Near-IR subwavelength microdisk lasers

Song, Q.; Cao, H.; Ho, S. T.; Solomon, G. S.
February 2009
Applied Physics Letters;2/9/2009, Vol. 94 Issue 6, pN.PAG
Academic Journal
We report single-mode lasing in subwavelength GaAs disks under optical pumping. The disks are fabricated by standard photolithography and two steps of wet chemical etching. The simple fabrication method can produce submicron disks with good circularity, smooth boundary, and vertical sidewalls. The smallest lasing disks have a diameter of 627 nm and thickness of 265 nm. The ratio of the disk diameter to the vacuum lasing wavelength is about 0.7. Our numerical simulations confirm that the lasing modes are whispering-gallery modes with the azimuthal number as small as 4 and a modal volume of 0.97(λ/n)3.


Related Articles

  • Silicon junctionless field effect transistors as room temperature terahertz detectors. Marczewski, J.; Knap, W.; Tomaszewski, D.; Zaborowski, M.; Zagrajek, P. // Journal of Applied Physics;2015, Vol. 118 Issue 10, p104502-1 

    Terahertz (THz) radiation detection by junctionless metal-oxide-semiconductor field-effect transistors (JL MOSFETs) was studied and compared with THz detection using conventional MOSFETs. It has been shown that in contrast to the behavior of standard transistors, the junctionless devices have a...

  • Noncontact and nondestructive identification of neural circuits with a femtosecond laser. Xiuli Liu; Xiaohua Lv; Shaoqun Zeng; Wei Zhou; Qingming Luo // Applied Physics Letters;2/9/2009, Vol. 94 Issue 6, pN.PAG 

    Identifying neuronal connections is regarded as essential in understanding the structure and functions of neural circuits. However, the issue is difficult to resolve. Due to its ultrahigh peak power, the femtosecond laser was used to stimulate neuron circuits in this study. Our results showed...

  • Spectral and spatial single mode emission from a photonic crystal distributed feedback laser. Hofmann, H.; Scherer, H.; Deubert, S.; Kamp, M.; Forchel, A. // Applied Physics Letters;3/19/2007, Vol. 90 Issue 12, p121135 

    The authors report on the fabrication and characterization of photonic crystal distributed feedback lasers, which are a generalization of distributed feedback and angled distributed feedback lasers. Spectral and spatial mode selection is provided by a two-dimensional, rectangular lattice of...

  • Submicron, vacuum ultraviolet contact lithography with an F2 excimer laser. White, J. C.; Craighead, H. G.; Howard, R. E.; Jackel, L. D.; Behringer, R. E.; Epworth, R. W.; Henderson, D.; Sweeney, J. E. // Applied Physics Letters;1984, Vol. 44 Issue 1, p22 

    An F2 excimer laser at 157 nm has been used for the first time as an exposure source for high resolution photolithography. At this short wavelength, conventional glass and quartz mask substrates are opaque, and therefore alkaline-earth halides and sapphire were used as mask substrates. The masks...

  • Optogenetic manipulation of neural activity in freely moving Caenorhabditis elegans. Leifer, Andrew M.; Fang-Yen, Christopher; Gershow, Marc; Alkema, Mark J.; Samuel, Aravinthan D. T. // Nature Methods;Feb2011, Vol. 8 Issue 2, p147 

    We present an optogenetic illumination system capable of real-time light delivery with high spatial resolution to specified targets in freely moving Caenorhabditis elegans. A tracking microscope records the motion of an unrestrained worm expressing channelrhodopsin-2 or halorhodopsin in specific...

  • Submicrometer resonant tunnelling diodes fabricated by photolithography and selective wet etching. Wang, J.; Beton, P.H. // Applied Physics Letters;8/29/1994, Vol. 65 Issue 9, p1124 

    Details the fabrication of small area resonant tunnelling diodes using a process based on photolithography and selective wet etching. Exhibition of additional peaks by low-temperature current-voltage characteristics of diodes; Observation of pronounced asymmetry in current-voltage; Degree of...

  • Distributed feedback GaSb based laser diodes with buried grating. Gaimard, Q.; Cerutti, L.; Teissier, R.; Vicet, A. // Applied Physics Letters;4/21/2014, Vol. 104 Issue 16, p1 

    We report on the growth, fabrication, and experimental study of distributed feed-back antimonide diode lasers with buried grating. A second order index-coupled grating was defined by interferometric lithography on the top of the laser waveguide and dry etched by reactive ion etching. The grating...

  • Loop formation and self-fasciculation of cortical axon using photonic guidance at long working distance. Mondal, Argha; Black, Bryan; Young-tae Kim; Mohanty, Samarendra // Scientific Reports;11/7/2014, p1 

    The accuracy of axonal pathfinding and the formation of functional neural circuitry are crucial for an organism to process, store, and retrieve information from internal networks as well as from the environment. Aberrations in axonal migration is believed to lead to loop formation and...

  • Modeling and compensation of the thermal error on feed drive system of CNC grinding machine. Peng, W. C.; Wang, S. J.; Xia, H. J. // Key Engineering Materials;2016, Vol. 679, p19 

    Thermal errors cause serious dimensional errors to a workpiece in precision machining. A feed drive system generates more heat through friction at contact areas, such as the Linear encoder and the guide, thereby causing thermal expansion which affects machining accuracy. Therefore, the thermal...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics