TY - GEN
T1 - Permanent Tailoring of BIC Resonances Using Temperature
AU - Kuppadakkath, Athira
AU - Barreda, Angela
AU - Ghazaryan, Lilit
AU - Bucher, Tobias
AU - Koshelev, Kiril
AU - Kivshar, Yuri
AU - Pertsch, Thomas
AU - Choi, Duk
AU - Staude, Isabelle
AU - Eilenberger, Falk
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Dielectric metasurfaces have applications in wavefront shaping, sensing, and imaging. We show that the quasi bound states in the continuum (BIC) resonance in the hydrogenated amorphous silicon (a.Si:H) metasurface structure can be permanently fine tuned by gradual and short-term heating. The increase of refractive index of a.Si:H with the temperature resulted in the redshift of resonance. Here we quantitatively analyze the modifications in the resonance wavelength and the Q-factor due to gradual heating. The q-BIC could be tuned over a wavelength of 50 nm by gradual heating while maintaining high Q-factors. The effect of temperature on two types of metasurface structures designed to have resonances at 683 nm (visible) and 825 nm (NIR) is demonstrated in the following figure. The visible metasurface had a considerable reduction in the Q-factor above 350 ◦ C whereas the NIR metasurface could retain a high Q-factor till 550 ◦ C.
AB - Dielectric metasurfaces have applications in wavefront shaping, sensing, and imaging. We show that the quasi bound states in the continuum (BIC) resonance in the hydrogenated amorphous silicon (a.Si:H) metasurface structure can be permanently fine tuned by gradual and short-term heating. The increase of refractive index of a.Si:H with the temperature resulted in the redshift of resonance. Here we quantitatively analyze the modifications in the resonance wavelength and the Q-factor due to gradual heating. The q-BIC could be tuned over a wavelength of 50 nm by gradual heating while maintaining high Q-factors. The effect of temperature on two types of metasurface structures designed to have resonances at 683 nm (visible) and 825 nm (NIR) is demonstrated in the following figure. The visible metasurface had a considerable reduction in the Q-factor above 350 ◦ C whereas the NIR metasurface could retain a high Q-factor till 550 ◦ C.
UR - http://www.scopus.com/inward/record.url?scp=85175720567&partnerID=8YFLogxK
U2 - 10.1109/CLEO/EUROPE-EQEC57999.2023.10231769
DO - 10.1109/CLEO/EUROPE-EQEC57999.2023.10231769
M3 - Conference contribution
T3 - 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
BT - 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Y2 - 26 June 2023 through 30 June 2023
ER -