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Non-Hermitian chiral degeneracy of gated graphene metasurfaces
Soojeong Baek, Sang Hyun Park, Donghak Oh +9
Non-Hermitian degeneracies, also known as exceptional points (EPs), have been the focus of much attention due to their singular eigenvalue surface structure. Nevertheless, as perta…
Raman lasing and Fano lineshapes in a packaged fiber-coupled whispering-gallerymode microresonator
Guangming Zhao, Şahin Kaya Özdemir, Tao Wang +3
We report Raman lasing and the optical analog of electromagnetically-induced-transparency (EIT) in a whispering-gallerymode (WGM) microtoroid resonator embedded in a low refractive…
Controllable optical response by modifying the gain and loss of a mechanical resonator and cavity mode in an optomechanical system
Yu-Long Liu, Rebing Wu, Jing Zhang +4
We theoretically study a strongly-driven optomechanical system which consists of a passive optical cavity and an active mechanical resonator. When the optomechanical coupling stren…
Observation of optomechanical coupling in a microbottle resonator
Motoki Asano, Yuki Takeuchi, Weijian Chen +5
In this work, we report optomechanical coupling, resolved sidebands and phonon lasing in a solid-core microbottle resonator fabricated on a single mode optical fiber. Mechanical mo…
Loss-induced suppression and revival of lasing
B. Peng, S. K. Ozdemir, S. Rotter +6
Controlling and reversing the effects of loss are major challenges in optical systems. For lasers losses need to be overcome by a sufficient amount of gain to reach the lasing thre…
What is- and what is not- Electromagnetically-Induced-Transparency in Whispering-Gallery-Microcavities
Bo Peng, Sahin Kaya Ozdemir, Weijian Chen +2
Electromagnetically-induced-transparency (EIT) and Autler-Townes splitting (ATS) are two prominent examples of coherent interactions between optical fields and multilevel atoms. Th…