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ABSTRACT
Antisymmetric multi cavity resonator useful for flat top transmission is reported which is simple and compact than the similar conventional structures. The study of the output spectra is carried out in terms of layer thickness and change in angle of incidence. Electro-optic property of the EO polymer is utilized to convert flat-top output with full width half maximum (FWHM) bandwidth of 10 nm into narrowband output of 0.64 nm (FWHM bandwidth) by applying a maximum voltage of 500 V across the structure. It was shown here that by controlling the low index layer widths, angle of incidence of the light and applying a voltage of 300 V results in a flattop spectrum of FWHM bandwidth of 2.5 nm with tuning sensitivity 0.033 nm/V. The tuning sensitivity and bandwidth of the reported hybrid filter can also be customized comparatively at lower applied voltage than the previously reported electro-optically tunable filters.
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Notes on contributors
Rajorshi Bandyopadhyay
Rajorshi Bandyopadhyay received his M.Tech degree in optics and optoelectronics from the Department of Applied Optics and Photonics of University of Calcutta, India, in 2012. He is currently working for his PhD from the same department. His research interests include computational electromagnetics and the design of devices for nanophotonics applications.
Rajib Chakraborty
Rajib Chakraborty is a Professor of the Department of Applied Optics and Photonics, University of Calcutta, India. His research interest is in integrated optics, photonic sensors, and nanophotonics. He is a member of the Research Advisory Committee of Centre for Research in Nanoscience and Nanotechology, University of Calcutta. Professionally, he is affiliated with the Optical Society of India as its fellow and treasurer, and is also a member of OSA and SPIE.