Analisis Respons Optik Semiconductor Quantum Dot Sistem Three-Level Bertipe V

Yulyanto Yulyanto, Bintoro S. Nugroho

Abstract


Telah dilakukan studi teoretik untuk mempelajari respons optik semiconductor quantum dot (SQD) yang dieksitasi dengan cahaya monokromatik. SQD yang ditinjau dimodelkan sebagai three-level system bertipe V. Perhitungan teoretik dilakukan menggunakan pendekatan semiklasik dengan memperlakukan SQD sebagai objek kuantum yang berinteraksi dengan medan elektromagnetik klasik. Formalisme density matrix digunakan dalam perumusan SQD dengan faktor damping yang diperhitungkan melalui operator Lindblad. Dari hasil perhitungan, diperoleh bahwa selain frekuensi medan pengeksitasi, frekuensi Rabi ikut menentukan kebergantungan respons optik SQD terhadap intensitas. Sementara, dinamika respons optik SQD (kebergantungan populasi terhadap waktu) menunjukkan bahwa frekuensi osilasi populasi meningkat seiring dengan meningkatnya intensitas medan pengeksitasi. Hasil perhitungan menunjukkan bahwa pada intensitas medan pengeksitasi rendah , spektrum serapan SQD menunjukkan bentuk kurva Lorentzian, sedangkan pada intensitas medan pengeksitasi tinggi , spektrum serapan SQD melebar berbentuk Gaussian akibat power broadening.


Keywords


quantum dot, density matrix, respons optik, three-level system

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References


Kittel, C., Introduction to Solid State Physics, 2004.

Abdullah, M., Pengantar Nanosains, ITB, 2009.

Baimuratov, A.S., Rukhlenko, I.D., Turkov, V. K., Baranov, A.V., and Fedorov, A.V., Quantum-dot supercrystals for future nanophotonics, Scientific Reports, 32013.

Arakawa, Y. In Advances in quantum dots for nanophotonics and quantum information, 2008.

Bimberg, D., Quantum dot based nanophotonics and nanoelectronics, Electronics Letters, 44(5), pp.390, 2008.

Kamat, P.V., Quantum dot solar cells. Semiconductor nanocrystals as light harvesters, Journal of Physical Chemistry C, 112(48), pp.18737–18753, 2008.

Konstantatos, G., Howard, I., Fischer, A., Hoogland, S., Clifford, J., Klem, E., Levina, L., and Sargent, E.H., Ultrasensitive solution-cast quantum dot photodetectors, Nature, 442(7099), pp.180–183, 2006.

Pacifici, D., Lezec, H.J., and Atwater, H.A., All-optical modulation by plasmonic excitation of CdSe quantum dots, Nature Photonics, 1(7), pp.402–406, 2007.

Samia, A. C., Chen, X., and Burda, C., Semiconductor quantum dots for photodynamic therapy, Journal of the American Chemical Society, 125(51), pp.15736–15737, 2003.

Sugawara, M., Hatori, N., Ishida, M., Ebe, H., Arakawa, Y., Akiyama, T., Otsubo, K., Yamamoto, T., and Nakata, Y., Recent progress in self-assembled quantum-dot optical devices for optical telecommunication: Temperature-insensitive 10 Gb s-1directly modulated lasers and 40 Gb s-1signal-regenerative amplifiers, Journal of Physics D: Applied Physics, 38(13), pp.2126–2134, 2005.

Shields, A.J. Semiconductor quantum light sources. Nature Photonics. , 1(4) , 215–223. (2007).

Artuso, R.D. and Bryant, G.W., Optical response of strongly coupled quantum dot-metal nanoparticle systems: Double peaked Fano structure and bistability, Nano Letters, 8(7), pp.2106–2111, 2008.

Li, J.-B., Kim, N.-C., Cheng, M.-T., Zhou, L., Hao, Z.-H., and Wang, Q.-Q., Optical bistability and nonlinearity of coherently coupled exciton-plasmon systems, Optics Express, 20(2), pp.1856, 2012.

Nugroho, B.S., Iskandar, A.A., Malyshev, V.A., and Knoester, J., Instabilities in the optical response of a semiconductor quantum dot - Metal nanoparticle heterodimer: Self-oscillations and chaos, Journal of Optics (United Kingdom), 19(1), 2017.

Ko, M.C., Kim, N.C., Choe, S.Il, So, G.H., Jang, P.R., Kim, Y.J., Kim, I.G., and Li, J.B. Plasmonic Effect on the Optical Properties in a Hybrid V-Type Three-Level Quantum Dot-Metallic Nanoparticle Nanosystem. Plasmonics. , 1–8. (2017).

Wang, Q.Q., Muller, A., Cheng, M.T., Zhou, H.J., Bianucci, P., and Shih, C.K., Coherent control of a V-type three-level system in a single quantum dot, Physical Review Letters, 95(18), 2005.

Yariv, A., Quantum Electronics, 1989.

Muller, A., Wang, Q.Q., Bianucci, P., Shih, C.K., and Xue, Q.K., Determination of anisotropic dipole moments in self-assembled quantum dots using Rabi oscillations, Applied Physics Letters, 84(6), pp.981–983, 2004.

Levine, J., A simplified calculation of power-broadened linewidths, with application to resonance ionization mass spectrometry, Spectrochimica Acta - Part B Atomic Spectroscopy, 69pp.61–66, 2012.

Huxter, V.M., Mirkovic, T., Nair, P.S., and Scholes, G.D., Demonstration of bulk semiconductor optical properties in processable Ag2S and EuS nanocrystalline systems, Advanced Materials, 2008.




DOI: http://dx.doi.org/10.26418/positron.v8i1.25505

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Jurusan Fisika
Fakultas Matematika dan Ilmu Pengetahuan Alam
Universitas Tanjungpura
 Physical Society of Indonesia
Cabang Kalimantan Barat

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