Lasing without cavity

Bruno Sfez; Zvi Kotler; S. Margel; B. Nitzan

doi:10.1117/12.281376

Lasing without cavity

Bruno Sfez
, Zvi Kotler
, S. Margel
, B. Nitzan

Department of Chemistry

Research output: Contribution to journal › Conference article › peer-review

Abstract

Optical gain media filled with strong scatterers present a laser-like emission when optically pumped.Different regimes can be evidenced where amplified spontaneous emission together with multiple scattering play the main role. A mapping technique where both the concentrations of dye molecules and scatterers are independently varied allows to differentiate between those regimes. A simple model based on photon diffusion is presented and threshold for lasing emission is derived, and is compared with the experiment. Qualitative agreement is found, showing that the threshold critically depends on the samples macroscopic size.

Original language	English
Pages (from-to)	287-295
Number of pages	9
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	3110
DOIs	https://doi.org/10.1117/12.281376
State	Published - 1997
Event	10th Meeting on Optical Engineering in Israel - Jerusalem, Israel Duration: 2 Mar 1997 → 2 Mar 1997

Keywords

Laser
Light localization
Photon diffusion
Random media
Scattering

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10.1117/12.281376

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title = "Lasing without cavity",

abstract = "Optical gain media filled with strong scatterers present a laser-like emission when optically pumped.Different regimes can be evidenced where amplified spontaneous emission together with multiple scattering play the main role. A mapping technique where both the concentrations of dye molecules and scatterers are independently varied allows to differentiate between those regimes. A simple model based on photon diffusion is presented and threshold for lasing emission is derived, and is compared with the experiment. Qualitative agreement is found, showing that the threshold critically depends on the samples macroscopic size.",

keywords = "Laser, Light localization, Photon diffusion, Random media, Scattering",

author = "Bruno Sfez and Zvi Kotler and S. Margel and B. Nitzan",

year = "1997",

doi = "10.1117/12.281376",

language = "אנגלית",

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journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "10th Meeting on Optical Engineering in Israel ; Conference date: 02-03-1997 Through 02-03-1997",

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AU - Sfez, Bruno

AU - Kotler, Zvi

AU - Margel, S.

AU - Nitzan, B.

PY - 1997

Y1 - 1997

N2 - Optical gain media filled with strong scatterers present a laser-like emission when optically pumped.Different regimes can be evidenced where amplified spontaneous emission together with multiple scattering play the main role. A mapping technique where both the concentrations of dye molecules and scatterers are independently varied allows to differentiate between those regimes. A simple model based on photon diffusion is presented and threshold for lasing emission is derived, and is compared with the experiment. Qualitative agreement is found, showing that the threshold critically depends on the samples macroscopic size.

AB - Optical gain media filled with strong scatterers present a laser-like emission when optically pumped.Different regimes can be evidenced where amplified spontaneous emission together with multiple scattering play the main role. A mapping technique where both the concentrations of dye molecules and scatterers are independently varied allows to differentiate between those regimes. A simple model based on photon diffusion is presented and threshold for lasing emission is derived, and is compared with the experiment. Qualitative agreement is found, showing that the threshold critically depends on the samples macroscopic size.

KW - Laser

KW - Light localization

KW - Photon diffusion

KW - Random media

KW - Scattering

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - 10th Meeting on Optical Engineering in Israel

Y2 - 2 March 1997 through 2 March 1997

ER -

Lasing without cavity

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Keywords

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