Strong coupling of emitters with surface plasmons in transmissive metal gratings for optically–pumped surface emitting lasers

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2024-12-27 DOI:10.1016/j.jlumin.2024.121050

Yuying Wang, Zhijun Sun

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引用次数: 0

Abstract

Transmissive metal gratings can be used to develop chip–on surface emitting lasers based on coupling of surface plasmon (SPs) and molecular, ionic or nanomaterial emitters integrated with electrically–driven pumping sources. In this paper, we report a numerical study on role of strong coupling between the emitters and SP resonance (SPR) mode at the metal grating in their interactions and lasing. In the study, a four–level two–electron model is used for the emitters in finite–difference time–domain simulations. It is shown that the strong coupling can be achieved by increasing density of the emitters in gain medium adjacent to the metal grating. And, in the strong coupling condition, lasing of the emitters is observed above a threshold pumping level, demonstrating much narrower emission bandwidth and abruptly increased emission intensity. While, in the weak coupling condition, there is only spontaneous emission; and stimulated emission cannot be induced even when population inversion is achieved at high pumping levels. The results indicate that strong coupling of the emitters with the SPR mode is critically important in realization of plasmonic lasing.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.