We report a high-intensity nano-aperture vertical-cavity surface-emitting laser (VCSEL) utilizing a bowtie-shaped aperture. A maximum power of 188 μW is achieved from a 180 nm bowtie aperture at a wavelength of 970 nm. The near-field full width at half-maximum intensity spot size 20 nm away from the bowtie aperture is 64 nm×66 nm from simulation, and the peak near-field intensity is estimated to be as high as 47 mW/μm2. This intensity is high enough to realize near-field optical recording, and the small spot size corresponds to storage densities up to 150 Gbits/in2. The bowtie-aperture VCSEL also enables other applications, such as compact high-intensity probes for ultrahigh-resolution near-field imaging and single molecule fluorescence and spectroscopy.
© 2007 Optical Society of America
Original Manuscript: March 19, 2007
Revised Manuscript: May 15, 2007
Manuscript Accepted: May 16, 2007
Published: July 3, 2007
Vol. 2, Iss. 8 Virtual Journal for Biomedical Optics
Zhilong Rao, Lambertus Hesselink, and James S. Harris, "High-intensity bowtie-shaped nano-aperture vertical-cavity surface-emitting laser for near-field optics," Opt. Lett. 32, 1995-1997 (2007)