Share Email Print
cover

Proceedings Paper

Evaluation of outputted and leaked power for a micro-cavity laser in the terahertz region
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Terahertz wave is generally an electromagnetic wave at the wavelength of 0.1-10 THz (30-3000 μm). The terahertz laser is a new type of radiation source with many unique advantages and has broad applications. Generally, the size of a normal laser cavity is from a few of to several hundred millimeters, and the size of a micro-cavity is mainly from a few of to several hundred micrometers in the wavelength region of ultraviolet, visible, and near-infrared. However, if the wavelength increases to the terahertz region, the wavelength is of the order of the micro-cavity size. The power distributions inside and outside the cavity of a terahertz laser are significantly different from those for a conventional laser cavity. In this paper, a theoretical model is established to study the outputted and leaked power of a micro-cavity in the terahertz band. We assume that the wavelength of an emission terahertz source is 240 μm and simulate the output features of a micro-cavity laser with the Finite-Difference Time-Domain (FDTD) algorithm. The output characteristics of a micro-cavity have been analyzed by using two types of material and different thicknesses of the sidewall. It has been found that when the thicknesses of both silver and aluminum sidewalls are reduced to around 16 μm, the power leaking from the micro-cavity begins to increase with the decrease of the sidewall thickness. In this way, the sidewall no longer restrains terahertz radiation inside the cavity. The simulation results might be referred for the design of a terahertz laser with the micro-cavity.

Paper Details

Date Published: 12 March 2020
PDF: 8 pages
Proc. SPIE 11441, 2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 114410A (12 March 2020); doi: 10.1117/12.2543454
Show Author Affiliations
Haoyu Li, Southwest Institute of Technical Physics (China)
Kepeng Rong, Southwest Institute of Technical Physics (China)
Qing Luo, Southwest Institute of Technical Physics (China)
Jiao Yang, Southwest Institute of Technical Physics (China)
Lijuan Tan, Southwest Institute of Technical Physics (China)
He Cai, Southwest Institute of Technical Physics (China)
Xiaoxu Liu, Southwest Institute of Technical Physics (China)
Goufei An, Southwest Institute of Technical Physics (China)
Haizhi Song, Southwest Institute of Technical Physics (China)
You Wang, Southwest Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 11441:
2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications
Cunlin Zhang; Xi-Cheng Zhang; Zhiming Huang, Editor(s)

© SPIE. Terms of Use
Back to Top
PREMIUM CONTENT
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?
close_icon_gray