Exploring the Next Phase in Gallium Nitride Photonics

Bayram, Can; Liu, R.

doi:10.1016/bs.semsem.2016.07.001

Cited by 4 publications

(1 citation statement)

References 59 publications

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“…However, whereas the application of Si ORRs as electro-optical modulators is well studied [18], not many works can be found in literature employing microrings as efficient photonic thermal sensors. Furthermore, extending the study to materials such as GaN and diamond with excellent semiconducting and mechanical properties opens up opportunities to design composite opto-electronic and opto-mechanic devices, respectively [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Photonic and Thermal Modelling of Microrings in Silicon, Diamond and GaN for Temperature Sensing

et al. 2020

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Staying in control of delicate processes in the evermore emerging field of micro, nano and quantum-technologies requires suitable devices to measure temperature and temperature flows with high thermal and spatial resolution. In this work, we design optical microring resonators (ORRs) made of different materials (silicon, diamond and gallium nitride) and simulate their temperature behavior using several finite-element methods. We predict the resonance frequencies of the designed devices and their temperature-induced shift (16.8 pm K−1 for diamond, 68.2 pm K−1 for silicon and 30.4 pm K−1 for GaN). In addition, the influence of two-photon-absorption (TPA) and the associated self-heating on the accuracy of the temperature measurement is analysed. The results show that owing to the absence of intrinsic TPA-processes self-heating at resonance is less critical in diamond and GaN than in silicon, with the threshold intensity I th = α / β , α and β being the linear and quadratic absorption coefficients, respectively.

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