室温下 (110) InGaAs/AlGaAs 量子阱中的纳秒级重组寿命和自旋弛豫时间

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2024-03-06 DOI:10.35848/1882-0786/ad2907

Satoshi Iba and Yuzo Ohno

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引用次数: 0

摘要

具有（110）取向的 InGaAs/AlGaAs 量子阱作为具有圆偏振发射的自旋控制激光器的有源层具有吸引力，而自旋弛豫时间预计比（100）取向层更长。然而，迄今为止所报道的 (110) InGaAs/AlGaAs 结构的重组寿命（40 ps）和自旋弛豫时间（440 ps）是不够的。这里的研究表明，与以前通过分子束外延方法生长晶体时使用的温度和 V/III 束等效压力比相比，更高的生长温度和 V/III 束等效压力比可以使晶体在 RT 时的重组和自旋弛豫时间达到纳秒级，从而满足自旋激光器的应用要求。

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Nanosecond recombination lifetimes and spin relaxation times in (110) InGaAs/AlGaAs quantum wells at room temperature

Quantum wells in InGaAs/AlGaAs with (110) orientation are attractive as active layers in spin-controlled lasers with circularly polarized emission, while the spin relaxation time is expected to be larger than for (100)-oriented layers. However, the hitherto reported recombination lifetimes (40 ps) and spin relaxation times (440 ps) of (110) InGaAs/AlGaAs structures are insufficient. Here it is shown that higher growth temperatures and higher V/III beam equivalent pressure ratios than previously used in crystal growth by molecular beam epitaxy lead to recombination and spin relaxation times in the nanosecond range at RT, meeting the requirements for application in spin lasers.

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).