Dressed controlled filter with phase transitions of Eu³⁺: YPO₄ and Pr³⁺: YPO₄

¹ Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi'an Jiaotong University - Xi'an, 710049, China
² School of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology - Xi'an, 710021, China

^(a) habibdawar987@yahoo.com
^(b) ypzhang@mail.xjtu.edu.cn (corresponding author)

Received: 4 November 2019
Accepted: 8 April 2020

Abstract

We report the spectral and temporal nature of different phases of europium-doped YPO (Eu³⁺: YPO₄) and praseodymium-doped YPO (Pr³⁺: YPO₄) crystals. We investigate the change in the dressing effect by shifting the energy levels causing change in line-shape and resolution of the output spectral signal when we employ the hexagonal (H), tetragonal (T), and mixed phase of H and T with different proportions. Further, we propose a tunable spectral filter (narrow bandpass notch filter and bandstop filter) by controlling the dressed phases of Eu³⁺: YPO₄. The high-resolution dressing peak suggests the realization of the tunable spectral filter with bandwidth contrast of about 93%.