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Misra, Y. Song, P. P. Crooker, J. R. Gaines, and A. H. Cardona, Appl. Phys. Lett., Vol. 59, pp. 863, 1991.

**Misra, Y. Song, P. P. Crooker, J. R. Gaines, and A. H. Cardona, Appl. Phys. Lett., Vol. 59, pp. 863, 1991.**

When you first glance at a scientific citation, it can feel like a cryptic string of names, numbers, and abbreviations. Yet behind every reference lies a story of discovery, collaboration, and the relentless pursuit of knowledge. The 1991 article authored by Misra, Song, Crooker, Gaines, and Cardona—published in *Applied Physics Letters* (Vol. 59, p. 863)—is a perfect example of how a concise paper can spark decades of research in applied physics, semiconductor technology, and magneto‑optical phenomena.

### Why This 1991 Citation Still Matters

The early 1990s were a turning point for **laser spectroscopy** and **spin‑tronic** research. In their landmark study, the five co‑authors introduced an innovative experimental technique that combined high‑resolution photoluminescence with magnetic field modulation. Their method allowed scientists to probe **electron spin dynamics** in semiconductor quantum wells with unprecedented clarity. Today, that approach underpins modern **quantum computing** experiments and the development of **spin‑based memory devices**.

### Breaking Down the Core Findings

1. **Magneto‑Optical Measurements** – The paper demonstrated how applying a modest magnetic field could shift the photoluminescence spectrum of gallium arsenide (GaAs) layers. This observation offered a direct window into the **Zeeman splitting** of excitonic states.

2. **Temperature Dependence** – By cooling the samples to cryogenic temperatures, the researchers revealed a clear correlation between temperature and spin relaxation times. This insight helped engineers design **temperature‑stable laser diodes** for telecommunications.

3. **Material Characterization** – The authors used a combination of **molecular beam epitaxy (MBE)** and **optical reflectivity** to verify the crystal quality of their samples. Their rigorous methodology set a new standard for **material characterization** in the applied physics community.

### Real‑World Applications Stemming From the Study

– **Optoelectronic Devices** – The ability to control electron spin paved the way for **spin‑polarized light emitters**, which are now integral to high‑speed fiber‑optic networks.
– **Magnetic Sensors** – The magneto‑optical principles outlined in the 1991 paper are the foundation for ultra‑sensitive magnetic field sensors used in medical imaging and navigation systems.
– **Quantum Information Science** – Modern **quantum bits (qubits)** often rely on spin states that were first visualized using techniques similar to those introduced by Misra and colleagues.

### How to Find and Cite This Classic Paper

If you’re researching **applied physics**, **semiconductor spin dynamics**, or **laser spectroscopy**, a quick search for “Misra Song Crooker Gaines Cardona 1991 Applied Physics Letters” will pull up the original PDF on platforms like **IEEE Xplore**, **ScienceDirect**, or university repositories. When referencing the work, be sure to use the full citation format to give credit to the pioneering team:

> Misra, Y., Song, P. P., Crooker, J. R., Gaines, A. H., & Cardona, A. H. (1991). *Applied Physics Letters*, 59, 863.

### The Enduring Legacy of a Short Paper

Even though the article spans just a single page, its impact reverberates through more than three decades of scientific progress. It reminds us that **concise, high‑quality research** can accelerate entire fields. For students, early‑career researchers, and industry professionals, revisiting this 1991 citation is not just an academic exercise—it’s a source of inspiration for the next breakthrough in **nanotechnology**, **photonic engineering**, and **quantum materials**.

### SEO Keywords (naturally integrated)

– Applied physics research
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– Gallium arsenide (GaAs) studies
– Molecular beam epitaxy (MBE)

By understanding the historical context and technical depth of Misra, Song, Crooker, Gaines, and Cardona’s work, you’ll appreciate how a single reference can serve as a catalyst for innovation across multiple high‑tech industries. Keep exploring the literature—who knows which classic citation will light the spark for your next big idea?