Encaved optical fiber nano-probe exciting whispering gallery mode resonance with focused far off-axis beam - Aix-Marseille Université Accéder directement au contenu
Article Dans Une Revue Optics Express Année : 2023

Encaved optical fiber nano-probe exciting whispering gallery mode resonance with focused far off-axis beam

Jasleen Kaur
  • Fonction : Auteur
Kaushal Vairagi
Rashmi Achla Minz
  • Fonction : Auteur
Stefan Enoch
Samir Mondal

Résumé

This paper demonstrates whispering gallery mode (WGM) resonance with the help of an encaved optical nano-probe developed inside an optical fiber tip cavity. The nano-probe generates a tightly focused beam with a spot-size of ∼3 µm. A barium titanate microsphere is placed besides the optical axis inside the cavity. The focused beam remains off-axis of the microresonator and excites the WGM. The off-axis excitation shows unique resonating properties depending on the location of the resonator. A resonant peak with quality factor as high as Q ∼7 × 10 4 is achieved experimentally. Another design with a shorter cavity length for a bigger resonator is also demonstrated by embedding a bigger microsphere on the cleaved fiber tip surface. The optical probe holds great potential for photonic devices and is ideal for studying morphology-based scattering problems.

Dates et versions

hal-04412762 , version 1 (23-01-2024)

Identifiants

Citer

Jasleen Kaur, Kaushal Vairagi, Rashmi Achla Minz, Stefan Enoch, Samir Mondal. Encaved optical fiber nano-probe exciting whispering gallery mode resonance with focused far off-axis beam. Optics Express, 2023, 31 (17), pp.27203. ⟨10.1364/OE.495702⟩. ⟨hal-04412762⟩
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