Optical nonlinearities in intersubband transitions and quantum cascade lasers c. Schneider institute of ionbeam physics and material research, germany chapter 8. Use features like bookmarks, note taking and highlighting while reading intersubband transitions in quantum structures. Intersubband transitions in quantum wells springerlink. Secondorder intersubband nonlinearoptical susceptibilities. Semiconductor quantum structures and photonic devices. Intersubband transitions in quantum structures kindle edition by paiella, roberto. Using a simple numerical approach and mathematical modeling applied to the. Intersubband terahertz transitions in landau level system. The iv characteristics, infrared absorption spectra, and photoresponse spectra of superlattices are used to characterize multiple quantum well structure properties in unipolar devices.
Nonlinear intersubband transitions in different shaped. Semiconductor quantum structures and their optical properties. These structures have been the subject of intensive investigation recently including extensive theoretical and experimental studies of their interband optical properties. A variety of techniques have been applied to measure the relaxation time t21 in modulationdoped 49 and undoped 10 structures with e12 wells. Request pdf on jan, 2015, emine ozturk and others published nonlinear intersubband transitions in different shaped quantum wells under intense laser field find, read and cite all the. Intersubband optical transitions in one dimensional. Intersubband transitions in high indium content ingaas. Catalog description optical properties of semiconductors. Rukhlenko 2, 1 itmo university, center of information optical technology, saint petersburg 197101, russia 2 the university of sydney, institute of photonics and optical. The engineered band structure of qws leads to the pos sibility of intersubband isb.
Some of the recent volumes, such as hydrogen in semiconductors, imperfections in iiiv materials, epitaxial microstructures. Physics and device applications, volume 62 1st edition. Download it once and read it on your kindle device, pc, phones or tablets. This work provides experimental results on the intersubband plasmon frequency measured as a function of gating voltage in singlewalled carbon nanotube swcnt thin films. The results show that asymmetric quantumwell structures can be efficiently used in.
Intersubband transitions in quantum structures, paiella. Quantum cascade qc lasers are unipolar semiconductor lasers based on intersubband transitions in quantum wells that cover a large portion of the mid and far infrared electromagnetic spectrum. Intersubband transition energies are computed considering the lowest. Chapter 4 is concerned with the ultrafast phenomena and novel structures. Vi intersubband transitions of normal incidence ntype direct bandgap quantum well structures 68 m. Densitymatrix theory of the optical dynamics and transport in quantum cascade structures. Quantum wells, superlattices, and bandgap engineering.
Midfarinfrared photodetectors based on quantum coherence. Optical absorption in gaas algaas quantum well due to. The dynamics of intersubband transitions in a multiple quantum well system consisting of gaas coupled quantum wells separated by an al x ga 1. The intersubband transition energies of 316 and 350 mev mea sured for the yo. Box 12211, research triangle park, north carolina 277092211. Pdf the electronic structure and optical properties of oneelectron quantum dot. Intersubband transitions in quantum structures, 1st edition pdf.
Quantum well intersubband transition detection and. Intersubband relaxation dynamics in semiconductor quantum. Over 10 million scientific documents at your fingertips. Semiconductor quantum structures and photonic devices objectives the objective of this course is to develop a fundamental understanding of the basic physics and practical operation of semiconductor optoelectronic devices, with emphasis on devices based on quantum structures. Bauer1 1institute of semiconductor and solid state physics, university of linz, linz, austria 2fom institute for plasma physics rijnhuizen, nieuwegein, the netherlands.
In order to observe a strong isbt signal, a heavy silicon doping was made in each inas quantum well. Intersubband transitions in quantumwell heterostructures with. Optical response induced by intersubband transitions in quantum wells. Optically nonlinear effects in intersubband transitions of. We propose midfarinfrared photodetectors based on coherent sumfrequency generation in a nearresonant cascade of interband and intersubband transitions in high optical nonlinearity asymmetric quantum well structures. Phonon assisted intersubband transitions in step quantum.
The importance of asymmetric structure design to achieve considerable. The energy eigenvalues with corresponding density of states are numerically computed using finite difference technique. Quantum well infrared photodetector high absorption and high speed properties, and twophoton response h. Continuous voltage tunabilityof intersubband relaxation times in coupled sige quantum well structures using ultrafast spectroscopy p. Photodetectors based on intersubband transitions using iii. Pdf in this paper, the current status of intersubband lasing in quantum wells is. New device structures based on leaky quantum wells for the. Intersubband transitions in quantum structures and millions of other books are available for amazon kindle. Pdf intersubband transition and electron transport in potentialinserted quantum well structures and their potentials for infrared photodetector. This thesis is a theoretical and experimental investigation of the intersubband transitions in quantum well structures. Control of intersubband transitions in multiple quantum. Intersubband transitions in semiconductor quantum wells qws have been the subject of extensive research for the past several decades.
Intersubband transitions isbts in narrow inasalsb multiple quantum wells mqws were investigated for well widths, d, ranging from 5 nm down to 1. Pdf infrared laser based on intersubband transitions in quantum. We designed the structure of mqws by selfconsistently solving the schrodinger and poisson equations. In this work we present the results of our study of the intersubband optical transitions in 1d semiconductor quantum wires.
In this paper, intersubband optical absorption in gaasalgaas quantum well is investigated. Phonon assisted intersubband transitions in step quantum well structures h. Intersubband plasmon observation in electrochemically. The design of quantum cascade lasers 1 and other devices based on intersubband transitions 2,3 critically depends on the knowledge of the intersubband relaxation times.
The nonlinear optical response of intersubband transitions in quantum wells is rigorously derived and the implications of their resonantlyenhanced nature are examined. The tunable terahertz intersubband landau level transitions in resonant tunneling cascade quantum well structures are considered. Nearinfrared intersubband transitions in deltadoped inas. The nonperturbative theory for the nonlinear optical interaction of quantum well intersubband transitions is developed. Intersubband transitions in quantumwell heterostructures with deltadoped. Intersubband transition in ganingan multiple quantum wells. Band structure and intersubband transitions of threelayer. The way of lifting the selection rule forbidding the interlandau level terahertz transitions of interest by applying a magnetic field tilted with respect to the structure layers is proposed. Haddad department of electrical engineering and computer science, the university of michigan, ann arbor, michigan 481092122 michael a.
Pdf fundamental limits in quantum well intersubband detection. A novel quantum wire laser structure is presented by designing inverted coreshell cylindrical quantum wire using al xga 1xasgaas typei heterostructure. Anisotropic quantum well electrooptics in fewlayer black. Pdf computation of the oscillator strength and absorption.
An important numerical method for solving the problem of boundtocontinuum transitions. Intersubband plasmon excited in heavily doped carbon nanotubes by the external electromagnetic field in the nearinfrared range is known to be sensitive to both the nanotube diameter and fermi level shift. Learn more enter your mobile number or email address below and well send you a link to download the free kindle app. Ryzhii calculation and photoresponse measurements of the longwavelength ir. Electronic tuning of intersubband transition of inverted. Purchase intersubband transitions in quantum wells. Intersubband transition in quantum wells have strong potential for device application and are challenging. It is shown that the gan barrier thickness t b is designed as 25 nm and the in composition is optimized to be 15% in ingan wells for both types of quantum structure. Optical dielectric nanoantenna for quantum cascade laser. Ultrafast dynamics of intersubband excitations in quantum wells and quantum cascade structures t. Photodetectors based on intersubband transitions using iiinitride superlattice structures daniel hofstetter 1, esther baumann, fabrizio r giorgetta1, ricardo ther. The wide conduction band offset such as ganalgan heterostructs has extended the transitions into near infrared region. Design principles based on band structure engineering will be highlighted.
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