Emission cells with quantum dots on silicon chip prepared by using fs pulsed laser

IF 1.4 4区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Solid-state Electronics Pub Date : 2024-10-04 DOI:10.1016/j.sse.2024.109009

Wei-Qi Huang , Yin-lian Li , Zhong-Mei Huang , Hao-Ze Wang , Xi Zhang , Qi-Bin Liu , Shi-Rong Liu

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Abstract

Emission efficiency of bulk-silicon is very low due to its indirect-gap of energy band. However, it is interesting that the enhanced emission has been observed in the micro-cavities array fabricated by using femtosecond (fs) pulsed laser, in which the stimulated emission characteristics occur after annealing for suitable time in the photo-luminescence (PL) measurement at room temperature. The results of experiment and calculation demonstrated that the enhanced emission may be originated from the Si quantum dots embedded in the micro-cavities prepared by fs pulsed laser. Here, the direct-gap of energy band appears after annealing due to the Heisenberg principle related to ⊿k–1/⊿x in quantum system of nanostructures. The PL intensity obviously increases on the Si quantum dots growing with annealing for better crystallization, in which the external quantum efficiency is higher than 40 % near 760 nm. A new kind of emission source of the micro-cavities array in visible wavelength has been built on silicon wafer, in which the Si quantum dots play a main role for enhancement of emission. It should have a good application in optical integrated chip based on silicon, such as emission cells built on Si chip.

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利用 fs 脉冲激光在硅芯片上制备量子点发射电池

由于能带的间接间隙，硅块的发射效率非常低。然而，有趣的是，在使用飞秒（fs）脉冲激光制造的微腔阵列中观察到了增强的发射，在室温下进行光致发光（PL）测量时，退火适当时间后会出现受激发射特性。实验和计算的结果表明，增强的发射可能源于fs脉冲激光制备的微腔中嵌入的硅量子点。在这里，由于纳米结构量子体系中与⊿k-1/⊿x相关的海森堡原理，能带的直接隙在退火后出现。在退火后生长的硅量子点上，PL 强度明显增加，结晶效果更好，其中 760 纳米附近的外部量子效率高于 40%。在硅晶片上构建了一种新型可见光波长微腔阵列发射源，其中硅量子点在增强发射方面发挥了主要作用。它可以很好地应用于基于硅的光学集成芯片，如在硅芯片上构建的发射电池。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solid-state Electronics 物理-工程：电子与电气

CiteScore

3.00

自引率

5.90%

发文量

212

审稿时长

3 months

期刊介绍： It is the aim of this journal to bring together in one publication outstanding papers reporting new and original work in the following areas: (1) applications of solid-state physics and technology to electronics and optoelectronics, including theory and device design; (2) optical, electrical, morphological characterization techniques and parameter extraction of devices; (3) fabrication of semiconductor devices, and also device-related materials growth, measurement and evaluation; (4) the physics and modeling of submicron and nanoscale microelectronic and optoelectronic devices, including processing, measurement, and performance evaluation; (5) applications of numerical methods to the modeling and simulation of solid-state devices and processes; and (6) nanoscale electronic and optoelectronic devices, photovoltaics, sensors, and MEMS based on semiconductor and alternative electronic materials; (7) synthesis and electrooptical properties of materials for novel devices.