Journal
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
Volume 68, Issue 3, Pages 854-858Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TUFFC.2020.3010269
Keywords
Surface acoustic waves; Optical variables control; Light emitting diodes; Gallium nitride; Harmonic analysis; GaN; interdigital transducers (IDTs); light emitting diodes (LEDs); surface acoustic waves (SAWs)
Categories
Funding
- Ministry of Science and Technology of Taiwan [MOST 108-2221-E-002-014-MY3]
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Researchers have developed a radio frequency-modulated light emitter driven by the coupling between electrical and acoustic signals at room temperature, which exhibits a 990MHz oscillation behavior that cannot be solely achieved by electrical driving. This phenomenon is attributed to the excitation by the harmonics of surface acoustic waves in the light emitter.
Optomechanical properties have been widely explored on the interactions between phonon, photon, and electrons. The applications range from acoustic filters for mobile handsets to quantum information science./However, up to date, the interaction between harmonic modes of surface acoustic waves (SAWs) and photons has not been studied in detail. Here, we develop radio frequency (RF) - modulated light emitters driven by the coupling between electrical and acoustic signals at room temperature. The light emitter demonstrates a 990-MHz oscillation behavior which cannot be solely achieved by electrical driving due to resistance-capacitance (RC) limit. Instead, the result is attributed to the excitation by the harmonics of SAWs in the light emitter. The similar to gigahertz light oscillation enables a new architecture for information processing. In this work, we also demonstrate the coupling between acoustooptical and electrooptical interactions by simultaneously applying 990-MHz acoustic signals and 20-MHz modulated electrical inputs.
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