Room-temperature subwavelength metallo-dielectric lasers

Nezhad, Maziar P.; Simić, Aleksandar; Bondarenko, Olesya; Slutsky, Boris; Mizrahi, Amit; Feng, Lishuang; Lomakin, Vitaliy; Fainman, Yeshaiahu

doi:10.1038/nphoton.2010.88

Cited by 476 publications

(414 citation statements)

References 20 publications

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“…The weak temperature dependence of the Q factor observed in the present metallic cavity indicates that the metal absorption loss is reduced in our cavity. The higher Q factor observed in the present cavity in comparison to previous reports is attributed to the control of the SiO 2 thickness at the Ag/GaAs interface to reduce the metal absorption [18].…”

Section: Cavity-mode Simulation and Discussioncontrasting

confidence: 58%

“…Optical radiation loss occurs in dielectric cavities due to optical-field extension outside cavities [29]. Metal shield of dielectric cavities confines optical field toward inside of the cavities and reduces optical radiation loss [17,18]. Optical cavity modes show very low temperature dependence of Q factors, in contrast to the one of SPP cavity modes [14].…”

Section: Cavity-mode Simulation and Discussionmentioning

confidence: 99%

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Subwavelength metallic cavities with high-Qresonance modes

Ishihara¹,

Kurosawa²,

Takemoto³

et al. 2015

Nanotechnology

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Metallic cavities have been extensively studied to realize small-volume nanocavities and nanolasers. However cavity-resonance quality (Q) factors of nanolasers observed up to now remain low (up to ~500) due to metal optical absorption. In this paper, we report the observation of highest Q factors of 9000 at low temperature and ~6000 near room temperature in a metallic cavity with a probe of sub-bandgap emission of Si-doped GaAs. We analyze the temperature dependence of cavity-mode resonance wavelengths and show that the refractive-index term dominates the measured temperature dependence. We also show that this refractive-index term is cavity-mode dependent and the fitting procedure offers a new method to identify cavity modes. We simulate the metallic cavity with finite-element method and attribute the high-Q cavity mode to a whispering gallery optical mode. This mode is shown to have isotropic polarization dependence of the output emission, which is preferable for quantum information applications.2

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Section: Cavity-mode Simulation and Discussioncontrasting

confidence: 58%

Section: Cavity-mode Simulation and Discussionmentioning

confidence: 99%

Subwavelength metallic cavities with high-Qresonance modes

Ishihara¹,

Kurosawa²,

Takemoto³

et al. 2015

Nanotechnology

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“…4a) 17 . A popular structure comprises of a metal encapsulated high gain material 17,63 . However, several other forms have been demonstrated, such as nanopatch devices 64 , with a size of just 500 nm in their largest dimension, or vertical travelling-wave core-shell structures terminated by Bragg gratings 65 .…”

Section: Small Laser Types and Their Characteristicsmentioning

confidence: 99%

Advances in small lasers

2014

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In recent years there have been significant advances in the size and characteristics of small lasers, i.e. lasers with dimensions or modes sizes close to or smaller than the wavelength of emitted light. This work has primarily been led by innovative use of new materials and cavity designs. This article reviews some of the latest developments, particularly in metallic and plasmonic lasers, improvements in small dielectric lasers, and the emerging area of small bio-compatible/bioderived lasers. We examine the different approaches employed in small lasers to reduce size and how they lead to significant differences , particularly between metal and dielectric cavity lasers. We present potential applications for the various forms of small lasers and indicate where further developments are required.

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“…Spasers and plasmonic nanolasers with deep subwavelength cavities represent one of the important frontiers of research in nanophotonics and nanotechnology in general. [1][2][3][4][5][6][7][8][9][10] While metals have been used as parts of the laser cavity for long wavelengths, 11 it remains an open question if metals such as silver or gold can be used to make a subwavelength cavity in the near infrared or shorter wavelength, due to dramatically increased metal loss in these wavelengths, especially at RT. 12 Theoretical studies 10,13 that accounted for wavelength compression and metal loss near surface plasmon polariton (SPP) resonance showed that it was indeed possible to realize a net positive gain in a semiconductor-metal core-shell structure.…”

mentioning

confidence: 99%

“…3 While great progress has been made in the past few years in nanolasers with deep subwavelengthsized metal cavities [1][2][3][4][5][6][7][8] and spacers, 2,9 the realization of RT continuous wave (cw) operation under electrical injection has remained elusive. Despite intensive activities worldwide, subwavelength-cavity RT lasing has been demonstrated only under optical [5][6][7] or electrical-pulse pumping, 4 or under cw electrical pumping but at low temperature. 4 RT cw lasing under electrical injection has been observed only for a metallic cavity that is larger than the wavelengths.…”

mentioning

confidence: 99%