Silent white light: Reduction of the second-order intensity correlation coefficient

Author:

Hansmann Kai Niklas1ORCID,Dommermuth Franziska1,Elsäßer Wolfgang123ORCID,Walser Reinhold1ORCID

Affiliation:

1. Technical University of Darmstadt

2. Trinity College Dublin

3. Istituto di Elettronica e di Ingegneria dell'Informazione e delle Telecomunicazioni (IEIIT) del Consiglio Nazionale delle Richerche (CNR)

Abstract

We investigate the intrawaveguide statistics manipulation of broadband light by combining semiconductor quantum dot physics with quantum optics. By cooling a quantum dot superluminescent diode to the liquid nitrogen temperature of 77 K, Blazek [] have demonstrated a temperature-dependent reduction of the second-order intensity correlation coefficient from 2 for thermal amplified spontaneous emission light to g(2)(0,T=190K)1.33. Here, we model the broadband photon statistics assuming amplified spontaneous emission radiation in a pumped, saturable quantum dot gain medium. We demonstrate that, by an intensity increase due to the quantum dot occupation dynamics via the temperature-tuned quasi-Fermi levels, together with the saturation nonlinearity, a statistics manipulation from thermal Bose-Einstein statistics towards Poissonian statistics can be realized, thus producing “silent white light” with a reduced second-order correlation coefficient. Such intensity-noise-reduced broadband radiation is relevant for many applications such as optical coherence tomography, optical communication, or optical tweezers. Published by the American Physical Society 2024

Funder

Deutsches Zentrum für Luft- und Raumfahrt

Bundesministerium für Wirtschaft und Energie

Publisher

American Physical Society (APS)

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