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Title: Electrically Pumped Whispering Gallery Mode Lasing from Au/ZnO Microwire Schottky Junction

Authors:
 [1];  [2];  [1];  [1];  [1];  [1]
  1. Department of Electrical and Computer Engineering, University of California at Riverside, Riverside CA 92521 USA
  2. School of Materials Science and Engineering, Jiangsu University, Jiangsu 212013 China
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1388961
DOE Contract Number:
SC0012670
Resource Type:
Journal Article
Resource Relation:
Journal Name: Advanced Optical Materials; Journal Volume: 4; Journal Issue: 12; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin
Country of Publication:
United States
Language:
English
Subject:
phonons, thermal conductivity, thermoelectric, spin dynamics, spintronics

Citation Formats

Bashar, Sunayna B., Wu, Chunxia, Suja, Mohammad, Tian, Hao, Shi, Wenhao, and Liu, Jianlin. Electrically Pumped Whispering Gallery Mode Lasing from Au/ZnO Microwire Schottky Junction. United States: N. p., 2016. Web. doi:10.1002/adom.201600513.
Bashar, Sunayna B., Wu, Chunxia, Suja, Mohammad, Tian, Hao, Shi, Wenhao, & Liu, Jianlin. Electrically Pumped Whispering Gallery Mode Lasing from Au/ZnO Microwire Schottky Junction. United States. doi:10.1002/adom.201600513.
Bashar, Sunayna B., Wu, Chunxia, Suja, Mohammad, Tian, Hao, Shi, Wenhao, and Liu, Jianlin. 2016. "Electrically Pumped Whispering Gallery Mode Lasing from Au/ZnO Microwire Schottky Junction". United States. doi:10.1002/adom.201600513.
@article{osti_1388961,
title = {Electrically Pumped Whispering Gallery Mode Lasing from Au/ZnO Microwire Schottky Junction},
author = {Bashar, Sunayna B. and Wu, Chunxia and Suja, Mohammad and Tian, Hao and Shi, Wenhao and Liu, Jianlin},
abstractNote = {},
doi = {10.1002/adom.201600513},
journal = {Advanced Optical Materials},
number = 12,
volume = 4,
place = {United States},
year = 2016,
month = 9
}
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  • Lasing from long semiconductor nanorods is dictated by Fabry-Perot (FP) resonances whereas that from large-diameter microrods is determined by whispering gallery modes (WGMs). Lengths and diameters intermediate between the two systems represent an important size regime for photonics and electronics, but have not been studied in detail. Here, we report on the detection of FP and WGM lasing emissions from a single GaN microrod, and demonstrate the ability to switch between the two lasing mechanisms by translating the excitation beam along the microrod. The competition between FP and WGM-type lasing was studied by finite-difference time-domain simulation and statistical analysis bymore » measuring microrods of various diameters. Finally, control over the relative lasing intensities originating from either FPs or WGMs was demonstrated by tuning the polarization of the emission.« less
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  • Bubble-containing Nd{sup 3+}-doped tellurite glass microspheres were fabricated by localized laser heating technique to investigate their optical properties for use as microresonators. Fluorescence and excitation spectra measurements were performed by pumping with a tunable CW-Ti:Sapphire laser. The excitation spectra manifested several sharp peaks due to the conventional whispering gallery mode (WGM) when the pumping laser was irradiated to the edge part of the microsphere. However, when the excitation light was irradiated on the bubble position inside the microsphere, “non-WGM excitation” was induced, giving rise to numerous peaks at a broad wavelength range in the excitation spectra. Thus, efficient excitation wasmore » achieved over a wide wavelength range. Lasing threshold excited at the bubble position was much lower than that for the excitation at the edges of the microsphere. The lowest value of the laser threshold was 34 μW for a 4 μm sphere containing a 0.5 μm bubble. Efficiency of the excitation at the bubble position with broadband light was calculated to be 5 times higher than that for the edge of the microsphere. The bubble-containing microsphere enables efficient utilization of broadband light excitation from light-emitting diodes and solar light.« less