Whispering gallery-mode lasing in ZnO microrods at room temperature

Dai, J.; Xu, C. X.; Zheng, K.; Lv, C. G.; Cui, Y. P.
December 2009
Applied Physics Letters;12/14/2009, Vol. 95 Issue 24, p241110
Academic Journal
An individual hexagonal ZnO microrod was employed as a whispering-gallery mode (WGM) microcavity to obtain ultraviolet lasing at room temperature. The WGM lasing shows a low threshold, a high quality factor, and distinct mode structure. A typical stimulated emission from the ZnO microrod with diagonal of 6.67 μm exhibits a low lasing threshold of 255 kW/cm2. The observed discrete lasing modes match with the simulated positions very well. The spatial distribution of the lasing intensity demonstrates the lasing output direction and provides the direct evidence of the WGM resonant mechanism. We systematically investigated the lasing performance for different sized microrods.


Related Articles

  • Facility for Pulsed Extreme Ultraviolet Detector Calibration. Grantham, S.; Vest, R.; Tarrio, C.; Lucatorto, T.B. // AIP Conference Proceedings;2003, Vol. 683 Issue 1, p444 

    Extreme ultraviolet lithography, operating at a wavelength of about 13.5 nm, will require high-repetition-rate pulsed sources with average power outputs of over 100 W. As the output of the sources approaches this level, the low-power, continuous-wave calibrations of the detectors used to...

  • All-weather calibration of broadband (Robertson-Berger type) meters for ozone dependency. Musil, Charles F.; Bodeker, Greg E.; Scourfield, Malcolm W.J.; Powrie, Leslie W. // South African Journal of Science;Jul/Aug2002, Vol. 98 Issue 7/8, p397 

    Broadband solid-state detectors, which are robust, relatively inexpensive and uncomplicated to operate, are particularly suitable for routine measurements of biologically damaging solar ultraviolet-B (UV-B: 280-320 nm) radiation, especially in developing countries with limited financial...

  • Ion Exchange Chromatography-Indirect Ultraviolet Detection for Separation and Determination of Morpholinium Ionic Liquid Cations. Yu Zhang; Yajie Ma; Hong Yu; Yongqiang Liu // Journal of Chromatographic Science;Jan2017, Vol. 55 Issue 1, p7 

    A rapid analytical method of ion exchange chromatography with indirect ultraviolet detection was developed to determine morpholinium ionic liquid (IL) cations, i.e. N-methyl-N-ethyl morpholinium cation ([MEMo]+) and N-methyl-N-propyl morpholinium cation ([MPMo]+). Chromatographic separation of...

  • Nanocomposites of POC and quantum dots. Borriello, C.; Concilio, S.; Minarini, C.; Iannelli, P.; Di Luccio, T. // AIP Conference Proceedings;7/11/2012, Vol. 1459 Issue 1, p151 

    New luminescent polymer nanocomposites were synthesized combining carbazole/oxadiazole copolymer (POC) and CdSe/ZnS quantum dots (QDs) surface passivated by ionic liquids. Ionic liquid ligands improve the photostability of QDs and their compatibility with polymer allowing the deposition of...

  • Optical Energy Transfer Mechanisms: From Naphthalene to Biacetyl in Liquids and from Pyrazine to Biacetyl. Bayrakceken, Fuat; Yegin, Korkut; Korkmaz, Erdal; Bakis, Yakup; Unal, Bayram // International Journal of Photoenergy;2012, Special section p1 

    Optical energy transfer from naphthalene to biacetyl in liquids at room temperature is studied. Electronically excited naphthalene with 200-260 nm ultraviolet (UV) light emits photons in its emission band and the emitted photons are absorbed by biacetyl, which, in turn, excites biacetyl...

  • UV-curing technologies.  // Medical Device Technology;Mar/Apr2005, Vol. 16 Issue 3, p53 

    Features several ultraviolet (UV)-curing products in the U.S. Introduction of adhesives that are designed to cure in seconds when exposed to medium-intensity UV-and visible light by DYMAX Europe GmbH; Launch of UV/visible spot-curing system by EXFO Precision Assembly Group; Development of LED UV...

  • Ultraviolet Flashes in the Equatorial Region of the Earth. Garipov, G. K.; Panasyuk, M. I.; Tulupov, V. I.; Khrenov, B. A.; Shirokov, A. V.; Yashin, I. V.; Salazar, H. // JETP Letters;8/25/2005, Vol. 82 Issue 4, p185 

    Intense ultraviolet flashes with a duration of 1 to 64 ms have been detected by the UV detector (wavelengths 300–400 nm) that operates at the Universitetsky-Tatiana MSU satellite. Most flashes occur in the equatorial region of the Earth. The nature of the observed flashes is discussed....

  • UV spectrophotometric determination of Etodolac in tablet dosage form. Aakanksha, Bhandari; Renu, Solanki; B. P., Nagori; Mahendra, Nawal; Monika, Bhandari // Journal of Pharmacy Research;Oct2011, Vol. 4 Issue 10, p3309 

    In this study, new and rapid method indicating ultraviolet spectroscopic method was developed and validated for the estimation of Etodolac in pure form and in tablet formulation. The adequate drug solubility and maximum assay sensitivity was found in methanol. The absorbance of Etodolac was...

  • Development and validation of the discriminating method of prasugrel dissolution in tablets using ultraviolet detection. Rigobello, Camila; Barden, Amanda Thomas; Steppe, Martin // Acta Scientiarum: Health Sciences;Jul-Dec2014, Vol. 36 Issue 2, p235 

    Current study develops and validates a dissolution test for Prasugrel hydrochloride 10 mg in coated tablets. After sink condition, filters and drug stability were evaluated, the discriminatory dissolution conditions were achieved with a USP apparatus 1 (basket) at 50 rpm stirring speed and 900...


Read the Article


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

Try another library?
Sign out of this library

Other Topics