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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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Two Photon-Pumped Whispering-Gallery Mode Lasing and Dynamic Regulation.
Junfeng Lu1,2, Fangtao Li1, Wenda Ma1,2
1CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 P. R. China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 26, 2019
Summary
Researchers demonstrated dynamic control of UV lasing in a ZnO microresonator using two-photon absorption. This breakthrough enables tunable frequency upconversion lasers with a low threshold and high quality factor.
Area of Science:
- Optics and Photonics
- Materials Science
- Quantum Electronics
Background:
- Dynamic regulation of nonlinear optical signals is crucial for advanced optoelectronic devices.
- Whispering-gallery mode (WGM) resonators offer high quality factors for efficient light-matter interaction.
Purpose of the Study:
- To demonstrate two-photon absorption-induced WGM lasing in a single ZnO microresonator.
- To achieve dynamic regulation of the lasing mode in the UV spectral region.
- To explore applications in tunable frequency upconversion lasers.
Main Methods:
- Fabrication and characterization of a single ZnO microresonator.
- Excitation using two-photon absorption (TPA) under ambient conditions.
- Analysis of lasing threshold, quality factor (Q), and resonant wavelength tuning.
Main Results:
- Achieved TPA-induced WGM lasing with a low threshold (15 µW) and high Q (≈ 3200).
- Successfully demonstrated dynamic tuning of resonant wavelengths for TE33 and TE32 modes from 388.99/391.12 nm to 390.01/392.12 nm.
- Confirmed lasing in the UV gain region.
Conclusions:
- This work presents a novel strategy for developing high-performance, mode-adjustable frequency upconversion lasers.
- The demonstrated dynamic control of TPA-pumped lasing in ZnO microresonators opens new avenues for nonlinear optoelectronic devices.
- The findings have significant implications for laser technology, spectroscopy, and material analysis.
