Experimental Investigation of an L-Shaped Very-Small-Aperture Laser
XU Ji-Ying1, WANG Jia1, GAI Hong-Feng1, TIAN Qian1, WANG Bo-Xiong1, HAO Zhi-Biao2, HAN Shuo2
1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084
2State Key Laboratory on Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084
Experimental Investigation of an L-Shaped Very-Small-Aperture Laser
1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084
2State Key Laboratory on Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084
Abstract： An L-shaped very-small-aperture laser (VSAL) with high power output and field enhancement effect is fabricated and characterized. As a comparison, a conventional rectangular VSAL and a double-aperture VSAL containing one L-aperture and one rectangular aperture are also fabricated and measured. The confined optical fields in the vicinity of apertures of VSAL are detected using an apertured near-field scanning optical microscope. The experimental results reveal that the power output from the L-shaped VSAL increases about 13 times than the rectangular VSAL with a comparable aperture area. It is indicated that the L-shaped VSAL has strong power output enhancement effect. The near-field distribution of the double-aperture VSAL indicates that the L-aperture has the field confinement and enhancement effect stronger than the rectangular aperture.
2006, Vol. 23 
