<i>In situ</i> laser microprocessing of single self-assembled quantum dots and optical microcavities

Rastelli, Armando; Ulhaq, Ata; Kiravittaya, Suwit; Wang, L.; Zrenner, A.; Schmidt, Oliver G.

doi:10.1063/1.2431576

Cited by 71 publications

(51 citation statements)

References 16 publications

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“…Another tuning technique that relies on locally heating microcavities to permanently change the structure of the resonator and the QDs has been reported by Rastelli et al 15 In conclusion, we have demonstrated a technique for in situ tuning of QDs by up to 1.4 nm without significant deterioration in the QD emission. This method works locally and reversibly, making it a useful tool for a range of solid-state studies, from local thermometry to quantum information science.…”

Section: -2mentioning

confidence: 82%

Local quantum dot tuning on photonic crystal chips

Faraon

Englund

Fushman

et al. 2007

Applied Physics Letters

126

102

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Electroluminescence from quantum dots fabricated with nanosphere lithography Appl. Phys. Lett. 101, 103105 (2012) Nucleation features and energy levels of type-II InAsSbP quantum dots grown on InAs(100) substrate Appl. Phys. Lett. 101, 093103 (2012) Highly luminescing multi-shell semiconductor nanocrystals InP/ZnSe/ZnS Appl. Phys. Lett. 101, 073107 (2012) Eliminating the fine structure splitting of excitons in self-assembled InAs/GaAs quantum dots via combined stresses Appl.

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Section: -2mentioning

confidence: 82%

Local quantum dot tuning on photonic crystal chips

Faraon

Englund

Fushman

et al. 2007

Applied Physics Letters

126

102

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“…Recent experiments have demonstrated the possibility of irreversible tuning of the modes by using digital etching, 5 scanning probe microscopy assisted oxidation 6 and laser-assisted oxidation 7 or of reversible tuning by gas absorption 8 and laser heating. 9,10 All these methods allow tuning of the cavity modes either on the blue or on the red side, while a complete control of the resonant wavelength requires some combination of different methods.…”

Section: Introductionmentioning

confidence: 99%

Tuning optical modes in slab photonic crystal by atomic layer deposition and laser-assisted oxidation

Kiravittaya

Lee

Balet

et al. 2011

Journal of Applied Physics

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The authors experimentally investigate the effects of atomic layer deposition (ALD) and laser-assisted oxidation on the optical modes in GaAs L3 photonic crystal air-bridge cavities, using layers of InAs quantum dots as internal light source. Four distinct optical mode peaks are observed in the photonic bandgap and they show different wavelength-redshifts (0–6.5 nm) as the photonic crystal surface is coated with an Al2O3 layer (0–5.4 nm thick). Numerical finite-difference time-domain (FDTD) simulations can well-reproduce the experimental result and give insight into the origin of the shifts of modes with different spatial profiles. By combining the ALD coating with in situ laser-assisted oxidation, we are able to both redshift and blueshift the optical modes and we attribute the blueshift to the formation of a GaAs-oxide at the expense of GaAs at the interface between GaAs and the Al2O3 layer. This result can be quantitatively reproduced by including a GaAs-oxide layer into the FDTD model. Selective etching experiments, confirm that this GaAs-oxide layer is mainly at the interface between GaAs and Al2O3 layers.

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“…While deterministic approaches for a highly matched spatial arrangement of emitter and cavity have been demonstrated [8,[23][24][25], the spectral matching at a given temperature needs post fabrication tuning of either the QD transition or the cavity mode. An in-situ manipulation of the QD transition energy has been performed by temperature variation [26], electric fields [27], local heating [28], and laser annealing [29]. For photonic crystal defect cavities [8,[30][31][32][33] and microdisk structures [29,34], precise reversible and irreversible tuning mechanisms have been developed using either surface etching, desorption or deposition.…”

Section: Introductionmentioning

confidence: 99%

Properties and prospects of blue–green emitting II–VI‐based monolithic microcavities

Sebald

Kruse

Wiersig

2009

Physica Status Solidi (b)

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1 Introduction In the last years new ways to manipulate the light-matter interaction were found by modifying photonic components which confine light on the wavelength scale by means of semiconductor microcavities (MCs) [1]. The modified optical density of states produced by photonic structuring allows emission and absorption rates to be enhanced or suppressed. This is known as the Purcell effect which can be used to control the spontaneous emission [2]. Semiconductor MCs appear to a be highly attractive systems for the realization of a new generation of optoelectronic devices, polariton devices, optical switches and spin-memory elements. Several types of solid state MCs [1], including micropillars [3,4], microdisks [5,6] and photonic crystals [7,8], offer very small mode volumes V in combination with high quality factors Q. These factors describe the ability of the cavity to confine the light.

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In situ laser microprocessing of single self-assembled quantum dots and optical microcavities

Cited by 71 publications

References 16 publications

Local quantum dot tuning on photonic crystal chips

Local quantum dot tuning on photonic crystal chips

Tuning optical modes in slab photonic crystal by atomic layer deposition and laser-assisted oxidation

Properties and prospects of blue–green emitting II–VI‐based monolithic microcavities

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