2016/02/08 by Yue Sun, Sun, Yue, Thomas P. White +6
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #Phase-change materials and chalcogenides #Photonic Crystals and Applications #Photonic and Optical Devices #physics.optics
paper · pdf · doi:10.48550/arxiv.1602.02807
4 figures and 1 table
arxiv created 2016/02/08 · openalex publication_date 2016/02/08 · arxiv updated 2016/02/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a theoretical and experimental analysis of nonlinear thermo-optic effects in suspended chalcogenide glass nanobeam cavities. We measure the power dependent resonance peaks and characterise the dynamic nonlinear thermo-optic response of the cavity under modulated light input. Several distinct nonlinear characteristics are identified, including a modified spectral response containing periodic fringes, a critical wavelength jump and saturated time delay for modulation frequency faster than the thermal characteristic time. We reveal that the coupling to a parasitic Fabry-Perot cavity enables isolated thermal equilibrium states resulting in the discontinuous thermo-optic critical point.