of human cancer at their various growth stages.

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Section: Effect Of Number Density On Optimal Design Of Gold Nanoshmentioning

confidence: 99%

Effect of number density on optimal design of gold nanoshells for plasmonic photothermal therapy

Sikdar

Rukhlenko

Cheng

et al. 2012

Biomed. Opt. Express

View full text Add to dashboard Cite

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Broadband semiconductor optical amplifiers of the spectral range 750 – 1100 nm

Андреева¹,

Il'chenko²,

Ладугин³

et al. 2013

Quantum Electron.

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Superluminescent diodes of the 770 – 790-nm range based on semiconductor nanostructures with narrow quantum wells

Anikeev¹,

Bagaev²,

Il'chenko³

et al. 2019

Quantum Electron.

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Comparative experimental study of superluminescent diodes (SLDs) with active layers containing one, two, or three 5.0-nm-wide quantum wells symmetrically positioned in the waveguide layer is performed. It is shown that an increase in the number of quantum wells leads to narrowing of the superluminescence spectrum and weakens the dependence of its width on the pump level. Simultaneously, the degree of polarisation of the output radiation noticeably increases. For example, rather reliable high-power narrow-band SLDs with a spectral halfwidth smaller than 8 nm and polarisation ratio TE/TM exceeding 20 dB are developed.

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Broadband superluminescent diodes and semiconductor optical amplifiers for the spectral range 750 — 800 nm

Cited by 6 publications

References 6 publications

Effect of number density on optimal design of gold nanoshells for plasmonic photothermal therapy

Effect of number density on optimal design of gold nanoshells for plasmonic photothermal therapy

Broadband semiconductor optical amplifiers of the spectral range 750 – 1100 nm

Superluminescent diodes of the 770 – 790-nm range based on semiconductor nanostructures with narrow quantum wells

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